def main(args):
nargs = len(args)
if nargs == 3:
fname_out = args[0]
esn0_db = float(args[1])
rep = int(args[2])
else:
sys.stderr.write(
'usage: test_turbo_equalization.py fsm_name_out Es/No_db repetitions\n'
)
sys.exit(1)
# system parameters
Kb = 64 * 16 # packet size in bits (multiple of 16)
modulation = fsm_utils.pam4 # see fsm_utlis.py for available predefined modulations
channel = fsm_utils.c_channel # see fsm_utlis.py for available predefined test channels
fo = trellis.fsm(fname_out) # get the outer FSM specification from a file
fi = trellis.fsm(len(modulation[1]),
len(channel)) # generate the FSM automatically
if fo.O() != fi.I():
sys.stderr.write(
'Incompatible cardinality between outer and inner FSM.\n')
sys.exit(1)
bitspersymbol = int(round(math.log(fo.I()) /
math.log(2))) # bits per FSM input symbol
K = Kb / bitspersymbol # packet size in trellis steps
interleaver = trellis.interleaver(K, 666) # construct a random interleaver
tot_channel = fsm_utils.make_isi_lookup(
modulation, channel,
True) # generate the lookup table (normalize energy to 1)
dimensionality = tot_channel[0]
tot_constellation = tot_channel[1]
if len(tot_constellation) / dimensionality != fi.O():
sys.stderr.write(
'Incompatible FSM output cardinality and lookup table size.\n')
sys.exit(1)
N0 = pow(10.0, -esn0_db / 10.0)
# noise variance
IT = 3 # number of turbo iterations
tot_s = 0 # total number of transmitted shorts
terr_s = 0 # total number of shorts in error
terr_p = 0 # total number of packets in error
for i in range(rep):
(s, e) = run_test(
fo, fi, interleaver, Kb, bitspersymbol, K, channel, modulation,
dimensionality, tot_constellation, 1, N0, IT, -long(666 + i)
) # run experiment with different seed to get different noise realizations
tot_s = tot_s + s
terr_s = terr_s + e
terr_p = terr_p + (terr_s != 0)
if ((i + 1) % 10 == 0): # display progress
print i + 1, terr_p, '%.2e' % ((1.0 * terr_p) /
(i + 1)), tot_s, terr_s, '%.2e' % (
(1.0 * terr_s) / tot_s)
# estimate of the (short or bit) error rate
print rep, terr_p, '%.2e' % ((1.0 * terr_p) /
(i + 1)), tot_s, terr_s, '%.2e' % (
(1.0 * terr_s) / tot_s)
def __init__(self, vlen_in=1, vlen_out=1, n_tailbits=1, denom_mother_code_rate=1, gen_poly=0, bits_per_symbol=1, map_tab=0, pp_0=0, interl_seq_0_2=(0,1), interl_seq_1_2=(0,1), pp_1_tail=0, pp_1=0, pp_0_tail=0, M_total=0, part_len_top=3, part_len_bot=3):
gr.hier_block2.__init__(
self, "MLC 16QAM",
gr.io_signature(1, 1, gr.sizeof_char*1),
gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
)
##################################################
# Parameters
##################################################
self.vlen_in = vlen_in
self.vlen_out = vlen_out
self.n_tailbits = n_tailbits
self.denom_mother_code_rate = denom_mother_code_rate
self.gen_poly = gen_poly
self.bits_per_symbol = bits_per_symbol
self.map_tab = map_tab
self.pp_0 = pp_0
self.interl_seq_0_2 = interl_seq_0_2
self.interl_seq_1_2 = interl_seq_1_2
self.pp_1_tail = pp_1_tail
self.pp_1 = pp_1
self.pp_0_tail = pp_0_tail
self.M_total = M_total
self.part_len_top = part_len_top
self.part_len_bot = part_len_bot
##################################################
# Blocks
##################################################
self.trellis_encoder_xx_top = trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0, 0) if False else trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0)
self.trellis_encoder_xx_bot = trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0, 0) if False else trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0)
self.drm_qam_map_bc_0 = drm.qam_map_bc(map_tab, bits_per_symbol, vlen_out, 2)
self.drm_punct_bb_top = drm.punct_bb(pp_0, pp_0_tail, (part_len_top + n_tailbits) * denom_mother_code_rate, vlen_out * 2, n_tailbits * denom_mother_code_rate)
self.drm_punct_bb_bot = drm.punct_bb(pp_1, pp_1_tail, (part_len_bot + n_tailbits) * denom_mother_code_rate, vlen_out * 2, n_tailbits * denom_mother_code_rate)
self.drm_partitioning_16_bb_0 = drm.partitioning_bb(vlen_in, M_total)
self.drm_interleaver_bb_top = drm.interleaver_bb((interl_seq_0_2))
self.drm_interleaver_bb_bot = drm.interleaver_bb((interl_seq_1_2))
self.drm_add_tailbits_bb_top = drm.add_tailbits_bb(part_len_top, n_tailbits)
self.drm_add_tailbits_bb_bot = drm.add_tailbits_bb(part_len_bot, n_tailbits)
self.blocks_unpack_k_bits_bb_top = blocks.unpack_k_bits_bb(denom_mother_code_rate)
self.blocks_unpack_k_bits_bb_bot = blocks.unpack_k_bits_bb(denom_mother_code_rate)
##################################################
# Connections
##################################################
self.connect((self.blocks_unpack_k_bits_bb_bot, 0), (self.drm_punct_bb_bot, 0))
self.connect((self.blocks_unpack_k_bits_bb_top, 0), (self.drm_punct_bb_top, 0))
self.connect((self.drm_add_tailbits_bb_bot, 0), (self.trellis_encoder_xx_bot, 0))
self.connect((self.drm_add_tailbits_bb_top, 0), (self.trellis_encoder_xx_top, 0))
self.connect((self.drm_interleaver_bb_bot, 0), (self.drm_qam_map_bc_0, 1))
self.connect((self.drm_interleaver_bb_top, 0), (self.drm_qam_map_bc_0, 0))
self.connect((self.drm_partitioning_16_bb_0, 1), (self.drm_add_tailbits_bb_bot, 0))
self.connect((self.drm_partitioning_16_bb_0, 0), (self.drm_add_tailbits_bb_top, 0))
self.connect((self.drm_punct_bb_bot, 0), (self.drm_interleaver_bb_bot, 0))
self.connect((self.drm_punct_bb_top, 0), (self.drm_interleaver_bb_top, 0))
self.connect((self.drm_qam_map_bc_0, 0), (self, 0))
self.connect((self, 0), (self.drm_partitioning_16_bb_0, 0))
self.connect((self.trellis_encoder_xx_bot, 0), (self.blocks_unpack_k_bits_bb_bot, 0))
self.connect((self.trellis_encoder_xx_top, 0), (self.blocks_unpack_k_bits_bb_top, 0))
def __init__(self, ftype):
super(trellis_pccc_decoder_combined_tb, self).__init__()
func = eval("trellis.pccc_decoder_combined_" + ftype)
dsttype = gr.sizeof_int
if ftype[1] == "b":
dsttype = gr.sizeof_char
elif ftype[1] == "s":
dsttype = gr.sizeof_short
elif ftype[1] == "i":
dsttype = gr.sizeof_int
src_func = eval("blocks.vector_source_" + ftype[0])
data = [1 * 200]
src = src_func(data)
self.dst = blocks.null_sink(dsttype * 1)
constellation = [
1, 1, 1, 1, 1, -1, 1, -1, 1, 1, -1, -1, -1, 1, 1, -1, 1, -1, -1,
-1, 1, -1, -1, -1
]
vbc = func(trellis.fsm(), 0, -1, trellis.fsm(), 0, -1,
trellis.interleaver(), 10, 10, trellis.TRELLIS_MIN_SUM, 2,
constellation, digital.TRELLIS_EUCLIDEAN, 1.0)
##################################################
# Connections
##################################################
self.connect((src, 0), (vbc, 0))
self.connect((vbc, 0), (self.dst, 0))
def set_denom_mother_code_rate(self, denom_mother_code_rate):
self.denom_mother_code_rate = denom_mother_code_rate
self.trellis_encoder_xx_top_0.set_FSM(
trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_top.set_FSM(
trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_bot.set_FSM(
trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
def set_gen_poly(self, gen_poly):
self.gen_poly = gen_poly
self.trellis_encoder_xx_top_0.set_FSM(
trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_top.set_FSM(
trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_bot.set_FSM(
trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
def set_fsm1(self, fsm1):
self.fsm1 = fsm1
self.trellis_viterbi_combined_xx_1.set_FSM(
trellis.fsm(self.prefix + self.fsm1))
self.trellis_viterbi_combined_xx_0_0.set_FSM(
trellis.fsm(self.prefix + self.fsm1))
self.trellis_encoder_xx_2.set_FSM(trellis.fsm(self.prefix + self.fsm1))
self.trellis_encoder_xx_0.set_FSM(trellis.fsm(self.prefix + self.fsm1))
def set_fsm2(self, fsm2):
self.fsm2 = fsm2
self.trellis_viterbi_combined_xx_2.set_FSM(
trellis.fsm(self.prefix + self.fsm2))
self.trellis_viterbi_combined_xx_0.set_FSM(
trellis.fsm(self.prefix + self.fsm2))
self.trellis_encoder_xx_2_0.set_FSM(
trellis.fsm(self.prefix + self.fsm2))
self.trellis_encoder_xx_1.set_FSM(trellis.fsm(self.prefix + self.fsm2))
def main(args):
nargs = len(args)
if nargs == 3:
fname_out = args[0]
esn0_db = float(args[1])
rep = int(args[2])
else:
sys.stderr.write("usage: test_turbo_equalization.py fsm_name_out Es/No_db repetitions\n")
sys.exit(1)
# system parameters
Kb = 64 * 16 # packet size in bits (multiple of 16)
modulation = fsm_utils.pam4 # see fsm_utlis.py for available predefined modulations
channel = fsm_utils.c_channel # see fsm_utlis.py for available predefined test channels
fo = trellis.fsm(fname_out) # get the outer FSM specification from a file
fi = trellis.fsm(len(modulation[1]), len(channel)) # generate the FSM automatically
if fo.O() != fi.I():
sys.stderr.write("Incompatible cardinality between outer and inner FSM.\n")
sys.exit(1)
bitspersymbol = int(round(math.log(fo.I()) / math.log(2))) # bits per FSM input symbol
K = Kb / bitspersymbol # packet size in trellis steps
print "size = ", K
interleaver = trellis.interleaver(K, 666) # construct a random interleaver
tot_channel = fsm_utils.make_isi_lookup(
modulation, channel, True
) # generate the lookup table (normalize energy to 1)
dimensionality = tot_channel[0]
tot_constellation = tot_channel[1]
if len(tot_constellation) / dimensionality != fi.O():
sys.stderr.write("Incompatible FSM output cardinality and lookup table size.\n")
sys.exit(1)
N0 = pow(10.0, -esn0_db / 10.0)
# noise variance
IT = 3 # number of turbo iterations
tot_s = 0 # total number of transmitted shorts
terr_s = 0 # total number of shorts in error
terr_p = 0 # total number of packets in error
for i in range(rep):
(s, e) = run_test(
fo, fi, interleaver, Kb, bitspersymbol, K, dimensionality, tot_constellation, 1, N0, IT, -long(666 + i)
) # run experiment with different seed to get different noise realizations
print s
tot_s = tot_s + s
terr_s = terr_s + e
terr_p = terr_p + (terr_s != 0)
if (i + 1) % 10 == 0: # display progress
print i + 1, terr_p, "%.2e" % ((1.0 * terr_p) / (i + 1)), tot_s, terr_s, "%.2e" % ((1.0 * terr_s) / tot_s)
# estimate of the (short or bit) error rate
print rep, terr_p, "%.2e" % ((1.0 * terr_p) / (i + 1)), tot_s, terr_s, "%.2e" % ((1.0 * terr_s) / tot_s)
def main(args):
nargs = len(args)
if nargs == 5:
fname_out = args[0]
fname_in = args[1]
esn0_db = float(args[2]) # Es/No in dB
IT = int(args[3])
rep = int(args[4]) # number of times the experiment is run to collect enough errors
else:
sys.stderr.write("usage: test_sccc_turbo.py fsm_name_out fsm_fname_in Es/No_db iterations repetitions\n")
sys.exit(1)
# system parameters
Kb = 1024 * 16 # packet size in bits (make it multiple of 16 so it can be packed in a short)
fo = trellis.fsm(fname_out) # get the outer FSM specification from a file
fi = trellis.fsm(fname_in) # get the innner FSM specification from a file
bitspersymbol = int(round(math.log(fo.I()) / math.log(2))) # bits per FSM input symbol
if fo.O() != fi.I():
sys.stderr.write("Incompatible cardinality between outer and inner FSM.\n")
sys.exit(1)
K = Kb / bitspersymbol # packet size in trellis steps
interleaver = trellis.interleaver(K, 666) # construct a random interleaver
modulation = fsm_utils.psk8 # see fsm_utlis.py for available predefined modulations
dimensionality = modulation[0]
constellation = modulation[1]
if len(constellation) / dimensionality != fi.O():
sys.stderr.write("Incompatible FSM output cardinality and modulation size.\n")
sys.exit(1)
# calculate average symbol energy
Es = 0
for i in range(len(constellation)):
Es = Es + constellation[i] ** 2
Es = Es / (len(constellation) / dimensionality)
N0 = Es / pow(10.0, esn0_db / 10.0)
# calculate noise variance
tot_s = 0 # total number of transmitted shorts
terr_s = 0 # total number of shorts in error
terr_p = 0 # total number of packets in error
for i in range(rep):
(s, e) = run_test(
fo, fi, interleaver, Kb, bitspersymbol, K, dimensionality, constellation, Es, N0, IT, -long(666 + i)
) # run experiment with different seed to get different noise realizations
tot_s = tot_s + s
terr_s = terr_s + e
terr_p = terr_p + (terr_s != 0)
if (i + 1) % 10 == 0: # display progress
print i + 1, terr_p, "%.2e" % ((1.0 * terr_p) / (i + 1)), tot_s, terr_s, "%.2e" % ((1.0 * terr_s) / tot_s)
# estimate of the (short or bit) error rate
print rep, terr_p, "%.2e" % ((1.0 * terr_p) / (i + 1)), tot_s, terr_s, "%.2e" % ((1.0 * terr_s) / tot_s)
def make_gmsk(samples_per_symbol, BT):
# M, K, P, h, L are fixed for GMSK
M = 2 # number of bits per symbol
K = 1
P = 2 # h=K/P, K and P are relatively prime
h = (1.0 * K) / P
L = 3
Q = samples_per_symbol
frac = 0.99 # fractional energy component deemed necessary to consider in the trellis, for finding dimensionality
fsm = trellis.fsm(P, M, L)
tt = numpy.arange(0, L * Q) / (1.0 * Q) - L / 2.0
p = (
0.5 * scipy.stats.erfc(2 * math.pi * BT * (tt - 0.5) / math.sqrt(math.log(2.0)) / math.sqrt(2.0))
- 0.5 * scipy.stats.erfc(2 * math.pi * BT * (tt + 0.5) / math.sqrt(math.log(2.0)) / math.sqrt(2.0))
) / 2.0
p = p / sum(p) * Q / 2.0
q = numpy.cumsum(p) / Q
q = q / q[-1] / 2.0
(f0T, SS, S, F, Sf, Ff, N) = fsm_utils.make_cpm_signals(K, P, M, L, q, frac)
constellation = numpy.reshape(numpy.transpose(Sf), N * fsm.O())
Ffa = numpy.insert(Ff, Q, numpy.zeros(N), axis=0)
MF = numpy.fliplr(numpy.transpose(Ffa))
return (fsm, constellation, MF, N, f0T)
def make_gmsk(samples_per_symbol, BT):
#M, K, P, h, L are fixed for GMSK
M = 2 #number of bits per symbol
K = 1
P = 2 #h=K/P, K and P are relatively prime
h = (1.0 * K) / P
L = 3
Q = samples_per_symbol
frac = 0.99 #fractional energy component deemed necessary to consider in the trellis, for finding dimensionality
fsm = trellis.fsm(P, M, L)
tt = numpy.arange(0, L * Q) / (1.0 * Q) - L / 2.0
p = (0.5 * scipy.stats.erfc(2 * math.pi * BT * (tt - 0.5) / math.sqrt(
math.log(2.0)) / math.sqrt(2.0)) - 0.5 * scipy.stats.erfc(
2 * math.pi * BT *
(tt + 0.5) / math.sqrt(math.log(2.0)) / math.sqrt(2.0))) / 2.0
p = p / sum(p) * Q / 2.0
q = numpy.cumsum(p) / Q
q = q / q[-1] / 2.0
(f0T, SS, S, F, Sf, Ff,
N) = fsm_utils.make_cpm_signals(K, P, M, L, q, frac)
constellation = numpy.reshape(numpy.transpose(Sf), N * fsm.O())
Ffa = numpy.insert(Ff, Q, numpy.zeros(N), axis=0)
MF = numpy.fliplr(numpy.transpose(Ffa))
return (fsm, constellation, MF, N, f0T)
def test_convolutional_encoder(self):
"""
Tests convolutional encoder
"""
src_data = make_transport_stream()
constellation = [.7, .7, .7, -.7, -.7, .7, -.7, -.7]
src = gr.vector_source_b(src_data)
unpack = gr.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST)
enc = dvb_convolutional_encoder_bb.convolutional_encoder_bb()
repack1 = gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
repack2 = gr.packed_to_unpacked_bb(2, gr.GR_MSB_FIRST)
mapper = gr.chunks_to_symbols_bf(constellation,
dvb_swig.dimensionality)
viterbi = trellis.viterbi_combined_fb(
trellis.fsm(dvb_swig.k, dvb_swig.n,
dvb_convolutional_encoder_bb.G), dvb_swig.K, -1, -1,
dvb_swig.dimensionality, constellation, digital.TRELLIS_EUCLIDEAN)
pack = gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
dst = gr.vector_sink_b()
self.tb.connect(src, unpack, enc, repack1, repack2, mapper)
self.tb.connect(mapper, viterbi, pack, dst)
self.tb.run()
result_data = dst.data()
self.assertEqual(tuple(src_data[:len(result_data)]), result_data)
def set_modulation(self, modulation):
self.modulation = modulation
self.set_tot_mod(
fu.make_isi_lookup(self.modulation, self.channel, False))
self.set_fsm(trellis.fsm(len(self.modulation[1]), len(self.channel)))
self.digital_chunks_to_symbols_xx_0_0.set_symbol_table(
(self.modulation[1]))
def main(args):
nargs = len (args)
if nargs == 4:
fname_out=args[0]
fname_in=args[1]
esn0_db=float(args[2]) # Es/No in dB
rep=int(args[3]) # number of times the experiment is run to collect enough errors
else:
sys.stderr.write ('usage: test_tcm.py fsm_name_out fsm_fname_in Es/No_db repetitions\n')
sys.exit (1)
# system parameters
Kb=1024*16 # packet size in bits (make it multiple of 16 so it can be packed in a short)
fo=trellis.fsm(fname_out) # get the outer FSM specification from a file
fi=trellis.fsm(fname_in) # get the innner FSM specification from a file
bitspersymbol = int(round(math.log(fo.I())/math.log(2))) # bits per FSM input symbol
if fo.O() != fi.I():
sys.stderr.write ('Incompatible cardinality between outer and inner FSM.\n')
sys.exit (1)
K=Kb/bitspersymbol # packet size in trellis steps
interleaver=trellis.interleaver(K,666) # construct a random interleaver
modulation = fsm_utils.psk8 # see fsm_utlis.py for available predefined modulations
dimensionality = modulation[0]
constellation = modulation[1]
if len(constellation)/dimensionality != fi.O():
sys.stderr.write ('Incompatible FSM output cardinality and modulation size.\n')
sys.exit (1)
# calculate average symbol energy
Es = 0
for i in range(len(constellation)):
Es = Es + constellation[i]**2
Es = Es / (len(constellation)/dimensionality)
N0=Es/pow(10.0,esn0_db/10.0); # calculate noise variance
tot_s=0 # total number of transmitted shorts
terr_s=0 # total number of shorts in error
terr_p=0 # total number of packets in error
for i in range(rep):
(s,e)=run_test(fo,fi,interleaver,Kb,bitspersymbol,K,dimensionality,constellation,N0,-long(666+i)) # run experiment with different seed to get different noise realizations
tot_s=tot_s+s
terr_s=terr_s+e
terr_p=terr_p+(terr_s!=0)
if ((i+1)%100==0) : # display progress
print i+1,terr_p, '%.2e' % ((1.0*terr_p)/(i+1)),tot_s,terr_s, '%.2e' % ((1.0*terr_s)/tot_s)
# estimate of the (short or bit) error rate
print rep,terr_p, '%.2e' % ((1.0*terr_p)/(i+1)),tot_s,terr_s, '%.2e' % ((1.0*terr_s)/tot_s)
def __init__(self, ftype):
super(trellis_sccc_decoder_tb, self).__init__()
func = eval("trellis.sccc_decoder_" + ftype)
dsttype = gr.sizeof_int
if ftype == "b":
dsttype = gr.sizeof_char
elif ftype == "s":
dsttype = gr.sizeof_short
elif ftype == "i":
dsttype = gr.sizeof_int
data = [1 * 200]
src = blocks.vector_source_f(data)
self.dst = blocks.null_sink(dsttype * 1)
vbc = func(trellis.fsm(), 0, -1, trellis.fsm(1, 3, [91, 121, 117]), 0,
-1, trellis.interleaver(), 10, 10, trellis.TRELLIS_MIN_SUM)
self.connect((src, 0), (vbc, 0))
self.connect((vbc, 0), (self.dst, 0))
def __init__(self):
gr.hier_block2.__init__(self,
"bch_viterbi_vfvb",
gr.io_signature(1, 1, gr.sizeof_float * 120), # Input signature
gr.io_signature(1, 1, gr.sizeof_char * 40)) # Output signature
# Define blocks and connect them
# Repeat input vector one time to get viterbi decoder state right (tail-biting stuff)
#self.rpt = blocks.repeat(gr.sizeof_float * 120, 2)
# viterbi decoder requires stream as input
#self.vtos = blocks.vector_to_stream(1 * gr.sizeof_float, 120)
# self.vtss = blocks.vector_to_streams(1* gr.sizeof_float, 120, "bch_viterbi_vector_to_streams_0")
self.vtss = blocks.vector_to_streams(1* gr.sizeof_float, 120)
#self.app = blocks.streams_to_stream(1* gr.sizeof_float, 138, "bch_viterbi_streams_to_stream_0")
self.app = blocks.streams_to_stream(1* gr.sizeof_float, 138)
self.connect(self, self.vtss)
for i in range(18):
self.connect( (self.vtss, 120-18+i), (self.app, i) )
for i in range(120):
self.connect( (self.vtss, i), (self.app, i+18) )
# Correct FSM instantiation: k=num_input_bits, n=num_output_bits, Tuple[dim(k*n)] (decimal notation)
self.fsm = trellis.fsm(1, 3, [91, 121, 117])
# Values for viterbi decoder
K = 46 # steps for one coding block
SO = 0 # initial state
SK = -1 # final state (in this case unknown, therefore -1)
D = 3 # dimensionality
# D = 3 follows from the fact that 1 {0,1} input symbol of the encoder produces 3 {0,1} output symbols.
# (packed into one byte {0,1,...,7} )
# with NRZ coding follows:
# 0 --> 1
# 1 --> -1
# This leads to the following constellation input
# | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
constellation = [1, 1, 1, 1, 1, -1, 1, -1, 1, 1, -1, -1, -1, 1, 1, -1, 1, -1, -1, -1, 1, -1, -1, -1]
# print "len(constellation)/D = " + str(len(constellation)/D) + "\tfsm.O = " + str(self.fsm.O())
# Viterbi_combined input: FSM, K, SO, SK, D, TABLE, TYPE
# FSM = Finite State Machine
# K = number of output symbols produced by the FSM
# SO = initial state of the FSM
# SK = final state of the FSM (unknown in this example)
# D = dimensionality
# TABLE = constellation of the input symbols
# self.vit = trellis.viterbi_combined_fb(self.fsm, K, SO, SK, D, constellation, 200, "bch_viterbi_combined_fb_0")
self.vit = trellis.viterbi_combined_fb(self.fsm, K, SO, SK, D, constellation, 200)
self.connect(self.app, self.vit)
# connect all streams which are crated yet
#self.connect(self,self.rpt,self.vtos,self.vit)
# self.keep = blocks.keep_m_in_n(gr.sizeof_char, 40, 46, 6, "bch_viterbi_keep_m_in_n_0")
self.keep = blocks.keep_m_in_n(gr.sizeof_char, 40, 46, 6)
# self.tovec = blocks.stream_to_vector(1, 40, "bch_viterbi_stream_to_vector_0")
self.tovec = blocks.stream_to_vector(1, 40)
self.connect(self.vit, self.keep, self.tovec, self)
def __init__(self): gr.hier_block2.__init__(self, "dvb_convolutional_encoder_bb", gr.io_signature(1, 1, gr.sizeof_char), # Input signature gr.io_signature(1, 1, gr.sizeof_char)) # Output signature self.encoder = trellis.encoder_bb(trellis.fsm(dvb_swig.k, dvb_swig.n, G), dvb_swig.dimensionality) self.unpack = gr.unpack_k_bits_bb(dvb_swig.dimensionality) self.connect(self, self.encoder, self.unpack, self)
def __init__(self, N):
self.N = N
# Generate some random bits
rndm = random.Random()
rndm.seed(0)
self.coding = 1
self.interleave = 0
self.fo = trellis.fsm(1, 2, [91, 121])
def __init__(self):
gr.hier_block2.__init__(
self,
"bch_viterbi_vfvb",
gr.io_signature(1, 1, gr.sizeof_float * 120), # Input signature
gr.io_signature(1, 1, gr.sizeof_char * 40)) # Output signature
# Define blocks and connect them
# Repeat input vector one time to get viterbi decoder state right (tail-biting stuff)
#self.rpt = blocks.repeat(gr.sizeof_float * 120, 2)
# viterbi decoder requires stream as input
#self.vtos = blocks.vector_to_stream(1 * gr.sizeof_float, 120)
self.vtss = blocks.vector_to_streams(1 * gr.sizeof_float, 120)
self.app = blocks.streams_to_stream(1 * gr.sizeof_float, 138)
self.connect(self, self.vtss)
for i in range(18):
self.connect((self.vtss, 120 - 18 + i), (self.app, i))
for i in range(120):
self.connect((self.vtss, i), (self.app, i + 18))
# Correct FSM instantiation: k=num_input_bits, n=num_output_bits, Tuple[dim(k*n)] (decimal notation)
self.fsm = trellis.fsm(1, 3, [91, 121, 117])
# Values for viterbi decoder
K = 46 # steps for one coding block
SO = 0 # initial state
SK = -1 # final state (in this case unknown, therefore -1)
D = 3 # dimensionality
# D = 3 follows from the fact that 1 {0,1} input symbol of the encoder produces 3 {0,1} output symbols.
# (packed into one byte {0,1,...,7} )
# with NRZ coding follows:
# 0 --> 1
# 1 --> -1
# This leads to the following constellation input
# | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
constellation = [
1, 1, 1, 1, 1, -1, 1, -1, 1, 1, -1, -1, -1, 1, 1, -1, 1, -1, -1,
-1, 1, -1, -1, -1
]
# print "len(constellation)/D = " + str(len(constellation)/D) + "\tfsm.O = " + str(self.fsm.O())
# Viterbi_combined input: FSM, K, SO, SK, D, TABLE, TYPE
# FSM = Finite State Machine
# K = number of output symbols produced by the FSM
# SO = initial state of the FSM
# SK = final state of the FSM (unknown in this example)
# D = dimensionality
# TABLE = constellation of the input symbols
self.vit = trellis.viterbi_combined_fb(self.fsm, K, SO, SK, D,
constellation, 200)
self.connect(self.app, self.vit)
# connect all streams which are crated yet
#self.connect(self,self.rpt,self.vtos,self.vit)
self.keep = blocks.keep_m_in_n(gr.sizeof_char, 40, 46, 6)
self.tovec = blocks.stream_to_vector(1, 40)
self.connect(self.vit, self.keep, self.tovec, self)
def __init__(self, N):
self.N = N
# Generate some random bits
rndm = random.Random()
rndm.seed(0)
self.coding = 1
self.interleave = 0
self.fo=trellis.fsm(1,2,[91,121])
def __init__(self, ):
# """
# docstring
# """
gr.hier_block2.__init__(self, "viterbi_vfvb",
gr.io_signature(1,1, gr.sizeof_float*120), # sizeof (<+float+>)), # Input signature
gr.io_signature(1,1, gr.sizeof_char*40 )) #sizeof (<+float+>))) # Output signature
#print "\nlte_viterbi_vfvb START"
#tpp=gr.tag_propagation_policy()
#################################
# Define blocks
# Repeat input vector one time to get viterbi decoder state right (tail-biting stuff)
self.rpt = gr.repeat(gr.sizeof_float*120,2)
# viterbi decoder requires stream as input
self.vtos = gr.vector_to_stream(1*gr.sizeof_float,120)
# Correct FSM instantiation: k=num_input_bits, n=num_output_bits, Tuple[dim(k*n)] (decimal notation)
self.fsm = trellis.fsm(1,3,[91,121,117])
# Values for viterbi decoder
K = 80 # steps for one coding block
SO = 0 # initial state
SK = -1 # final state (in this case unknown, therefore -1)
D = 3 # dimensionality
# D = 3 follows from the fact that 1 {0,1} input symbol of the encoder produces 3 {0,1} output symbols.
# (packed into one byte {0,1,...,7} )
# with NRZ coding follows:
# 0 --> 1
# 1 --> -1
# This leads to the following constellation input
# | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
constellation = [1,1,1,1,1,-1,1,-1,1,1,-1,-1,-1,1,1,-1,1,-1,-1,-1,1,-1,-1,-1]
# print "len(constellation)/D = " + str(len(constellation)/D) + "\tfsm.O = " + str(self.fsm.O())
# Viterbi_combined input: FSM, K, SO, SK, D, TABLE, TYPE
# FSM = Finite State Machine
# K = number of output symbols produced by the FSM
# SO = initial state of the FSM
# SK = final state of the FSM (unknown in this example)
# D = dimensionality
# TABLE = constellation of the input symbols
self.vit = trellis.viterbi_combined_fb(self.fsm,K,SO,SK,D,constellation,200)
# stream output of viterbi decoder to vector
self.stov2 = gr.stream_to_vector(1*gr.sizeof_char,80)
# second half of the viterbi output carries desired information. (tail-biting stuff)
my_map=range(40)
for i in my_map:
my_map[i]=i+40
self.map = lte.vector_resize_vbvb(my_map,80,40)
self.connect(self,self.rpt,self.vtos,self.vit,self.stov2,self.map,self)
def main(args):
nargs = len(args)
if nargs == 3:
fname = args[0]
esn0_db = float(args[1]) # Es/No in dB
rep = int(
args[2]
) # number of times the experiment is run to collect enough errors
else:
sys.stderr.write(
'usage: test_tcm_combined.py fsm_fname Es/No_db repetitions\n')
sys.exit(1)
# system parameters
f = trellis.fsm(
fname
) # get the FSM specification from a file (will hopefully be automated in the future...)
Kb = 1024 * 16 # packet size in bits (make it multiple of 16)
bitspersymbol = int(round(math.log(f.I()) /
math.log(2))) # bits per FSM input symbol
K = Kb / bitspersymbol # packet size in trellis steps
modulation = fsm_utils.psk4 # see fsm_utils.py for available predefined modulations
dimensionality = modulation[0]
constellation = modulation[1]
if len(constellation) / dimensionality != f.O():
sys.stderr.write(
'Incompatible FSM output cardinality and modulation size.\n')
sys.exit(1)
# calculate average symbol energy
Es = 0
for i in range(len(constellation)):
Es = Es + constellation[i]**2
Es = Es / (len(constellation) / dimensionality)
N0 = Es / pow(10.0, esn0_db / 10.0)
# noise variance
tot_s = 0 # total number of transmitted shorts
terr_s = 0 # total number of shorts in error
terr_p = 0 # total number of packets in error
for i in range(rep):
(s, e) = run_test(
f, Kb, bitspersymbol, K, dimensionality, constellation, N0,
-long(666 + i)
) # run experiment with different seed to get different noise realizations
tot_s = tot_s + s
terr_s = terr_s + e
terr_p = terr_p + (terr_s != 0)
if ((i + 1) % 100 == 0): # display progress
print i + 1, terr_p, '%.2e' % ((1.0 * terr_p) /
(i + 1)), tot_s, terr_s, '%.2e' % (
(1.0 * terr_s) / tot_s)
# estimate of the (short or bit) error rate
print rep, terr_p, '%.2e' % ((1.0 * terr_p) /
(i + 1)), tot_s, terr_s, '%.2e' % (
(1.0 * terr_s) / tot_s)
def __init__(self):
gr.hier_block2.__init__(
self,
"dvb_convolutional_encoder_bb",
gr.io_signature(1, 1, gr.sizeof_char), # Input signature
gr.io_signature(1, 1, gr.sizeof_char)) # Output signature
self.encoder = trellis.encoder_bb(
trellis.fsm(dvb_swig.k, dvb_swig.n, G), dvb_swig.dimensionality)
self.unpack = gr.unpack_k_bits_bb(dvb_swig.dimensionality)
self.connect(self, self.encoder, self.unpack, self)
def main(args):
nargs = len(args)
if nargs == 2:
esn0_db = float(args[0])
rep = int(args[1])
else:
sys.stderr.write(
'usage: test_viterbi_equalization1.py Es/No_db repetitions\n')
sys.exit(1)
# system parameters
Kb = 2048 # packet size in bits
modulation = fsm_utils.pam4 # see fsm_utlis.py for available predefined modulations
channel = fsm_utils.c_channel # see fsm_utlis.py for available predefined test channels
f = trellis.fsm(len(modulation[1]),
len(channel)) # generate the FSM automatically
bitspersymbol = int(round(math.log(f.I()) /
math.log(2))) # bits per FSM input symbol
K = Kb / bitspersymbol # packet size in trellis steps
tot_channel = fsm_utils.make_isi_lookup(
modulation, channel,
True) # generate the lookup table (normalize energy to 1)
dimensionality = tot_channel[0]
tot_constellation = tot_channel[1]
N0 = pow(10.0, -esn0_db / 10.0)
# noise variance
if len(tot_constellation) / dimensionality != f.O():
sys.stderr.write(
'Incompatible FSM output cardinality and lookup table size.\n')
sys.exit(1)
tot_s = 0 # total number of transmitted shorts
terr_s = 0 # total number of shorts in error
terr_p = 0 # total number of packets in error
for i in range(rep):
(s, e) = run_test(
f, Kb, bitspersymbol, K, channel, modulation, dimensionality,
tot_constellation, N0, -long(666 + i)
) # run experiment with different seed to get different data and noise realizations
tot_s = tot_s + s
terr_s = terr_s + e
terr_p = terr_p + (terr_s != 0)
if ((i + 1) % 100 == 0): # display progress
print i + 1, terr_p, '%.2e' % ((1.0 * terr_p) /
(i + 1)), tot_s, terr_s, '%.2e' % (
(1.0 * terr_s) / tot_s)
# estimate of the (short or symbol) error rate
print rep, terr_p, '%.2e' % ((1.0 * terr_p) /
(i + 1)), tot_s, terr_s, '%.2e' % (
(1.0 * terr_s) / tot_s)
def main():
parser = OptionParser(option_class=eng_option)
parser.add_option("-f", "--fsm_file", type="string", default="fsm_files/awgn1o2_4.fsm", help="Filename containing the fsm specification, e.g. -f fsm_files/awgn1o2_4.fsm (default=fsm_files/awgn1o2_4.fsm)")
parser.add_option("-e", "--esn0", type="eng_float", default=10.0, help="Symbol energy to noise PSD level ratio in dB, e.g., -e 10.0 (default=10.0)")
parser.add_option("-r", "--repetitions", type="int", default=100, help="Number of packets to be generated for the simulation, e.g., -r 100 (default=100)")
(options, args) = parser.parse_args ()
if len(args) != 0:
parser.print_help()
raise SystemExit(1)
fname=options.fsm_file
esn0_db=float(options.esn0)
rep=int(options.repetitions)
# system parameters
f=trellis.fsm(fname) # get the FSM specification from a file
# alternatively you can specify the fsm from its generator matrix
#f=trellis.fsm(1,2,[5,7])
Kb=1024*16 # packet size in bits (make it multiple of 16 so it can be packed in a short)
bitspersymbol = int(round(math.log(f.I()) / math.log(2))) # bits per FSM input symbol
K=Kb / bitspersymbol # packet size in trellis steps
modulation = fsm_utils.psk4 # see fsm_utlis.py for available predefined modulations
dimensionality = modulation[0]
constellation = modulation[1]
if len(constellation) / dimensionality != f.O():
sys.stderr.write ('Incompatible FSM output cardinality and modulation size.\n')
sys.exit (1)
# calculate average symbol energy
Es = 0
for i in range(len(constellation)):
Es = Es + constellation[i]**2
Es = Es / (len(constellation)//dimensionality)
N0=Es / pow(10.0,esn0_db/10.0); # calculate noise variance
tot_b=0 # total number of transmitted bits
terr_b=0 # total number of bits in error
terr_p=0 # total number of packets in error
for i in range(rep):
(b,e,pattern)=run_test(f,Kb,bitspersymbol,K,dimensionality,constellation,N0,-(666+i)) # run experiment with different seed to get different noise realizations
tot_b=tot_b+b
terr_b=terr_b+e
terr_p=terr_p+(e!=0)
if ((i+1)%100==0) : # display progress
print(i+1,terr_p, '%.2e' % ((1.0*terr_p) / (i+1)),tot_b,terr_b, '%.2e' % ((1.0*terr_b) / tot_b))
if e!=0:
print("rep=",i, e)
for k in range(Kb):
if pattern[k]!=0:
print(k)
# estimate of the bit error rate
print(rep,terr_p, '%.2e' % ((1.0*terr_p) / (i+1)),tot_b,terr_b, '%.2e' % ((1.0*terr_b) / tot_b))
def test_001_viterbi(self):
"""
Runs some coding/decoding tests with a few different FSM
specs.
"""
for name, args in fsm_args.items():
constellation = constells[args[2]]
fsms = trellis.fsm(*args)
noise = 0.1
tb = trellis_tb(constellation, fsms, noise)
tb.run()
# Make sure all packets successfully transmitted.
self.assertEqual(tb.dst.ntotal(), tb.dst.nright())
def test_001_viterbi(self):
"""
Runs some coding/decoding tests with a few different FSM
specs.
"""
for name, args in list(fsm_args.items()):
constellation = constells[args[2]]
fsms = trellis.fsm(*args)
noise = 0.1
tb = trellis_tb(constellation, fsms, noise)
tb.run()
# Make sure all packets successfully transmitted.
self.assertEqual(tb.dst.ntotal(), tb.dst.nright())
def set_prefix(self, prefix):
self.prefix = prefix
self.trellis_viterbi_combined_xx_2.set_FSM(
trellis.fsm(self.prefix + self.fsm2))
self.trellis_viterbi_combined_xx_1.set_FSM(
trellis.fsm(self.prefix + self.fsm1))
self.trellis_viterbi_combined_xx_0_0.set_FSM(
trellis.fsm(self.prefix + self.fsm1))
self.trellis_viterbi_combined_xx_0.set_FSM(
trellis.fsm(self.prefix + self.fsm2))
self.trellis_encoder_xx_2_0.set_FSM(
trellis.fsm(self.prefix + self.fsm2))
self.trellis_encoder_xx_2.set_FSM(trellis.fsm(self.prefix + self.fsm1))
self.trellis_encoder_xx_1.set_FSM(trellis.fsm(self.prefix + self.fsm2))
self.trellis_encoder_xx_0.set_FSM(trellis.fsm(self.prefix + self.fsm1))
def __init__(self, pkt_len, nb_pkt, EbN0dB, fsm):
gr.top_block.__init__(self,
"Transmitter, channel and metrics computation")
##################################################
# Variables
##################################################
self.pkt_len = pkt_len
Rc = 0.5
self.const = const = digital.constellation_bpsk().base()
var_c = 1
Nb = 1
Eb = var_c / (2.0 * Nb * Rc)
N0 = Eb * 10**(-EbN0dB / 10.0)
noisevar = 2 * N0
##################################################
# Blocks
##################################################
self.bits_src = blocks.vector_source_b(
map(int, numpy.random.randint(0, 2, nb_pkt * pkt_len)), False)
self.trellis_encoder = trellis.encoder_bb(trellis.fsm(fsm), 0, pkt_len)
self.unpack = blocks.unpack_k_bits_bb(2)
self.to_symbols = digital.chunks_to_symbols_bc((const.points()), 1)
self.noise_src = analog.noise_source_c(analog.GR_GAUSSIAN, noisevar, 0)
self.noise_adder = blocks.add_vcc(1)
self.metrics_computer = trellis.metrics_c(
4, 2, ([-1, -1, -1, 1, 1, -1, 1, 1]), digital.TRELLIS_EUCLIDEAN)
self.dst = blocks.vector_sink_f()
##################################################
# Connections
##################################################
self.connect((self.bits_src, 0), (self.trellis_encoder, 0))
self.connect((self.trellis_encoder, 0), (self.unpack, 0))
self.connect((self.unpack, 0), (self.to_symbols, 0))
self.connect((self.to_symbols, 0), (self.noise_adder, 0))
self.connect((self.noise_src, 0), (self.noise_adder, 1))
self.connect((self.noise_adder, 0), (self.metrics_computer, 0))
self.connect((self.metrics_computer, 0), (self.dst, 0))
def __init__(self, vlen_in=1, vlen_out=1, n_tailbits=6, denom_mother_code_rate=6, gen_poly=(91, 121, 101, 91, 121, 101), N=1, bits_per_symbol=0, pp=0, pp_tail=0, interl_seq=range(2), map_tab=0): gr.hier_block2.__init__( self, "DRM MLC 4-QAM", gr.io_signature(1, 1, gr.sizeof_char*vlen_in), gr.io_signature(1, 1, gr.sizeof_gr_complex*vlen_out), ) ################################################## # Parameters ################################################## self.vlen_in = vlen_in self.vlen_out = vlen_out self.n_tailbits = n_tailbits self.denom_mother_code_rate = denom_mother_code_rate self.gen_poly = gen_poly self.N = N self.bits_per_symbol = bits_per_symbol self.pp = pp self.pp_tail = pp_tail self.interl_seq = interl_seq self.map_tab = map_tab ################################################## # Blocks ################################################## self.trellis_encoder_xx_0 = trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0) self.gr_vector_to_stream_0 = gr.vector_to_stream(gr.sizeof_char*1, vlen_in + n_tailbits) self.gr_unpack_k_bits_bb_0 = gr.unpack_k_bits_bb(denom_mother_code_rate) self.gr_stream_to_vector_0 = gr.stream_to_vector(gr.sizeof_char*1, (vlen_in + n_tailbits) * denom_mother_code_rate) self.drm_qam_map_vbvc_0 = drm.qam_map_vbvc(map_tab, bits_per_symbol, vlen_out, 1) self.drm_punct_vbvb_0 = drm.punct_vbvb(pp, pp_tail, (vlen_in + n_tailbits) * denom_mother_code_rate, vlen_out * 2, n_tailbits * denom_mother_code_rate) self.drm_interleaver_vbvb_0 = drm.interleaver_vbvb((interl_seq)) self.add_tailbits_vbvb_0 = drm.add_tailbits_vbvb(vlen_in, n_tailbits) ################################################## # Connections ################################################## self.connect((self, 0), (self.add_tailbits_vbvb_0, 0)) self.connect((self.add_tailbits_vbvb_0, 0), (self.gr_vector_to_stream_0, 0)) self.connect((self.gr_vector_to_stream_0, 0), (self.trellis_encoder_xx_0, 0)) self.connect((self.trellis_encoder_xx_0, 0), (self.gr_unpack_k_bits_bb_0, 0)) self.connect((self.gr_unpack_k_bits_bb_0, 0), (self.gr_stream_to_vector_0, 0)) self.connect((self.gr_stream_to_vector_0, 0), (self.drm_punct_vbvb_0, 0)) self.connect((self.drm_punct_vbvb_0, 0), (self.drm_interleaver_vbvb_0, 0)) self.connect((self.drm_interleaver_vbvb_0, 0), (self.drm_qam_map_vbvc_0, 0)) self.connect((self.drm_qam_map_vbvc_0, 0), (self, 0))
def main(args):
nargs = len(args)
if nargs == 3:
fname = args[0]
esn0_db = float(args[1]) # Es/No in dB
# number of times the experiment is run to collect enough errors
rep = int(args[2])
else:
sys.stderr.write(
'usage: test_tcm.py fsm_fname Es/No_db repetitions\n')
sys.exit(1)
# system parameters
f = trellis.fsm(fname) # get the FSM specification from a file
# packet size in bits (make it multiple of 16 so it can be packed in a short)
Kb = 1024 * 16
# bits per FSM input symbol
bitspersymbol = int(round(math.log(f.I()) / math.log(2)))
K = Kb / bitspersymbol # packet size in trellis steps
modulation = fsm_utils.psk4 # see fsm_utlis.py for available predefined modulations
dimensionality = modulation[0]
constellation = modulation[1]
if len(constellation) / dimensionality != f.O():
sys.stderr.write(
'Incompatible FSM output cardinality and modulation size.\n')
sys.exit(1)
# calculate average symbol energy
Es = 0
for i in range(len(constellation)):
Es = Es + constellation[i]**2
Es = Es / (len(constellation) // dimensionality)
N0 = Es / pow(10.0, esn0_db / 10.0) # noise variance
tot_s = 0
terr_s = 0
for i in range(rep):
# run experiment with different seed to get different noise realizations
(s, e) = run_test(f, Kb, bitspersymbol, K, dimensionality,
constellation, N0, -int(666 + i))
tot_s = tot_s + s
terr_s = terr_s + e
if (i % 100 == 0):
print(i, s, e, tot_s, terr_s, '%e' % ((1.0 * terr_s) / tot_s))
# estimate of the (short) error rate
print(tot_s, terr_s, '%e' % ((1.0 * terr_s) / tot_s))
def main(args):
nargs = len(args)
if nargs == 2:
esn0_db = float(args[0])
rep = int(args[1])
else:
sys.stderr.write("usage: test_viterbi_equalization.py Es/No_db repetitions\n")
sys.exit(1)
# system parameters
Kb = 128 * 16 # packet size in bits (multiple of 16)
modulation = fsm_utils.pam4 # see fsm_utlis.py for available predefined modulations
channel = fsm_utils.c_channel # see fsm_utlis.py for available predefined test channels
f = trellis.fsm(len(modulation[1]), len(channel)) # generate the FSM automatically
bitspersymbol = int(round(math.log(f.I()) / math.log(2))) # bits per FSM input symbol
K = Kb / bitspersymbol # packet size in trellis steps
tot_channel = fsm_utils.make_isi_lookup(
modulation, channel, True
) # generate the lookup table (normalize energy to 1)
dimensionality = tot_channel[0]
tot_constellation = tot_channel[1]
N0 = pow(10.0, -esn0_db / 10.0)
# noise variance
if len(tot_constellation) / dimensionality != f.O():
sys.stderr.write("Incompatible FSM output cardinality and lookup table size.\n")
sys.exit(1)
tot_s = 0 # total number of transmitted shorts
terr_s = 0 # total number of shorts in error
terr_p = 0 # total number of packets in error
for i in range(rep):
(s, e) = run_test(
f, Kb, bitspersymbol, K, dimensionality, tot_constellation, N0, -long(666 + i)
) # run experiment with different seed to get different noise realizations
tot_s = tot_s + s
terr_s = terr_s + e
terr_p = terr_p + (terr_s != 0)
if (i + 1) % 100 == 0: # display progress
print i + 1, terr_p, "%.2e" % ((1.0 * terr_p) / (i + 1)), tot_s, terr_s, "%.2e" % ((1.0 * terr_s) / tot_s)
# estimate of the (short or bit) error rate
print rep, terr_p, "%.2e" % ((1.0 * terr_p) / (i + 1)), tot_s, terr_s, "%.2e" % ((1.0 * terr_s) / tot_s)
def __init__(self, vlen_in=1, vlen_out=1, n_tailbits=1, denom_mother_code_rate=1, map_tab=0, interl_seq=(0,1), bits_per_symbol=1, pp=0, pp_tail=0, gen_poly=0):
gr.hier_block2.__init__(
self, "MLC 4QAM",
gr.io_signature(1, 1, gr.sizeof_char*1),
gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
)
##################################################
# Parameters
##################################################
self.vlen_in = vlen_in
self.vlen_out = vlen_out
self.n_tailbits = n_tailbits
self.denom_mother_code_rate = denom_mother_code_rate
self.map_tab = map_tab
self.interl_seq = interl_seq
self.bits_per_symbol = bits_per_symbol
self.pp = pp
self.pp_tail = pp_tail
self.gen_poly = gen_poly
##################################################
# Blocks
##################################################
self.trellis_encoder_xx_0 = trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0, 0) if False else trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0)
self.drm_qam_map_bc_0 = drm.qam_map_bc(map_tab, bits_per_symbol, vlen_out, 1)
self.drm_punct_bb_0 = drm.punct_bb(pp, pp_tail, (vlen_in + n_tailbits) * denom_mother_code_rate, vlen_out * 2, n_tailbits * denom_mother_code_rate)
self.drm_interleaver_bb_0 = drm.interleaver_bb(((interl_seq)))
self.blocks_unpack_k_bits_bb_0 = blocks.unpack_k_bits_bb(denom_mother_code_rate)
self.add_tailbits_bb_0 = drm.add_tailbits_bb(vlen_in, n_tailbits)
##################################################
# Connections
##################################################
self.connect((self.add_tailbits_bb_0, 0), (self.trellis_encoder_xx_0, 0))
self.connect((self.blocks_unpack_k_bits_bb_0, 0), (self.drm_punct_bb_0, 0))
self.connect((self.drm_interleaver_bb_0, 0), (self.drm_qam_map_bc_0, 0))
self.connect((self.drm_punct_bb_0, 0), (self.drm_interleaver_bb_0, 0))
self.connect((self.drm_qam_map_bc_0, 0), (self, 0))
self.connect((self, 0), (self.add_tailbits_bb_0, 0))
self.connect((self.trellis_encoder_xx_0, 0), (self.blocks_unpack_k_bits_bb_0, 0))
def test_001_t(self):
# Trellislength
K = 3072 # Bit in one packet
n = 2 # Bit in codeword
k = 5 # Constraint length
start_state = 0
end_state = -1 # Endstate not defined
fsm = fsm_args["awgn1o2_16"]
## setup dummy data
os = numpy.array(fsm[4], dtype=int) # Encoder output matrix
data = numpy.random.randint(0, 2, K) # Create 0s and 1s
sym_table = digital.constellation_qpsk()
# Setup blocks
data_src = blocks.vector_source_s(map(int, data))
src_head = blocks.head(gr.sizeof_short * 1, K)
# TX Sim
encoder = trellis.encoder_ss(trellis.fsm(*fsm), 0)
modulator = digital.chunks_to_symbols_sc(sym_table.points(), 1)
# Decoder
viterbi_cel = celec.gen_viterbi_fi(n, k, K, start_state, end_state,
sym_table.points(), os)
# Sinks
rx_sink = blocks.vector_sink_b(1)
# Connections
self.tb.connect(data_src, src_head, encoder)
self.tb.connect(encoder, modulator)
self.tb.connect(modulator, viterbi_cel)
self.tb.connect(viterbi_cel, rx_sink)
self.tb.run()
# # Check data
rx_output = numpy.array(rx_sink.data())
for k in range(0, K):
self.assertEqual(int(rx_output[k]), int(data[k]))
def main(args):
nargs = len (args)
if nargs == 3:
fname=args[0]
esn0_db=float(args[1]) # Es/No in dB
rep=int(args[2]) # number of times the experiment is run to collect enough errors
else:
sys.stderr.write ('usage: test_tcm.py fsm_fname Es/No_db repetitions\n')
sys.exit (1)
# system parameters
f=trellis.fsm(fname) # get the FSM specification from a file
P=4 # how many parallel streams?
Kb=1024*16 # packet size in bits (make it multiple of 16 so it can be packed in a short)
bitspersymbol = int(round(math.log(f.I())/math.log(2))) # bits per FSM input symbol
K=Kb/bitspersymbol # packet size in trellis steps
modulation = fsm_utils.psk4 # see fsm_utlis.py for available predefined modulations
dimensionality = modulation[0]
constellation = modulation[1]
if len(constellation)/dimensionality != f.O():
sys.stderr.write ('Incompatible FSM output cardinality and modulation size.\n')
sys.exit (1)
# calculate average symbol energy
Es = 0
for i in range(len(constellation)):
Es = Es + constellation[i]**2
Es = Es / (len(constellation)/dimensionality)
N0=Es/pow(10.0,esn0_db/10.0); # calculate noise variance
tot_s=0 # total number of transmitted shorts
terr_s=0 # total number of shorts in error
terr_p=0 # total number of packets in error
for i in range(rep):
(s,e)=run_test(f,Kb,bitspersymbol,K,dimensionality,constellation,N0,-long(666+i),P) # run experiment with different seed to get different noise realizations
tot_s=tot_s+s
terr_s=terr_s+e
terr_p=terr_p+(terr_s!=0)
if ((i+1)%100==0) : # display progress
print i+1,terr_p, '%.2e' % ((1.0*terr_p)/(i+1)),tot_s,terr_s, '%.2e' % ((1.0*terr_s)/tot_s)
# estimate of the (short or bit) error rate
print rep,terr_p, '%.2e' % ((1.0*terr_p)/(i+1)),tot_s,terr_s, '%.2e' % ((1.0*terr_s)/tot_s)
def test_001_t (self):
# Trellislength
K = 3072 # Bit in one packet
n = 2 # Bit in codeword
k = 5 # Constraint length
start_state = 0
end_state = -1 # Endstate not defined
fsm = fsm_args["awgn1o2_16"]
## setup dummy data
os = numpy.array(fsm[4], dtype=int) # Encoder output matrix
data = numpy.random.randint(0,2,K) # Create 0s and 1s
sym_table = digital.constellation_qpsk()
# Setup blocks
data_src = blocks.vector_source_s(map(int, data))
src_head = blocks.head(gr.sizeof_short*1, K)
# TX Sim
encoder = trellis.encoder_ss(trellis.fsm(*fsm), 0)
modulator = digital.chunks_to_symbols_sc(sym_table.points(), 1)
# Decoder
viterbi_cel = celec.gen_viterbi_fi(n, k, K, start_state, end_state,
sym_table.points(), os)
# Sinks
rx_sink = blocks.vector_sink_b(1)
# Connections
self.tb.connect(data_src, src_head, encoder)
self.tb.connect(encoder, modulator)
self.tb.connect(modulator, viterbi_cel)
self.tb.connect(viterbi_cel, rx_sink)
self.tb.run ()
# # Check data
rx_output = numpy.array(rx_sink.data())
for k in range(0, K):
self.assertEqual(int(rx_output[k]), int(data[k]))
def fsm_radix(f,n):
I=f.I()**n
S=f.S()
O=f.O()**n
nsm=list([0]*I*S)
osm=list([0]*I*S)
for s in range(f.S()):
for i in range(I):
ii=dec2base(i,f.I(),n)
oo=list([0]*n)
ns=s
for k in range(n):
oo[k]=f.OS()[ns*f.I()+ii[k]]
ns=f.NS()[ns*f.I()+ii[k]]
nsm[s*I+i]=ns
osm[s*I+i]=base2dec(oo,f.O())
f=trellis.fsm(I,S,O,nsm,osm)
return f
def test_convolutional_encoder(self): """ Tests convolutional encoder """ src_data = make_transport_stream() constellation = [.7, .7,.7,-.7,-.7,.7,-.7,-.7] src = gr.vector_source_b(src_data) unpack = gr.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST) enc = dvb_convolutional_encoder_bb.convolutional_encoder_bb() repack1 = gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST) repack2 = gr.packed_to_unpacked_bb(2, gr.GR_MSB_FIRST) mapper = gr.chunks_to_symbols_bf(constellation, dvb_swig.dimensionality) viterbi = trellis.viterbi_combined_fb(trellis.fsm(dvb_swig.k, dvb_swig.n, dvb_convolutional_encoder_bb.G), dvb_swig.K, -1, -1, dvb_swig.dimensionality, constellation, trellis.TRELLIS_EUCLIDEAN) pack = gr.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST) dst = gr.vector_sink_b() self.tb.connect(src, unpack, enc, repack1, repack2, mapper) self.tb.connect(mapper, viterbi, pack, dst) self.tb.run() result_data = dst.data() self.assertEqual(tuple(src_data[:len(result_data)]), result_data)
def fsm_concatenate(f1,f2):
if f1.O() > f2.I():
print "Not compatible FSMs\n"
I=f1.I()
S=f1.S()*f2.S()
O=f2.O()
nsm=list([0]*I*S)
osm=list([0]*I*S)
for s1 in range(f1.S()):
for s2 in range(f2.S()):
for i in range(f1.I()):
ns1=f1.NS()[s1*f1.I()+i]
o1=f1.OS()[s1*f1.I()+i]
ns2=f2.NS()[s2*f2.I()+o1]
o2=f2.OS()[s2*f2.I()+o1]
s=s1*f2.S()+s2
ns=ns1*f2.S()+ns2
nsm[s*I+i]=ns
osm[s*I+i]=o2
f=trellis.fsm(I,S,O,nsm,osm)
return f
def __init__(self, options):
gr.hier_block2.__init__(self, "transmit_path",
gr.io_signature(0, 0, 0),
gr.io_signature(1, 1, gr.sizeof_gr_complex))
common_options.defaults(options)
config = self.config = station_configuration()
config.data_subcarriers = options.subcarriers
config.cp_length = options.cp_length
config.frame_data_blocks = options.data_blocks
config._verbose = options.verbose
config.fft_length = options.fft_length
config.dc_null = options.dc_null
config.training_data = default_block_header(config.data_subcarriers,
config.fft_length,
config.dc_null, options)
config.coding = options.coding
config.bandwidth = options.bandwidth
config.gui_frame_rate = options.gui_frame_rate
config.fbmc = options.fbmc
config.frame_id_blocks = 1 # FIXME
# digital rms amplitude sent to USRP
rms_amp = options.rms_amplitude
self._options = copy.copy(options)
config.block_length = config.fft_length + config.cp_length
config.frame_data_part = config.frame_data_blocks + config.frame_id_blocks
config.frame_length = config.frame_data_part + \
config.training_data.no_pilotsyms
config.subcarriers = config.data_subcarriers + \
config.training_data.pilot_subcarriers
config.virtual_subcarriers = config.fft_length - config.subcarriers - config.dc_null
# default values if parameters not set
if rms_amp is None:
rms_amp = math.sqrt(config.subcarriers)
config.rms_amplitude = rms_amp
# check some bounds
if config.fft_length < config.subcarriers:
raise SystemError, "Subcarrier number must be less than FFT length"
if config.fft_length < config.cp_length:
raise SystemError, "Cyclic prefix length must be less than FFT length"
## shortcuts
blen = config.block_length
flen = config.frame_length
dsubc = config.data_subcarriers
vsubc = config.virtual_subcarriers
# Adaptive Transmitter Concept
used_id_bits = config.used_id_bits = 8 #TODO: no constant in source code
rep_id_bits = config.rep_id_bits = config.data_subcarriers / used_id_bits #BPSK
if config.data_subcarriers % used_id_bits <> 0:
raise SystemError, "Data subcarriers need to be multiple of %d" % (
used_id_bits)
# adapt OFDM frame rate and GUI display frame rate
self.keep_frame_n = int(
1.0 / (config.frame_length *
(config.cp_length + config.fft_length) / config.bandwidth) /
config.gui_frame_rate)
## Allocation Control
self.allocation_src = allocation_src(
config.data_subcarriers, config.frame_data_blocks, config.coding,
"tcp://*:3333", "tcp://" + options.rx_hostname + ":3322")
if options.static_allocation: #DEBUG
# how many bits per subcarrier
if options.coding:
mode = 1 # Coding mode 1-9
bitspermode = [0.5, 1, 1.5, 2, 3, 4, 4.5, 5,
6] # Information bits per mode
modulbitspermode = [1, 2, 2, 4, 4, 6, 6, 6,
8] # Coding bits per mode
bitcount_vec = [
(int)(config.data_subcarriers * config.frame_data_blocks *
bitspermode[mode - 1])
]
modul_bitcount_vec = [
config.data_subcarriers * config.frame_data_blocks *
modulbitspermode[mode - 1]
]
bitcount_src = blocks.vector_source_i(bitcount_vec, True, 1)
modul_bitcount_src = blocks.vector_source_i(
modul_bitcount_vec, True, 1)
bitloading = mode
else:
bitloading = 1
bitcount_vec = [
config.data_subcarriers * config.frame_data_blocks *
bitloading
]
bitcount_src = blocks.vector_source_i(bitcount_vec, True, 1)
modul_bitcount_src = bitcount_src
# id's for frames
id_vec = range(0, 256)
id_src = blocks.vector_source_s(id_vec, True, 1)
# bitloading for ID symbol and then once for data symbols
#bitloading_vec = [1]*dsubc+[0]*(dsubc/2)+[2]*(dsubc/2)
#test_allocation = [bitloading]*(int)(config.data_subcarriers/8)+ [0]*(int)(config.data_subcarriers/4*3) + [bitloading]*(int)(config.data_subcarriers/8)
#bitloading_vec = [1]*dsubc+[bitloading]*dsubc
test_allocation = [bitloading] * dsubc
bitloading_vec = [bitloading] * dsubc + test_allocation
bitloading_src = blocks.vector_source_b(bitloading_vec, True,
dsubc)
# bitcount for frames
#bitcount_vec = [config.data_subcarriers*config.frame_data_blocks*bitloading]
bitcount_vec = [config.frame_data_blocks * sum(test_allocation)]
bitcount_src = blocks.vector_source_i(bitcount_vec, True, 1)
# power loading, here same for all symbols
#power_vec = [1]*(int)(config.data_subcarriers/8)+ [0]*(int)(config.data_subcarriers/4*3) + [1]*(int)(config.data_subcarriers/8)
power_vec = [1] * config.data_subcarriers
power_src = blocks.vector_source_f(power_vec, True, dsubc)
# mux control stream to mux id and data bits
mux_vec = [0] * dsubc + [1] * bitcount_vec[0]
mux_ctrl = blocks.vector_source_b(mux_vec, True, 1)
else:
id_src = (self.allocation_src, 0)
bitcount_src = (self.allocation_src, 4)
bitloading_src = (self.allocation_src, 2)
power_src = (self.allocation_src, 1)
if options.coding:
modul_bitcount_src = (self.allocation_src, 5)
else:
modul_bitcount_src = bitcount_src
mux_ctrl = ofdm.tx_mux_ctrl(dsubc)
self.connect(modul_bitcount_src, mux_ctrl)
#Initial allocation
self.allocation_src.set_allocation([2] * config.data_subcarriers,
[1] * config.data_subcarriers)
self.allocation_src.set_allocation_scheme(0)
if options.benchmarking:
self.allocation_src.set_allocation(
[4] * config.data_subcarriers,
[1] * config.data_subcarriers)
if options.lab_special_case:
self.allocation_src.set_allocation(
[0] * (config.data_subcarriers / 4) + [2] *
(config.data_subcarriers / 2) + [0] *
(config.data_subcarriers / 4), [1] * config.data_subcarriers)
if options.log:
log_to_file(self, id_src, "data/id_src.short")
log_to_file(self, bitcount_src, "data/bitcount_src.int")
log_to_file(self, bitloading_src, "data/bitloading_src.char")
log_to_file(self, power_src, "data/power_src.cmplx")
## GUI probe output
zmq_probe_bitloading = zeromq.pub_sink(gr.sizeof_char, dsubc,
"tcp://*:4445")
# also skip ID symbol bitloading with keep_one_in_n (side effect)
# factor 2 for bitloading because we have two vectors per frame, one for id symbol and one for all payload/data symbols
# factor config.frame_data_part for power because there is one vector per ofdm symbol per frame
self.connect(bitloading_src,
blocks.keep_one_in_n(gr.sizeof_char * dsubc, 2 * 40),
zmq_probe_bitloading)
zmq_probe_power = zeromq.pub_sink(gr.sizeof_float, dsubc,
"tcp://*:4444")
#self.connect(power_src, blocks.keep_one_in_n(gr.sizeof_gr_complex*dsubc,40), blocks.complex_to_real(dsubc), zmq_probe_power)
self.connect(power_src,
blocks.keep_one_in_n(gr.sizeof_float * dsubc, 40),
zmq_probe_power)
## Workaround to avoid periodic structure
seed(1)
whitener_pn = [
randint(0, 1) for i in range(used_id_bits * rep_id_bits)
]
## ID Encoder
id_enc = self._id_encoder = repetition_encoder_sb(
used_id_bits, rep_id_bits, whitener_pn)
self.connect(id_src, id_enc)
if options.log:
id_enc_f = gr.char_to_float()
self.connect(id_enc, id_enc_f)
log_to_file(self, id_enc_f, "data/id_enc_out.float")
## Reference Data Source
ber_ref_src = ber_reference_source(self._options)
self.connect(id_src, (ber_ref_src, 0))
self.connect(bitcount_src, (ber_ref_src, 1))
if options.log:
log_to_file(self, ber_ref_src, "data/ber_rec_src_tx.char")
if options.log:
log_to_file(self, btrig, "data/bitmap_trig.char")
## Bitmap Update Trigger for puncturing
if not options.nopunct:
bmaptrig_stream_puncturing = [
1
] + [0] * (config.frame_data_blocks / 2 - 1)
btrig_puncturing = self._bitmap_trigger_puncturing = blocks.vector_source_b(
bmaptrig_stream_puncturing, True)
bmapsrc_stream_puncturing = [1] * dsubc + [2] * dsubc
bsrc_puncturing = self._bitmap_src_puncturing = blocks.vector_source_b(
bmapsrc_stream_puncturing, True, dsubc)
if options.log and options.coding and not options.nopunct:
log_to_file(self, btrig_puncturing,
"data/bitmap_trig_puncturing.char")
## Frame Trigger
ftrig_stream = [1] + [0] * (config.frame_data_part - 1)
ftrig = self._frame_trigger = blocks.vector_source_b(
ftrig_stream, True)
## Data Multiplexer
# Input 0: control stream
# Input 1: encoded ID stream
# Inputs 2..n: data streams
dmux = self._data_multiplexer = stream_controlled_mux_b()
self.connect(mux_ctrl, (dmux, 0))
self.connect(id_enc, (dmux, 1))
if options.coding:
fo = trellis.fsm(1, 2, [91, 121])
encoder = self._encoder = trellis.encoder_bb(fo, 0)
unpack = self._unpack = blocks.unpack_k_bits_bb(2)
self.connect(ber_ref_src, encoder, unpack)
if options.interleave:
int_object = trellis.interleaver(2000, 666)
interlv = trellis.permutation(int_object.K(),
int_object.INTER(), 1,
gr.sizeof_char)
if not options.nopunct:
bmaptrig_stream_puncturing = [
1
] + [0] * (config.frame_data_blocks / 2 - 1)
btrig_puncturing = self._bitmap_trigger_puncturing = blocks.vector_source_b(
bmaptrig_stream_puncturing, True)
puncturing = self._puncturing = puncture_bb(
config.data_subcarriers)
self.connect(bitloading_src, (puncturing, 1))
self.connect(self._bitmap_trigger_puncturing, (puncturing, 2))
self.connect(unpack, puncturing)
last_block = puncturing
if options.interleave:
self.connect(last_block, interlv)
last_block = interlv
if options.benchmarking:
self.connect(last_block,
blocks.head(gr.sizeof_char, options.N),
(dmux, 2))
else:
self.connect(last_block, (dmux, 2))
else:
if options.benchmarking:
self.connect(unpack, blocks.head(gr.sizeof_char,
options.N), (dmux, 2))
else:
self.connect(unpack, (dmux, 2))
else:
if options.benchmarking:
self.connect(ber_ref_src, blocks.head(gr.sizeof_char,
options.N), (dmux, 2))
else:
self.connect(ber_ref_src, (dmux, 2))
if options.log:
dmux_f = gr.char_to_float()
self.connect(dmux, dmux_f)
log_to_file(self, dmux_f, "data/dmux_out.float")
## Modulator
mod = self._modulator = generic_mapper_bcv(config.data_subcarriers,
config.coding,
config.frame_data_part)
self.connect(dmux, (mod, 0))
self.connect(bitloading_src, (mod, 1))
#log_to_file(self, mod, "data/mod_out.compl")
if options.log:
log_to_file(self, mod, "data/mod_out.compl")
modi = blocks.complex_to_imag(config.data_subcarriers)
modr = blocks.complex_to_real(config.data_subcarriers)
self.connect(mod, modi)
self.connect(mod, modr)
log_to_file(self, modi, "data/mod_imag_out.float")
log_to_file(self, modr, "data/mod_real_out.float")
## Power allocator
pa = self._power_allocator = multiply_frame_fc(config.frame_data_part,
config.data_subcarriers)
self.connect(mod, (pa, 0))
self.connect(power_src, (pa, 1))
if options.log:
log_to_file(self, pa, "data/pa_out.compl")
# Standard Transmitter Parts
## Pilot subcarriers
psubc = self._pilot_subcarrier_inserter = pilot_subcarrier_inserter()
self.connect(pa, psubc)
if options.log:
log_to_file(self, psubc, "data/psubc_out.compl")
## Add virtual subcarriers
if config.fft_length > config.subcarriers:
vsubc = self._virtual_subcarrier_extender = \
vector_padding_dc_null(config.subcarriers, config.fft_length,config.dc_null)
self.connect(psubc, vsubc)
else:
vsubc = self._virtual_subcarrier_extender = psubc
if options.log:
log_to_file(self, vsubc, "data/vsubc_out.compl")
## IFFT, no window, block shift
ifft = self._ifft = fft_blocks.fft_vcc(config.fft_length, False, [],
True)
self.connect(vsubc, ifft)
if options.log:
log_to_file(self, ifft, "data/ifft_out.compl")
## Pilot blocks (preambles)
pblocks = self._pilot_block_inserter = pilot_block_inserter(5, False)
self.connect(ifft, pblocks)
if options.log:
log_to_file(self, pblocks, "data/pilot_block_ins_out.compl")
## Cyclic Prefix
cp = self._cyclic_prefixer = cyclic_prefixer(config.fft_length,
config.block_length)
self.connect(pblocks, cp)
lastblock = cp
if options.log:
log_to_file(self, cp, "data/cp_out.compl")
#Digital Amplifier for resource allocation
#if not options.coding:
rep = blocks.repeat(gr.sizeof_gr_complex,
config.frame_length * config.block_length)
amp = blocks.multiply_cc()
self.connect(lastblock, (amp, 0))
self.connect((self.allocation_src, 3), rep, (amp, 1))
lastblock = amp
## Digital Amplifier
#amp = self._amplifier = gr.multiply_const_cc(1)
amp = self._amplifier = ofdm.multiply_const_ccf(1.0)
self.connect(lastblock, amp)
self.set_rms_amplitude(rms_amp)
if options.log:
log_to_file(self, amp, "data/amp_tx_out.compl")
## Tx parameters
bandwidth = options.bandwidth or 2e6
bits = 8 * config.data_subcarriers * config.frame_data_blocks # max. QAM256
samples_per_frame = config.frame_length * config.block_length
tb = samples_per_frame / bandwidth
# set dummy carrier frequency if none available due to baseband mode
if (options.tx_freq is None):
options.tx_freq = 0.0
self.tx_parameters = {'carrier_frequency':options.tx_freq/1e9,'fft_size':config.fft_length, 'cp_size':config.cp_length \
, 'subcarrier_spacing':options.bandwidth/config.fft_length/1e3 \
, 'data_subcarriers':config.data_subcarriers, 'bandwidth':options.bandwidth/1e6 \
, 'frame_length':config.frame_length \
, 'symbol_time':(config.cp_length + config.fft_length)/options.bandwidth*1e6, 'max_data_rate':(bits/tb)/1e6}
## Setup Output
self.connect(amp, self)
# Display some information about the setup
if config._verbose:
self._print_verbage()
#header_formatter = digital.packet_header_default(bits_per_header, length_tag_name,num_tag_name,header_mod.bits_per_symbol()); #tcm_indicator_symbols_per_frame=4; #Zhe added, 4 bits are used as tcm mode indicator, it is used as a part of header. # Achilles' comment: this may change later when filler bits are introduced... print "bits_per_header=",bits_per_header print "symbols_per_header=",symbols_per_header #print "tcm_indicator_symbols_per_frame=",tcm_indicator_symbols_per_frame print "\n" #trellis coding and modulation info payload_mod = [digital.constellation_qpsk(),digital.constellation_8psk()] pdir=prefix+"/python/fsm_files/" fsm=[pdir+"awgn2o2_1.fsm", pdir+"awgn2o3_8ungerboecka.fsm"] uncoded_fsm=[trellis.fsm(2,2,[1,0,0,1]),trellis.fsm(3,3,[1,0,0,0,1,0,0,0,1])] bits_per_coded_symbol=[int(math.log(trellis.fsm(fsm[i]).O(),2)) for i in range(len(payload_mod))] #coding_rate=[Fraction(int(math.log(trellis.fsm(fsm[i]).I(),2)), int(math.log(trellis.fsm(fsm[i]).O(),2))) for i in range(len(fsm))] if bits_per_coded_symbol!=[payload_mod[i].bits_per_symbol() for i in range(len(payload_mod))]: print "Error in selecting trellis code and modulation pairs." print "bits_per_coded_symbol =", bits_per_coded_symbol, " for [uncoded QPSK, rate 2/3 cc &8PSK] respectively.\n" #print "coding rates for trellis codes =", coding_rate, " for [uncoded QPSK, rate 2/3 cc &8PSK] respectively.\n" #payload info payload_bytes_per_frame = 50; # set by user symbols_per_frame = 260; # symbols per frame set by user
def __init__(self, options):
gr.hier_block2.__init__(
self, "fbmc_transmit_path", gr.io_signature(0, 0, 0), gr.io_signature(1, 1, gr.sizeof_gr_complex)
)
common_options.defaults(options)
config = self.config = station_configuration()
config.data_subcarriers = options.subcarriers
config.cp_length = 0
config.frame_data_blocks = options.data_blocks
config._verbose = options.verbose
config.fft_length = options.fft_length
config.dc_null = options.dc_null
config.training_data = default_block_header(config.data_subcarriers, config.fft_length, config.dc_null, options)
config.coding = options.coding
config.fbmc = options.fbmc
config.adaptive_fbmc = options.adaptive_fbmc
config.frame_id_blocks = 1 # FIXME
# digital rms amplitude sent to USRP
rms_amp = options.rms_amplitude
self._options = copy.copy(options)
config.block_length = config.fft_length + config.cp_length
config.frame_data_part = config.frame_data_blocks + config.frame_id_blocks
config.frame_length = config.training_data.fbmc_no_preambles + 2 * config.frame_data_part
config.subcarriers = config.data_subcarriers + config.training_data.pilot_subcarriers
config.virtual_subcarriers = config.fft_length - config.subcarriers - config.dc_null
# default values if parameters not set
if rms_amp is None:
rms_amp = math.sqrt(config.subcarriers)
config.rms_amplitude = rms_amp
# check some bounds
if config.fft_length < config.subcarriers:
raise SystemError, "Subcarrier number must be less than FFT length"
if config.fft_length < config.cp_length:
raise SystemError, "Cyclic prefix length must be less than FFT length"
## shortcuts
blen = config.block_length
flen = config.frame_length
dsubc = config.data_subcarriers
vsubc = config.virtual_subcarriers
# Adaptive Transmitter Concept
used_id_bits = config.used_id_bits = 8 # TODO: no constant in source code
rep_id_bits = config.rep_id_bits = config.data_subcarriers / used_id_bits # BPSK
if config.data_subcarriers % used_id_bits <> 0:
raise SystemError, "Data subcarriers need to be multiple of %d" % (used_id_bits)
## Allocation Control
self.allocation_src = allocation_src(
config.data_subcarriers,
config.frame_data_blocks,
config.coding,
"tcp://*:3333",
"tcp://" + options.rx_hostname + ":3322",
)
if options.static_allocation: # DEBUG
# how many bits per subcarrier
if options.coding:
mode = 1 # Coding mode 1-9
bitspermode = [0.5, 1, 1.5, 2, 3, 4, 4.5, 5, 6] # Information bits per mode
modulbitspermode = [1, 2, 2, 4, 4, 6, 6, 6, 8] # Coding bits per mode
bitcount_vec = [(int)(config.data_subcarriers * config.frame_data_blocks * bitspermode[mode - 1])]
modul_bitcount_vec = [config.data_subcarriers * config.frame_data_blocks * modulbitspermode[mode - 1]]
bitcount_src = blocks.vector_source_i(bitcount_vec, True, 1)
modul_bitcount_src = blocks.vector_source_i(modul_bitcount_vec, True, 1)
bitloading = mode
else:
bitloading = 1
bitcount_vec = [config.data_subcarriers * config.frame_data_blocks * bitloading]
bitcount_src = blocks.vector_source_i(bitcount_vec, True, 1)
modul_bitcount_src = bitcount_src
# id's for frames
id_vec = range(0, 256)
id_src = blocks.vector_source_s(id_vec, True, 1)
# bitloading for ID symbol and then once for data symbols
# bitloading_vec = [1]*dsubc+[0]*(dsubc/2)+[2]*(dsubc/2)
test_allocation = (
[bitloading] * (int)(config.data_subcarriers / 8)
+ [0] * (int)(config.data_subcarriers / 4 * 3)
+ [bitloading] * (int)(config.data_subcarriers / 8)
)
# bitloading_vec = [1]*dsubc+[bitloading]*dsubc
bitloading_vec = [1] * dsubc + test_allocation
bitloading_src = blocks.vector_source_b(bitloading_vec, True, dsubc)
# bitcount for frames
# bitcount_vec = [config.data_subcarriers*config.frame_data_blocks*bitloading]
bitcount_vec = [config.frame_data_blocks * sum(test_allocation)]
bitcount_src = blocks.vector_source_i(bitcount_vec, True, 1)
# power loading, here same for all symbols
power_vec = (
[1] * (int)(config.data_subcarriers / 8)
+ [0] * (int)(config.data_subcarriers / 4 * 3)
+ [1] * (int)(config.data_subcarriers / 8)
)
power_src = blocks.vector_source_f(power_vec, True, dsubc)
# mux control stream to mux id and data bits
mux_vec = [0] * dsubc + [1] * bitcount_vec[0]
mux_ctrl = blocks.vector_source_b(mux_vec, True, 1)
else:
id_src = (self.allocation_src, 0)
bitcount_src = (self.allocation_src, 4)
bitloading_src = (self.allocation_src, 2)
power_src = (self.allocation_src, 1)
if options.coding:
modul_bitcount_src = (self.allocation_src, 5)
else:
modul_bitcount_src = bitcount_src
mux_ctrl = ofdm.tx_mux_ctrl(dsubc)
self.connect(modul_bitcount_src, mux_ctrl)
# Initial allocation
self.allocation_src.set_allocation([4] * config.data_subcarriers, [1] * config.data_subcarriers)
if options.benchmarking:
self.allocation_src.set_allocation([4] * config.data_subcarriers, [1] * config.data_subcarriers)
if options.lab_special_case:
self.allocation_src.set_allocation(
[0] * (config.data_subcarriers / 4)
+ [2] * (config.data_subcarriers / 2)
+ [0] * (config.data_subcarriers / 4),
[1] * config.data_subcarriers,
)
if options.log:
log_to_file(self, id_src, "data/id_src.short")
log_to_file(self, bitcount_src, "data/bitcount_src.int")
log_to_file(self, bitloading_src, "data/bitloading_src.char")
log_to_file(self, power_src, "data/power_src.cmplx")
## GUI probe output
zmq_probe_bitloading = zeromq.pub_sink(gr.sizeof_char, dsubc, "tcp://*:4445")
# also skip ID symbol bitloading with keep_one_in_n (side effect)
# factor 2 for bitloading because we have two vectors per frame, one for id symbol and one for all payload/data symbols
# factor config.frame_data_part for power because there is one vector per ofdm symbol per frame
self.connect(bitloading_src, blocks.keep_one_in_n(gr.sizeof_char * dsubc, 2 * 40), zmq_probe_bitloading)
zmq_probe_power = zeromq.pub_sink(gr.sizeof_float, dsubc, "tcp://*:4444")
# self.connect(power_src, blocks.keep_one_in_n(gr.sizeof_gr_complex*dsubc,40), blocks.complex_to_real(dsubc), zmq_probe_power)
self.connect(power_src, blocks.keep_one_in_n(gr.sizeof_float * dsubc, 40), zmq_probe_power)
## Workaround to avoid periodic structure
seed(1)
whitener_pn = [randint(0, 1) for i in range(used_id_bits * rep_id_bits)]
## ID Encoder
id_enc = self._id_encoder = repetition_encoder_sb(used_id_bits, rep_id_bits, whitener_pn)
self.connect(id_src, id_enc)
if options.log:
id_enc_f = gr.char_to_float()
self.connect(id_enc, id_enc_f)
log_to_file(self, id_enc_f, "data/id_enc_out.float")
## Reference Data Source
ber_ref_src = ber_reference_source(self._options)
self.connect(id_src, (ber_ref_src, 0))
self.connect(bitcount_src, (ber_ref_src, 1))
if options.log:
log_to_file(self, ber_ref_src, "data/ber_rec_src_tx.char")
if options.log:
log_to_file(self, btrig, "data/bitmap_trig.char")
## Frame Trigger
ftrig_stream = [1] + [0] * (config.frame_data_part - 1)
ftrig = self._frame_trigger = blocks.vector_source_b(ftrig_stream, True)
## Data Multiplexer
# Input 0: control stream
# Input 1: encoded ID stream
# Inputs 2..n: data streams
dmux = self._data_multiplexer = stream_controlled_mux_b()
self.connect(mux_ctrl, (dmux, 0))
self.connect(id_enc, (dmux, 1))
if options.coding:
fo = trellis.fsm(1, 2, [91, 121])
encoder = self._encoder = trellis.encoder_bb(fo, 0)
unpack = self._unpack = blocks.unpack_k_bits_bb(2)
self.connect(ber_ref_src, encoder, unpack)
if options.interleave:
int_object = trellis.interleaver(2000, 666)
interlv = trellis.permutation(int_object.K(), int_object.INTER(), 1, gr.sizeof_char)
if not options.nopunct:
bmaptrig_stream_puncturing = [1] + [0] * (config.frame_data_blocks / 2 - 1)
btrig_puncturing = self._bitmap_trigger_puncturing = blocks.vector_source_b(
bmaptrig_stream_puncturing, True
)
puncturing = self._puncturing = puncture_bb(config.data_subcarriers)
self.connect(bitloading_src, (puncturing, 1))
self.connect(self._bitmap_trigger_puncturing, (puncturing, 2))
self.connect(unpack, puncturing)
last_block = puncturing
if options.interleave:
self.connect(last_block, interlv)
last_block = interlv
if options.benchmarking:
self.connect(last_block, blocks.head(gr.sizeof_char, options.N), (dmux, 2))
else:
self.connect(last_block, (dmux, 2))
else:
if options.benchmarking:
self.connect(unpack, blocks.head(gr.sizeof_char, options.N), (dmux, 2))
else:
self.connect(unpack, (dmux, 2))
else:
if options.benchmarking:
self.connect(ber_ref_src, blocks.head(gr.sizeof_char, options.N), (dmux, 2))
else:
self.connect(ber_ref_src, (dmux, 2))
if options.log:
dmux_f = gr.char_to_float()
self.connect(dmux, dmux_f)
log_to_file(self, dmux_f, "data/dmux_out.float")
## Modulator
mod = self._modulator = generic_mapper_bcv(config.data_subcarriers, config.coding, config.frame_data_part)
self.connect(dmux, (mod, 0))
self.connect(bitloading_src, (mod, 1))
if options.log:
log_to_file(self, mod, "data/mod_out.compl")
modi = blocks.complex_to_imag(config.data_subcarriers)
modr = blocks.complex_to_real(config.data_subcarriers)
self.connect(mod, modi)
self.connect(mod, modr)
log_to_file(self, modi, "data/mod_imag_out.float")
log_to_file(self, modr, "data/mod_real_out.float")
## Power allocator
pa = self._power_allocator = multiply_frame_fc(config.frame_data_part, config.data_subcarriers)
self.connect(mod, (pa, 0))
self.connect(power_src, (pa, 1))
if options.log:
log_to_file(self, pa, "data/pa_out.compl")
if options.fbmc:
psubc = pa
else:
psubc = self._pilot_subcarrier_inserter = pilot_subcarrier_inserter()
self.connect(pa, psubc)
if options.log:
log_to_file(self, psubc, "data/psubc_out.compl")
subcarriers = config.subcarriers
# fbmc_pblocks_timing = self._fbmc_timing_pilot_block_inserter = fbmc_timing_pilot_block_inserter(5,False)
oqam_prep = self._oqam_prep = fbmc_oqam_preprocessing_vcvc(config.subcarriers, 0, 0)
self.connect(psubc, oqam_prep)
fbmc_pblocks = self._fbmc_pilot_block_inserter = fbmc_pilot_block_inserter(5, False)
self.connect(oqam_prep, fbmc_pblocks)
# log_to_file(self, fbmc_pblocks, "data/fbmc_pblocks_out.compl")
# fbmc_insert_pream = self._fbmc_insert_pream = fbmc_insert_preamble_vcvc(M, syms_per_frame, preamble)
# log_to_file(self, oqam_prep, "data/oqam_prep.compl")
# log_to_file(self, psubc, "data/psubc_out.compl")
# fbmc_pblocks = fbmc_pblocks_timing
# log_to_file(self, fbmc_pblocks, "data/fbmc_pblocks_out.compl")
beta_mult = self._beta_mult = fbmc_beta_multiplier_vcvc(config.subcarriers, 4, 4 * config.fft_length - 1, 0)
self.connect(fbmc_pblocks, beta_mult)
log_to_file(self, beta_mult, "data/beta_mult.compl")
## Add virtual subcarriers
if config.fft_length > subcarriers:
vsubc = self._virtual_subcarrier_extender = vector_padding_dc_null(
config.subcarriers, config.fft_length, config.dc_null
)
self.connect(beta_mult, vsubc)
else:
vsubc = self._virtual_subcarrier_extender = beta_mult
if options.log:
log_to_file(self, vsubc, "data/vsubc_out.compl")
## IFFT, no window, block shift
ifft = self._ifft = fft_blocks.fft_vcc(config.fft_length, False, [], True)
self.connect(vsubc, ifft)
if options.log:
log_to_file(self, ifft, "data/ifft_out.compl")
# FBMC separate stream + filterbanks
separate_oqam = self._separate_oqam = fbmc_separate_vcvc(config.fft_length, 2)
poly_netw_1 = self._poly_netw_1 = fbmc_polyphase_network_vcvc(
config.fft_length, 4, 4 * config.fft_length - 1, False
)
poly_netw_2 = self._poly_netw_2 = fbmc_polyphase_network_vcvc(
config.fft_length, 4, 4 * config.fft_length - 1, False
)
overlap_p2s = self._overlap_p2s = fbmc_overlapping_parallel_to_serial_vcc(config.fft_length)
self.connect(ifft, (separate_oqam, 0), poly_netw_1)
self.connect((separate_oqam, 1), poly_netw_2)
self.connect(poly_netw_1, (overlap_p2s, 0))
self.connect(poly_netw_2, (overlap_p2s, 1))
## Pilot blocks (preambles)
# pblocks = self._pilot_block_inserter = pilot_block_inserter2(5,False)
# self.connect( overlap_p2s, blocks.stream_to_vector(gr.sizeof_gr_complex,config.fft_length/2), pblocks )
# log_to_file(self, pblocks, "data/fbmc_pilot_block_ins_out.compl")
if options.log:
log_to_file(self, pblocks, "data/pilot_block_ins_out.compl")
## Cyclic Prefix
# cp = self._cyclic_prefixer = cyclic_prefixer(config.fft_length,
# config.block_length)
# cp= blocks.vector_to_stream(gr.sizeof_gr_complex, config.fft_length/2)
# self.connect(pblocks, cp )
# self.connect( overlap_p2s,blocks.stream_to_vector(gr.sizeof_gr_complex,config.fft_length/2), cp )
lastblock = overlap_p2s
if options.log:
log_to_file(self, overlap_p2s, "data/overlap_p2s_out.compl")
# Digital Amplifier for resource allocation
if config.adaptive_fbmc:
rep = blocks.repeat(gr.sizeof_gr_complex, config.frame_length * config.block_length)
amp = blocks.multiply_cc()
self.connect(lastblock, (amp, 0))
self.connect((self.allocation_src, 3), rep, (amp, 1))
lastblock = amp
else:
self.connect((self.allocation_src, 3), blocks.null_sink(gr.sizeof_gr_complex))
## Digital Amplifier
# amp = self._amplifier = gr.multiply_const_cc(1)
amp = self._amplifier = ofdm.multiply_const_ccf(1.0)
self.connect(lastblock, amp)
self.set_rms_amplitude(rms_amp)
# log_to_file(self, amp, "data/amp_tx_out.compl")
if options.log:
log_to_file(self, amp, "data/amp_tx_out.compl")
## Tx parameters
bandwidth = options.bandwidth or 2e6
bits = 8 * config.data_subcarriers * config.frame_data_blocks # max. QAM256
samples_per_frame = config.frame_length * config.block_length
tb = samples_per_frame / bandwidth
# set dummy carrier frequency if none available due to baseband mode
if options.tx_freq is None:
options.tx_freq = 0.0
self.tx_parameters = {
"carrier_frequency": options.tx_freq / 1e9,
"fft_size": config.fft_length,
"cp_size": config.cp_length,
"subcarrier_spacing": options.bandwidth / config.fft_length / 1e3,
"data_subcarriers": config.data_subcarriers,
"bandwidth": options.bandwidth / 1e6,
"frame_length": config.frame_length,
"symbol_time": (config.cp_length + config.fft_length) / options.bandwidth * 1e6,
"max_data_rate": (bits / tb) / 1e6,
}
## Setup Output
self.connect(amp, self)
# Display some information about the setup
if config._verbose:
self._print_verbage()
def test_004_fsm(self):
""" Test to make sure fsm works with a single state fsm."""
# Just checking that it initializes properly.
f = trellis.fsm(*fsm_args["rep2"])
def __init__(self, vlen_in=1, vlen_out=1, n_tailbits=6, denom_mother_code_rate=6, gen_poly=(91, 121, 101, 91, 121, 101), bits_per_symbol=0, N=1, map_tab=0, pp_0=0, pp_0_tail=0, pp_1=0, pp_1_tail=0, part_len_top=1, part_len_bot=1, M_total=0, interl_seq_0_2=range(2), interl_seq_1_2=range(2)): gr.hier_block2.__init__( self, "DRM MLC 16-QAM", gr.io_signature(1, 1, gr.sizeof_char*vlen_in), gr.io_signature(1, 1, gr.sizeof_gr_complex*vlen_out), ) ################################################## # Parameters ################################################## self.vlen_in = vlen_in self.vlen_out = vlen_out self.n_tailbits = n_tailbits self.denom_mother_code_rate = denom_mother_code_rate self.gen_poly = gen_poly self.bits_per_symbol = bits_per_symbol self.N = N self.map_tab = map_tab self.pp_0 = pp_0 self.pp_0_tail = pp_0_tail self.pp_1 = pp_1 self.pp_1_tail = pp_1_tail self.part_len_top = part_len_top self.part_len_bot = part_len_bot self.M_total = M_total self.interl_seq_0_2 = interl_seq_0_2 self.interl_seq_1_2 = interl_seq_1_2 ################################################## # Blocks ################################################## self.trellis_encoder_xx_0_0 = trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0) self.trellis_encoder_xx_0 = trellis.encoder_bb(trellis.fsm(1, denom_mother_code_rate, gen_poly), 0) self.gr_vector_to_stream_1_0 = gr.vector_to_stream(gr.sizeof_char*1, part_len_bot+ n_tailbits) self.gr_vector_to_stream_1 = gr.vector_to_stream(gr.sizeof_char*1, part_len_top + n_tailbits) self.gr_unpack_k_bits_bb_0_0 = gr.unpack_k_bits_bb(denom_mother_code_rate) self.gr_unpack_k_bits_bb_0 = gr.unpack_k_bits_bb(denom_mother_code_rate) self.gr_stream_to_vector_0_0 = gr.stream_to_vector(gr.sizeof_char*1, (part_len_bot + n_tailbits) * denom_mother_code_rate) self.gr_stream_to_vector_0 = gr.stream_to_vector(gr.sizeof_char*1, (part_len_top + n_tailbits) * denom_mother_code_rate) self.drm_qam_map_vbvc_0 = drm.qam_map_vbvc(map_tab, bits_per_symbol, vlen_out, 2) self.drm_punct_vbvb_0_0 = drm.punct_vbvb(pp_1, pp_1_tail, (part_len_bot + n_tailbits) * denom_mother_code_rate, vlen_out * 2, n_tailbits * denom_mother_code_rate) self.drm_punct_vbvb_0 = drm.punct_vbvb(pp_0, pp_0_tail, (part_len_top + n_tailbits) * denom_mother_code_rate, vlen_out * 2, n_tailbits * denom_mother_code_rate) self.drm_partitioning_16_vbvb_0 = drm.partitioning_vbvb(vlen_in, M_total) self.drm_interleaver_vbvb_0_0 = drm.interleaver_vbvb((interl_seq_1_2)) self.drm_interleaver_vbvb_0 = drm.interleaver_vbvb((interl_seq_0_2)) self.add_tailbits_vbvb_0_0 = drm.add_tailbits_vbvb(part_len_bot, n_tailbits) self.add_tailbits_vbvb_0 = drm.add_tailbits_vbvb(part_len_top, n_tailbits) ################################################## # Connections ################################################## self.connect((self.drm_interleaver_vbvb_0, 0), (self.drm_qam_map_vbvc_0, 0)) self.connect((self.drm_qam_map_vbvc_0, 0), (self, 0)) self.connect((self.trellis_encoder_xx_0, 0), (self.gr_unpack_k_bits_bb_0, 0)) self.connect((self.gr_stream_to_vector_0, 0), (self.drm_punct_vbvb_0, 0)) self.connect((self.gr_unpack_k_bits_bb_0, 0), (self.gr_stream_to_vector_0, 0)) self.connect((self.drm_punct_vbvb_0, 0), (self.drm_interleaver_vbvb_0, 0)) self.connect((self.trellis_encoder_xx_0_0, 0), (self.gr_unpack_k_bits_bb_0_0, 0)) self.connect((self.gr_stream_to_vector_0_0, 0), (self.drm_punct_vbvb_0_0, 0)) self.connect((self.gr_unpack_k_bits_bb_0_0, 0), (self.gr_stream_to_vector_0_0, 0)) self.connect((self.drm_punct_vbvb_0_0, 0), (self.drm_interleaver_vbvb_0_0, 0)) self.connect((self.drm_interleaver_vbvb_0_0, 0), (self.drm_qam_map_vbvc_0, 1)) self.connect((self.gr_vector_to_stream_1, 0), (self.trellis_encoder_xx_0, 0)) self.connect((self.gr_vector_to_stream_1_0, 0), (self.trellis_encoder_xx_0_0, 0)) self.connect((self, 0), (self.drm_partitioning_16_vbvb_0, 0)) self.connect((self.add_tailbits_vbvb_0, 0), (self.gr_vector_to_stream_1, 0)) self.connect((self.add_tailbits_vbvb_0_0, 0), (self.gr_vector_to_stream_1_0, 0)) self.connect((self.drm_partitioning_16_vbvb_0, 1), (self.add_tailbits_vbvb_0_0, 0)) self.connect((self.drm_partitioning_16_vbvb_0, 0), (self.add_tailbits_vbvb_0, 0))
def set_denom_mother_code_rate(self, denom_mother_code_rate):
self.denom_mother_code_rate = denom_mother_code_rate
self.trellis_encoder_xx_top_0.set_FSM(trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_top.set_FSM(trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_bot.set_FSM(trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
def __init__(self, dab_params, verbose=False, debug=False):
"""
Hierarchical block for FIC decoding
@param dab_params DAB parameter object (grdab.parameters.dab_parameters)
"""
gr.hier_block2.__init__(self, "fic",
gr.io_signature(1, 1, gr.sizeof_float * dab_params.num_carriers * 2),
gr.io_signature(1, 1, gr.sizeof_char * 32))
self.dp = dab_params
self.verbose = verbose
self.debug = debug
# FIB selection and block partitioning
self.select_fic_syms = grdab.select_vectors(gr.sizeof_float, self.dp.num_carriers * 2, self.dp.num_fic_syms, 0)
self.repartition_fic = grdab.repartition_vectors(gr.sizeof_float, self.dp.num_carriers * 2,
self.dp.fic_punctured_codeword_length, self.dp.num_fic_syms,
self.dp.num_cifs)
# unpuncturing
self.unpuncture = grdab.unpuncture_vff(self.dp.assembled_fic_puncturing_sequence, 0)
# convolutional coding
# self.fsm = trellis.fsm(self.dp.conv_code_in_bits, self.dp.conv_code_out_bits, self.dp.conv_code_generator_polynomials)
self.fsm = trellis.fsm(1, 4, [0133, 0171, 0145, 0133]) # OK (dumped to text and verified partially)
self.conv_v2s = blocks.vector_to_stream(gr.sizeof_float, self.dp.fic_conv_codeword_length)
# self.conv_decode = trellis.viterbi_combined_fb(self.fsm, 20, 0, 0, 1, [1./sqrt(2),-1/sqrt(2)] , trellis.TRELLIS_EUCLIDEAN)
table = [
0, 0, 0, 0,
0, 0, 0, 1,
0, 0, 1, 0,
0, 0, 1, 1,
0, 1, 0, 0,
0, 1, 0, 1,
0, 1, 1, 0,
0, 1, 1, 1,
1, 0, 0, 0,
1, 0, 0, 1,
1, 0, 1, 0,
1, 0, 1, 1,
1, 1, 0, 0,
1, 1, 0, 1,
1, 1, 1, 0,
1, 1, 1, 1
]
assert (len(table) / 4 == self.fsm.O())
table = [(1 - 2 * x) / sqrt(2) for x in table]
self.conv_decode = trellis.viterbi_combined_fb(self.fsm, 774, 0, 0, 4, table, trellis.TRELLIS_EUCLIDEAN)
#self.conv_s2v = blocks.stream_to_vector(gr.sizeof_char, 774)
self.conv_prune = grdab.prune(gr.sizeof_char, self.dp.fic_conv_codeword_length / 4, 0,
self.dp.conv_code_add_bits_input)
# energy dispersal
self.prbs_src = blocks.vector_source_b(self.dp.prbs(self.dp.energy_dispersal_fic_vector_length), True)
#self.energy_v2s = blocks.vector_to_stream(gr.sizeof_char, self.dp.energy_dispersal_fic_vector_length)
self.add_mod_2 = blocks.xor_bb()
self.energy_s2v = blocks.stream_to_vector(gr.sizeof_char, self.dp.energy_dispersal_fic_vector_length)
self.cut_into_fibs = grdab.repartition_vectors(gr.sizeof_char, self.dp.energy_dispersal_fic_vector_length,
self.dp.fib_bits, 1, self.dp.energy_dispersal_fic_fibs_per_vector)
# connect all
self.nullsink = blocks.null_sink(gr.sizeof_char)
self.pack = blocks.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
self.fibout = blocks.stream_to_vector(1, 32)
# self.filesink = gr.file_sink(gr.sizeof_char, "debug/fic.dat")
self.fibsink = grdab.fib_sink_vb()
# self.connect((self,0), (self.select_fic_syms,0), (self.repartition_fic,0), self.unpuncture, self.conv_v2s, self.conv_decode, self.conv_s2v, self.conv_prune, self.energy_v2s, self.add_mod_2, self.energy_s2v, (self.cut_into_fibs,0), gr.vector_to_stream(1,256), gr.unpacked_to_packed_bb(1,gr.GR_MSB_FIRST), self.filesink)
self.connect((self, 0),
(self.select_fic_syms, 0),
(self.repartition_fic, 0),
self.unpuncture,
self.conv_v2s,
self.conv_decode,
#self.conv_s2v,
self.conv_prune,
#self.energy_v2s,
self.add_mod_2,
self.energy_s2v,
(self.cut_into_fibs, 0),
blocks.vector_to_stream(1, 256),
self.pack,
self.fibout,
self.fibsink)
self.connect(self.fibout, self)
self.connect(self.prbs_src, (self.add_mod_2, 1))
if self.debug:
self.connect((self, 0), blocks.file_sink(gr.sizeof_float * self.dp.num_carriers * 2, "debug/transmission_frame.dat"))
self.connect((self, 1), blocks.file_sink(gr.sizeof_char, "debug/transmission_frame_trigger.dat"))
self.connect(self.select_fic_syms, blocks.file_sink(gr.sizeof_float * self.dp.num_carriers * 2, "debug/fic_select_syms.dat"))
self.connect(self.repartition_fic, blocks.file_sink(gr.sizeof_float * self.dp.fic_punctured_codeword_length, "debug/fic_repartitioned.dat"))
self.connect(self.unpuncture, blocks.file_sink(gr.sizeof_float * self.dp.fic_conv_codeword_length, "debug/fic_unpunctured.dat"))
self.connect(self.conv_decode, blocks.file_sink(gr.sizeof_char, "debug/fic_decoded.dat"))
self.connect(self.conv_prune, blocks.file_sink(gr.sizeof_char, "debug/fic_decoded_pruned.dat"))
#self.connect(self.conv_decode, blocks.file_sink(gr.sizeof_char * self.dp.energy_dispersal_fic_vector_length, "debug/fic_energy_dispersal_undone.dat"))
self.connect(self.pack, blocks.file_sink(gr.sizeof_char, "debug/fic_energy_undone.dat"))
def set_gen_poly(self, gen_poly):
self.gen_poly = gen_poly
self.trellis_encoder_xx_top_0.set_FSM(trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_top.set_FSM(trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
self.trellis_encoder_xx_bot.set_FSM(trellis.fsm(1, self.denom_mother_code_rate, self.gen_poly))
def __init__(self, dab_params, address, size, protection, verbose=False, debug=False):
gr.hier_block2.__init__(self,
"msc_decode",
# Input signature
gr.io_signature(1, 1, gr.sizeof_float * dab_params.num_carriers * 2),
# Output signature
gr.io_signature(1, 1, gr.sizeof_char))
self.dp = dab_params
self.address = address
self.size = size
self.protect = protection
self.verbose = verbose
self.debug = debug
# calculate n factor (multiple of 8kbits etc.)
self.n = self.size / self.dp.subch_size_multiple_n[self.protect]
# calculate puncturing factors (EEP, table 33, 34)
self.msc_I = self.n * 192
if (self.n > 1 or self.protect != 1):
self.puncturing_L1 = [6 * self.n - 3, 2 * self.n - 3, 6 * self.n - 3, 4 * self.n - 3]
self.puncturing_L2 = [3, 4 * self.n + 3, 3, 2 * self.n + 3]
self.puncturing_PI1 = [24, 14, 8, 3]
self.puncturing_PI2 = [23, 13, 7, 2]
# calculate length of punctured codeword (11.3.2)
self.msc_punctured_codeword_length = self.puncturing_L1[self.protect] * 4 * self.dp.puncturing_vectors_ones[
self.puncturing_PI1[self.protect]] + self.puncturing_L2[self.protect] * 4 * \
self.dp.puncturing_vectors_ones[
self.puncturing_PI2[self.protect]] + 12
self.assembled_msc_puncturing_sequence = self.puncturing_L1[self.protect] * 4 * self.dp.puncturing_vectors[
self.puncturing_PI1[self.protect]] + self.puncturing_L2[self.protect] * 4 * self.dp.puncturing_vectors[
self.puncturing_PI2[self.protect]] + self.dp.puncturing_tail_vector
self.msc_conv_codeword_length = 4*self.msc_I + 24 # 4*I + 24 ()
# exception in table
else:
self.msc_punctured_codeword_length = 5 * 4 * self.dp.puncturing_vectors_ones[13] + 1 * 4 * \
self.dp.puncturing_vectors_ones[
12] + 12
#sanity check
assert(6*self.n == self.puncturing_L1[self.protect] + self.puncturing_L2[self.protect])
# MSC selection and block partitioning
# select OFDM carriers with MSC
self.select_msc_syms = grdab.select_vectors(gr.sizeof_float, self.dp.num_carriers * 2, self.dp.num_msc_syms,
self.dp.num_fic_syms)
# repartition MSC data in CIFs (left out due to heavy burden for scheduler and not really necessary)
#self.repartition_msc_to_CIFs = grdab.repartition_vectors_make(gr.sizeof_float, self.dp.num_carriers * 2,
# self.dp.cif_bits, self.dp.num_msc_syms,
# self.dp.num_cifs)
#repartition MSC to CUs
self.repartition_msc_to_cus = grdab.repartition_vectors_make(gr.sizeof_float, self.dp.num_carriers*2, self.dp.msc_cu_size, self.dp.num_msc_syms, self.dp.num_cus * self.dp.num_cifs)
# select CUs of one subchannel of each CIF and form logical frame vector
self.select_subch = grdab.select_subch_vfvf_make(self.dp.msc_cu_size, self.dp.msc_cu_size * self.size, self.address, self.dp.num_cus)
# time deinterleaving
self.time_v2s = blocks.vector_to_stream_make(gr.sizeof_float, self.dp.msc_cu_size * self.size)
self.time_deinterleaver = grdab.time_deinterleave_ff_make(self.dp.msc_cu_size * self.size, self.dp.scrambling_vector)
# unpuncture
self.conv_v2s = blocks.vector_to_stream(gr.sizeof_float, self.msc_punctured_codeword_length)
self.unpuncture = grdab.unpuncture_ff_make(self.assembled_msc_puncturing_sequence, 0)
# convolutional decoding
self.fsm = trellis.fsm(1, 4, [0133, 0171, 0145, 0133]) # OK (dumped to text and verified partially)
table = [
0, 0, 0, 0,
0, 0, 0, 1,
0, 0, 1, 0,
0, 0, 1, 1,
0, 1, 0, 0,
0, 1, 0, 1,
0, 1, 1, 0,
0, 1, 1, 1,
1, 0, 0, 0,
1, 0, 0, 1,
1, 0, 1, 0,
1, 0, 1, 1,
1, 1, 0, 0,
1, 1, 0, 1,
1, 1, 1, 0,
1, 1, 1, 1
]
assert (len(table) / 4 == self.fsm.O())
table = [(1 - 2 * x) / sqrt(2) for x in table]
self.conv_decode = trellis.viterbi_combined_fb(self.fsm, self.msc_I + self.dp.conv_code_add_bits_input, 0, 0, 4, table, trellis.TRELLIS_EUCLIDEAN)
self.conv_s2v = blocks.stream_to_vector(gr.sizeof_char, self.msc_I + self.dp.conv_code_add_bits_input)
self.conv_prune = grdab.prune(gr.sizeof_char, self.msc_conv_codeword_length / 4, 0,
self.dp.conv_code_add_bits_input)
#energy descramble
self.prbs_src = blocks.vector_source_b(self.dp.prbs(self.msc_I), True)
self.energy_v2s = blocks.vector_to_stream(gr.sizeof_char, self.msc_I)
self.add_mod_2 = blocks.xor_bb()
#self.energy_s2v = blocks.stream_to_vector(gr.sizeof_char, self.msc_I)
#pack bits
self.pack_bits = blocks.unpacked_to_packed_bb_make(1, gr.GR_MSB_FIRST)
# connect blocks
self.connect((self, 0),
(self.select_msc_syms),
#(self.repartition_msc_to_CIFs, 0),
(self.repartition_msc_to_cus),
(self.select_subch, 0),
#(self.repartition_cus_to_logical_frame, 0),
self.time_v2s,
self.time_deinterleaver,
#self.conv_v2s,
self.unpuncture,
self.conv_decode,
#self.conv_s2v,
self.conv_prune,
#self.energy_v2s,
self.add_mod_2,
self.pack_bits,
#self.energy_s2v, #better output stream or vector??
(self))
self.connect(self.prbs_src, (self.add_mod_2, 1))
#debug
if debug is True:
#msc_select_syms
self.sink_msc_select_syms = blocks.file_sink_make(gr.sizeof_float * self.dp.num_carriers * 2, "debug/msc_select_syms.dat")
self.connect(self.select_msc_syms, self.sink_msc_select_syms)
#msc repartition cus
self.sink_repartition_msc_to_cus = blocks.file_sink_make(gr.sizeof_float * self.dp.msc_cu_size, "debug/msc_repartitioned_to_cus.dat")
self.connect((self.repartition_msc_to_cus), self.sink_repartition_msc_to_cus)
#data of one sub channel not decoded
self.sink_select_subch = blocks.file_sink_make(gr.sizeof_float * self.dp.msc_cu_size * self.size, "debug/select_subch.dat")
self.connect(self.select_subch, self.sink_select_subch)
#sub channel time_deinterleaved
self.sink_subch_time_deinterleaved = blocks.file_sink_make(gr.sizeof_float, "debug/subch_time_deinterleaved.dat")
self.connect(self.time_deinterleaver, self.sink_subch_time_deinterleaved)
#sub channel unpunctured
self.sink_subch_unpunctured = blocks.file_sink_make(gr.sizeof_float, "debug/subch_unpunctured.dat")
self.connect(self.unpuncture, self.sink_subch_unpunctured)
# sub channel convolutional decoded
self.sink_subch_decoded = blocks.file_sink_make(gr.sizeof_char, "debug/subch_decoded.dat")
self.connect(self.conv_decode, self.sink_subch_decoded)
# sub channel convolutional decoded
self.sink_subch_pruned = blocks.file_sink_make(gr.sizeof_char, "debug/subch_pruned.dat")
self.connect(self.conv_prune, self.sink_subch_pruned)
# sub channel energy dispersal undone unpacked
self.sink_subch_energy_disp_undone = blocks.file_sink_make(gr.sizeof_char, "debug/subch_energy_disp_undone_unpacked.dat")
self.connect(self.add_mod_2, self.sink_subch_energy_disp_undone)
# sub channel energy dispersal undone packed
self.sink_subch_energy_disp_undone_packed = blocks.file_sink_make(gr.sizeof_char, "debug/subch_energy_disp_undone_packed.dat")
self.connect(self.pack_bits, self.sink_subch_energy_disp_undone_packed)
def run_test(seed,blocksize):
tb = gr.top_block()
##################################################
# Variables
##################################################
M = 2
K = 1
P = 2
h = (1.0*K)/P
L = 3
Q = 4
frac = 0.99
f = trellis.fsm(P,M,L)
# CPFSK signals
#p = numpy.ones(Q)/(2.0)
#q = numpy.cumsum(p)/(1.0*Q)
# GMSK signals
BT=0.3;
tt=numpy.arange(0,L*Q)/(1.0*Q)-L/2.0;
#print tt
p=(0.5*scipy.special.erfc(2*math.pi*BT*(tt-0.5)/math.sqrt(math.log(2.0))/math.sqrt(2.0))-0.5*scipy.special.erfc(2*math.pi*BT*(tt+0.5)/math.sqrt(math.log(2.0))/math.sqrt(2.0)))/2.0;
p=p/sum(p)*Q/2.0;
#print p
q=numpy.cumsum(p)/Q;
q=q/q[-1]/2.0;
#print q
(f0T,SS,S,F,Sf,Ff,N) = fsm_utils.make_cpm_signals(K,P,M,L,q,frac)
#print N
#print Ff
Ffa = numpy.insert(Ff,Q,numpy.zeros(N),axis=0)
#print Ffa
MF = numpy.fliplr(numpy.transpose(Ffa))
#print MF
E = numpy.sum(numpy.abs(Sf)**2,axis=0)
Es = numpy.sum(E)/f.O()
#print Es
constellation = numpy.reshape(numpy.transpose(Sf),N*f.O())
#print Ff
#print Sf
#print constellation
#print numpy.max(numpy.abs(SS - numpy.dot(Ff , Sf)))
EsN0_db = 10.0
N0 = Es * 10.0**(-(1.0*EsN0_db)/10.0)
#N0 = 0.0
#print N0
head = 4
tail = 4
numpy.random.seed(seed*666)
data = numpy.random.randint(0, M, head+blocksize+tail+1)
#data = numpy.zeros(blocksize+1+head+tail,'int')
for i in range(head):
data[i]=0
for i in range(tail+1):
data[-i]=0
##################################################
# Blocks
##################################################
random_source_x_0 = blocks.vector_source_b(data.tolist(), False)
digital_chunks_to_symbols_xx_0 = digital.chunks_to_symbols_bf((-1, 1), 1)
filter_interp_fir_filter_xxx_0 = filter.interp_fir_filter_fff(Q, p)
analog_frequency_modulator_fc_0 = analog.frequency_modulator_fc(2*math.pi*h*(1.0/Q))
blocks_add_vxx_0 = blocks.add_vcc(1)
analog_noise_source_x_0 = analog.noise_source_c(analog.GR_GAUSSIAN, (N0/2.0)**0.5, -long(seed))
blocks_multiply_vxx_0 = blocks.multiply_vcc(1)
analog_sig_source_x_0 = analog.sig_source_c(Q, analog.GR_COS_WAVE, -f0T, 1, 0)
# only works for N=2, do it manually for N>2...
filter_fir_filter_xxx_0_0 = filter.fir_filter_ccc(Q, MF[0].conjugate())
filter_fir_filter_xxx_0_0_0 = filter.fir_filter_ccc(Q, MF[1].conjugate())
blocks_streams_to_stream_0 = blocks.streams_to_stream(gr.sizeof_gr_complex*1, int(N))
blocks_skiphead_0 = blocks.skiphead(gr.sizeof_gr_complex*1, int(N*(1+0)))
viterbi = trellis.viterbi_combined_cb(f, head+blocksize+tail, 0, -1, int(N),
constellation, digital.TRELLIS_EUCLIDEAN)
blocks_vector_sink_x_0 = blocks.vector_sink_b()
##################################################
# Connections
##################################################
tb.connect((random_source_x_0, 0), (digital_chunks_to_symbols_xx_0, 0))
tb.connect((digital_chunks_to_symbols_xx_0, 0), (filter_interp_fir_filter_xxx_0, 0))
tb.connect((filter_interp_fir_filter_xxx_0, 0), (analog_frequency_modulator_fc_0, 0))
tb.connect((analog_frequency_modulator_fc_0, 0), (blocks_add_vxx_0, 0))
tb.connect((analog_noise_source_x_0, 0), (blocks_add_vxx_0, 1))
tb.connect((blocks_add_vxx_0, 0), (blocks_multiply_vxx_0, 0))
tb.connect((analog_sig_source_x_0, 0), (blocks_multiply_vxx_0, 1))
tb.connect((blocks_multiply_vxx_0, 0), (filter_fir_filter_xxx_0_0, 0))
tb.connect((blocks_multiply_vxx_0, 0), (filter_fir_filter_xxx_0_0_0, 0))
tb.connect((filter_fir_filter_xxx_0_0, 0), (blocks_streams_to_stream_0, 0))
tb.connect((filter_fir_filter_xxx_0_0_0, 0), (blocks_streams_to_stream_0, 1))
tb.connect((blocks_streams_to_stream_0, 0), (blocks_skiphead_0, 0))
tb.connect((blocks_skiphead_0, 0), (viterbi, 0))
tb.connect((viterbi, 0), (blocks_vector_sink_x_0, 0))
tb.run()
dataest = blocks_vector_sink_x_0.data()
#print data
#print numpy.array(dataest)
perr = 0
err = 0
for i in range(blocksize):
if data[head+i] != dataest[head+i]:
#print i
err += 1
if err != 0 :
perr = 1
return (err,perr)
#tcm_indicator_symbols_per_frame=4; #Zhe added, 4 bits are used as tcm mode indicator, it is used as a part of header.
# Achilles' comment: this may change later when filler bits are introduced...
print "bits_per_header=", bits_per_header
print "symbols_per_header=", symbols_per_header
#print "tcm_indicator_symbols_per_frame=",tcm_indicator_symbols_per_frame
print "\n"
#trellis coding and modulation info
payload_mod = [digital.constellation_qpsk(), digital.constellation_8psk()]
pdir = prefix + "/python/fsm_files/"
fsm = [pdir + "awgn2o2_1.fsm", pdir + "awgn2o3_8ungerboecka.fsm"]
uncoded_fsm = [
trellis.fsm(2, 2, [1, 0, 0, 1]),
trellis.fsm(3, 3, [1, 0, 0, 0, 1, 0, 0, 0, 1])
]
bits_per_coded_symbol = [
int(math.log(trellis.fsm(fsm[i]).O(), 2)) for i in range(len(payload_mod))
]
#coding_rate=[Fraction(int(math.log(trellis.fsm(fsm[i]).I(),2)), int(math.log(trellis.fsm(fsm[i]).O(),2))) for i in range(len(fsm))]
if bits_per_coded_symbol != [
payload_mod[i].bits_per_symbol() for i in range(len(payload_mod))
]:
print "Error in selecting trellis code and modulation pairs."
print "bits_per_coded_symbol =", bits_per_coded_symbol, " for [uncoded QPSK, rate 2/3 cc &8PSK] respectively.\n"
def __init__(self,
vlen_in=1,
vlen_out=1,
n_tailbits=6,
denom_mother_code_rate=6,
gen_poly=(91, 121, 101, 91, 121, 101),
bits_per_symbol=0,
N=1,
map_tab=0,
pp_0=0,
pp_0_tail=0,
pp_1=0,
pp_1_tail=0,
part_len_top=1,
part_len_bot=1,
M_total=0,
interl_seq_0_2=range(2),
interl_seq_1_2=range(2)):
gr.hier_block2.__init__(
self,
"DRM MLC 16-QAM",
gr.io_signature(1, 1, gr.sizeof_char * vlen_in),
gr.io_signature(1, 1, gr.sizeof_gr_complex * vlen_out),
)
##################################################
# Parameters
##################################################
self.vlen_in = vlen_in
self.vlen_out = vlen_out
self.n_tailbits = n_tailbits
self.denom_mother_code_rate = denom_mother_code_rate
self.gen_poly = gen_poly
self.bits_per_symbol = bits_per_symbol
self.N = N
self.map_tab = map_tab
self.pp_0 = pp_0
self.pp_0_tail = pp_0_tail
self.pp_1 = pp_1
self.pp_1_tail = pp_1_tail
self.part_len_top = part_len_top
self.part_len_bot = part_len_bot
self.M_total = M_total
self.interl_seq_0_2 = interl_seq_0_2
self.interl_seq_1_2 = interl_seq_1_2
##################################################
# Blocks
##################################################
self.trellis_encoder_xx_0_0 = trellis.encoder_bb(
trellis.fsm(1, denom_mother_code_rate, gen_poly), 0)
self.trellis_encoder_xx_0 = trellis.encoder_bb(
trellis.fsm(1, denom_mother_code_rate, gen_poly), 0)
self.gr_vector_to_stream_1_0 = gr.vector_to_stream(
gr.sizeof_char * 1, part_len_bot + n_tailbits)
self.gr_vector_to_stream_1 = gr.vector_to_stream(
gr.sizeof_char * 1, part_len_top + n_tailbits)
self.gr_unpack_k_bits_bb_0_0 = gr.unpack_k_bits_bb(
denom_mother_code_rate)
self.gr_unpack_k_bits_bb_0 = gr.unpack_k_bits_bb(
denom_mother_code_rate)
self.gr_stream_to_vector_0_0 = gr.stream_to_vector(
gr.sizeof_char * 1,
(part_len_bot + n_tailbits) * denom_mother_code_rate)
self.gr_stream_to_vector_0 = gr.stream_to_vector(
gr.sizeof_char * 1,
(part_len_top + n_tailbits) * denom_mother_code_rate)
self.drm_qam_map_vbvb_0 = drm.qam_map_vbvb(map_tab, bits_per_symbol,
vlen_out, 2)
self.drm_punct_vbvb_0_0 = drm.punct_vbvb(
pp_1, pp_1_tail,
(part_len_bot + n_tailbits) * denom_mother_code_rate, vlen_out * 2,
n_tailbits * denom_mother_code_rate)
self.drm_punct_vbvb_0 = drm.punct_vbvb(
pp_0, pp_0_tail,
(part_len_top + n_tailbits) * denom_mother_code_rate, vlen_out * 2,
n_tailbits * denom_mother_code_rate)
self.drm_partitioning_16_vbvb_0 = drm.partitioning_vbvb(
vlen_in, M_total)
self.drm_interleaver_vbvb_0_0 = drm.interleaver_vbvb((interl_seq_1_2))
self.drm_interleaver_vbvb_0 = drm.interleaver_vbvb((interl_seq_0_2))
self.add_tailbits_vbvb_0_0 = drm.add_tailbits_vbvb(
part_len_bot, n_tailbits)
self.add_tailbits_vbvb_0 = drm.add_tailbits_vbvb(
part_len_top, n_tailbits)
##################################################
# Connections
##################################################
self.connect((self.drm_interleaver_vbvb_0, 0),
(self.drm_qam_map_vbvb_0, 0))
self.connect((self.drm_qam_map_vbvb_0, 0), (self, 0))
self.connect((self.trellis_encoder_xx_0, 0),
(self.gr_unpack_k_bits_bb_0, 0))
self.connect((self.gr_stream_to_vector_0, 0),
(self.drm_punct_vbvb_0, 0))
self.connect((self.gr_unpack_k_bits_bb_0, 0),
(self.gr_stream_to_vector_0, 0))
self.connect((self.drm_punct_vbvb_0, 0),
(self.drm_interleaver_vbvb_0, 0))
self.connect((self.trellis_encoder_xx_0_0, 0),
(self.gr_unpack_k_bits_bb_0_0, 0))
self.connect((self.gr_stream_to_vector_0_0, 0),
(self.drm_punct_vbvb_0_0, 0))
self.connect((self.gr_unpack_k_bits_bb_0_0, 0),
(self.gr_stream_to_vector_0_0, 0))
self.connect((self.drm_punct_vbvb_0_0, 0),
(self.drm_interleaver_vbvb_0_0, 0))
self.connect((self.drm_interleaver_vbvb_0_0, 0),
(self.drm_qam_map_vbvb_0, 1))
self.connect((self.gr_vector_to_stream_1, 0),
(self.trellis_encoder_xx_0, 0))
self.connect((self.gr_vector_to_stream_1_0, 0),
(self.trellis_encoder_xx_0_0, 0))
self.connect((self, 0), (self.drm_partitioning_16_vbvb_0, 0))
self.connect((self.add_tailbits_vbvb_0, 0),
(self.gr_vector_to_stream_1, 0))
self.connect((self.add_tailbits_vbvb_0_0, 0),
(self.gr_vector_to_stream_1_0, 0))
self.connect((self.drm_partitioning_16_vbvb_0, 1),
(self.add_tailbits_vbvb_0_0, 0))
self.connect((self.drm_partitioning_16_vbvb_0, 0),
(self.add_tailbits_vbvb_0, 0))
#tcm_indicator_symbols_per_frame=4; #Zhe added, 4 bits are used as tcm mode indicator, it is used as a part of header.
# Achilles' comment: this may change later when filler bits are introduced...
print "bits_per_header=", bits_per_header
print "symbols_per_header=", symbols_per_header
#print "tcm_indicator_symbols_per_frame=",tcm_indicator_symbols_per_frame
print "\n"
#trellis coding and modulation info
payload_mod = [digital.constellation_qpsk(), digital.constellation_8psk()]
pdir = prefix + "/python/fsm_files/"
fsm = [pdir + "awgn2o2_1.fsm", pdir + "awgn2o3_8ungerboecka.fsm"]
uncoded_fsm = [
trellis.fsm(2, 2, [1, 0, 0, 1]),
trellis.fsm(3, 3, [1, 0, 0, 0, 1, 0, 0, 0, 1])
]
bits_per_coded_symbol = [
int(math.log(trellis.fsm(fsm[i]).O(), 2)) for i in range(len(payload_mod))
]
#coding_rate=[Fraction(int(math.log(trellis.fsm(fsm[i]).I(),2)), int(math.log(trellis.fsm(fsm[i]).O(),2))) for i in range(len(fsm))]
if bits_per_coded_symbol != [
payload_mod[i].bits_per_symbol() for i in range(len(payload_mod))
]:
print "Error in selecting trellis code and modulation pairs."
print "bits_per_coded_symbol =", bits_per_coded_symbol, " for [uncoded QPSK, rate 2/3 cc &8PSK] respectively.\n"
def set_prefix(self, prefix):
self.prefix = prefix
self.set_fsm(trellis.fsm(self.prefix + "diff_manchester.fsm"))
def __init__(self):
grc_wxgui.top_block_gui.__init__(self, title="Dvbs Tx")
##################################################
# Variables
##################################################
self.symbol_rate = symbol_rate = 4500000
self.samp_rate = samp_rate = symbol_rate * 2
self.rrc_taps = rrc_taps = 20
##################################################
# Blocks
##################################################
self.wxgui_fftsink2_0 = fftsink2.fft_sink_c(
self.GetWin(),
baseband_freq=435000000,
y_per_div=10,
y_divs=10,
ref_level=0,
ref_scale=2.0,
sample_rate=samp_rate,
fft_size=1024,
fft_rate=15,
average=True,
avg_alpha=None,
title="FFT Plot",
peak_hold=False,
)
self.Add(self.wxgui_fftsink2_0.win)
self.trellis_encoder_xx_0 = trellis.encoder_bb(trellis.fsm(1, 2, (0171, 0133)), 0)
self.osmosdr_sink_0 = osmosdr.sink( args="numchan=" + str(1) + " " + "" )
self.osmosdr_sink_0.set_sample_rate(samp_rate)
self.osmosdr_sink_0.set_center_freq(435e6, 0)
self.osmosdr_sink_0.set_freq_corr(0, 0)
self.osmosdr_sink_0.set_gain(2, 0)
self.osmosdr_sink_0.set_if_gain(0, 0)
self.osmosdr_sink_0.set_bb_gain(-4, 0)
self.osmosdr_sink_0.set_antenna("", 0)
self.osmosdr_sink_0.set_bandwidth(6000000, 0)
self.fft_filter_xxx_0 = filter.fft_filter_ccc(1, (firdes.root_raised_cosine(1.79, samp_rate, samp_rate/2, 0.35, rrc_taps)), 1)
self.fft_filter_xxx_0.declare_sample_delay(0)
self.dvbs_reed_solomon_enc_bb_0 = dvbs.reed_solomon_enc_bb()
self.dvbs_randomizer_bb_0 = dvbs.randomizer_bb()
self.dvbs_puncture_bb_0 = dvbs.puncture_bb(dvbs.C1_2)
self.dvbs_modulator_bc_0 = dvbs.modulator_bc()
self.dvbs_interleaver_bb_0 = dvbs.interleaver_bb()
self.blocks_unpack_k_bits_bb_0 = blocks.unpack_k_bits_bb(2)
self.blocks_packed_to_unpacked_xx_0 = blocks.packed_to_unpacked_bb(1, gr.GR_MSB_FIRST)
self.blocks_pack_k_bits_bb_0 = blocks.pack_k_bits_bb(2)
self.blocks_file_source_0 = blocks.file_source(gr.sizeof_char*1, "/home/re/xfer/adv.ts", False)
##################################################
# Connections
##################################################
self.connect((self.blocks_file_source_0, 0), (self.dvbs_randomizer_bb_0, 0))
self.connect((self.dvbs_randomizer_bb_0, 0), (self.dvbs_reed_solomon_enc_bb_0, 0))
self.connect((self.dvbs_reed_solomon_enc_bb_0, 0), (self.dvbs_interleaver_bb_0, 0))
self.connect((self.dvbs_interleaver_bb_0, 0), (self.blocks_packed_to_unpacked_xx_0, 0))
self.connect((self.blocks_packed_to_unpacked_xx_0, 0), (self.trellis_encoder_xx_0, 0))
self.connect((self.trellis_encoder_xx_0, 0), (self.blocks_unpack_k_bits_bb_0, 0))
self.connect((self.blocks_unpack_k_bits_bb_0, 0), (self.dvbs_puncture_bb_0, 0))
self.connect((self.dvbs_puncture_bb_0, 0), (self.blocks_pack_k_bits_bb_0, 0))
self.connect((self.dvbs_modulator_bc_0, 0), (self.fft_filter_xxx_0, 0))
self.connect((self.blocks_pack_k_bits_bb_0, 0), (self.dvbs_modulator_bc_0, 0))
self.connect((self.fft_filter_xxx_0, 0), (self.osmosdr_sink_0, 0))
self.connect((self.fft_filter_xxx_0, 0), (self.wxgui_fftsink2_0, 0))
def set_fsm(self, fsm):
self.fsm = fsm
self.trellis_viterbi_x_0.set_FSM(trellis.fsm(self.fsm))
def __init__(self, samp_rate=512e3):
gr.hier_block2.__init__(
self,
"RDS demodulator",
gr.io_signaturev(
2, 2, [gr.sizeof_gr_complex * 1, gr.sizeof_gr_complex * 1]),
gr.io_signaturev(2, 2,
[gr.sizeof_char * 1, gr.sizeof_gr_complex * 1]),
)
##################################################
# Parameters
##################################################
self.samp_rate = samp_rate
##################################################
# Variables
##################################################
self.bitrate = bitrate = 1187.5
self.syms_rate = syms_rate = 2 * bitrate
self.samp_per_sym = samp_per_sym = 4
self.prefix = prefix = "radio/"
self.variable_constellation_0 = variable_constellation_0 = digital.constellation_bpsk(
).base()
self.fsm = fsm = trellis.fsm(prefix + "diff_manchester.fsm")
self.decim = decim = int(samp_rate / (samp_per_sym * syms_rate))
self.RRC_filtr_taps = RRC_filtr_taps = firdes.root_raised_cosine(
10, samp_rate, syms_rate, 1, int(6 * samp_rate / syms_rate))
##################################################
# Blocks
##################################################
self.trellis_viterbi_x_0 = trellis.viterbi_b(trellis.fsm(fsm), 10000,
0, -1)
self.trellis_metrics_x_0 = trellis.metrics_c(
fsm.O(), 2, (-1, -1, -1, 1, 1, -1, 1, 1),
digital.TRELLIS_EUCLIDEAN)
self.fir_filter_xxx_0 = filter.fir_filter_ccf(decim, (RRC_filtr_taps))
self.fir_filter_xxx_0.declare_sample_delay(0)
self.digital_lms_dd_equalizer_cc_0_0 = digital.lms_dd_equalizer_cc(
1, 0.1, 1, variable_constellation_0)
self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_cc(
samp_rate / decim / syms_rate, 0.25 * 0.175 * 0.175, 0.5, 0.175,
0.005)
self.blocks_multiply_xx_1 = blocks.multiply_vcc(1)
##################################################
# Connections
##################################################
self.connect((self.blocks_multiply_xx_1, 0),
(self.fir_filter_xxx_0, 0))
self.connect((self.digital_clock_recovery_mm_xx_0, 0),
(self.digital_lms_dd_equalizer_cc_0_0, 0))
self.connect((self.digital_lms_dd_equalizer_cc_0_0, 0), (self, 1))
self.connect((self.digital_lms_dd_equalizer_cc_0_0, 0),
(self.trellis_metrics_x_0, 0))
self.connect((self.fir_filter_xxx_0, 0),
(self.digital_clock_recovery_mm_xx_0, 0))
self.connect((self, 0), (self.blocks_multiply_xx_1, 1))
self.connect((self, 1), (self.blocks_multiply_xx_1, 0))
self.connect((self.trellis_metrics_x_0, 0),
(self.trellis_viterbi_x_0, 0))
self.connect((self.trellis_viterbi_x_0, 0), (self, 0))
######################################################################
# C test channel (J. Proakis, Digital Communications, McGraw-Hill Inc., 2001)
c_channel = [0.227, 0.460, 0.688, 0.460, 0.227]
if __name__ == '__main__':
f1=trellis.fsm('fsm_files/awgn1o2_4.fsm')
#f2=trellis.fsm('fsm_files/awgn2o3_4.fsm')
#print f1.I(), f1.S(), f1.O()
#print f1.NS()
#print f1.OS()
#print f2.I(), f2.S(), f2.O()
#print f2.NS()
#print f2.OS()
##f1.write_trellis_svg('f1.svg',4)
#f2.write_trellis_svg('f2.svg',4)
#f=fsm_concatenate(f1,f2)
#f=fsm_radix(f1,2)
#print "----------\n"
#print f.I(), f.S(), f.O()
#print f.NS()