def gen_framer_info(modulation):
mods = {
"bpsk": 2,
"qpsk": 4,
"8psk": 8,
"qam8": 8,
"qam16": 16,
"qam64": 64,
"qam256": 256
}
arity = mods[modulation]
rot = 1
if modulation == "qpsk":
rot = (0.707 + 0.707j)
# FIXME: pass the constellation objects instead of just the points
if (modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif (modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
return rotated_const
def gen_framer_info(modulation):
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[modulation]
rot = 1
if modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
return rotated_const
def __init__(self, options, msgq_limit=2, pad_for_usrp=True, coder=None):
"""
Hierarchical block for sending packets
Packets to be sent are enqueued by calling send_pkt.
The output is the complex modulated signal at baseband.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param msgq_limit: maximum number of messages in message queue
@type msgq_limit: int
@param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples
"""
gr.hier_block2.__init__(self, "ofdm_mod",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self.coder = coder
self._pad_for_usrp = pad_for_usrp
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._pkt_accum = None
self._accumulated_pkts = 0
win = [] #[1 for i in range(self._fft_length)]
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq,)
padded_preambles = list()
for pre in preambles:
padded = self._fft_length*[0,]
padded[zeros_on_left : zeros_on_left + self._occupied_tones] = pre
padded_preambles.append(padded)
symbol_length = options.fft_length + options.cp_length
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
self._pkt_input = digital_swig.ofdm_mapper_bcv(rotated_const,
msgq_limit,
options.occupied_tones,
options.fft_length)
self.preambles = digital_swig.ofdm_insert_preamble(self._fft_length,
padded_preambles)
self.ifft = gr.fft_vcc(self._fft_length, False, win, True)
self.cp_adder = digital_swig.ofdm_cyclic_prefixer(self._fft_length,
symbol_length)
self.scale = gr.multiply_const_cc(1.0 / math.sqrt(self._fft_length))
self.connect((self._pkt_input, 0), (self.preambles, 0))
self.connect((self._pkt_input, 1), (self.preambles, 1))
self.connect(self.preambles, self.ifft, self.cp_adder, self.scale, self)
if options.verbose:
self._print_verbage()
if options.log:
self.connect(self._pkt_input, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_mapper_c.dat"))
self.connect(self.preambles, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_preambles.dat"))
self.connect(self.ifft, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_ifft_c.dat"))
self.connect(self.cp_adder, gr.file_sink(gr.sizeof_gr_complex,
"ofdm_cp_adder_c.dat"))
def __init__(self, options, callback=None, coder=None):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param callback: function of two args: ok, payload
@type callback: ok: bool; payload: string
"""
gr.hier_block2.__init__(self, "ofdm_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
self.coder = coder
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._snr = options.snr
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq,)
symbol_length = self._fft_length + self._cp_length
self.ofdm_recv = ofdm_receiver(self._fft_length,
self._cp_length,
self._occupied_tones,
self._snr, preambles,
options.log)
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
phgain = 0.25
frgain = phgain*phgain / 4.0
self.ofdm_demod = digital_swig.ofdm_frame_sink(rotated_const, range(arity),
self._rcvd_pktq,
self._occupied_tones,
phgain, frgain)
self.connect(self, self.ofdm_recv)
self.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0))
self.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1))
# added output signature to work around bug, though it might not be a bad
# thing to export, anyway
self.connect(self.ofdm_recv.chan_filt, self)
if options.log:
self.connect(self.ofdm_demod,
gr.file_sink(gr.sizeof_gr_complex*self._occupied_tones,
"ofdm_frame_sink_c.dat"))
else:
self.connect(self.ofdm_demod,
gr.null_sink(gr.sizeof_gr_complex*self._occupied_tones))
if options.verbose:
self._print_verbage()
self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback, self.coder)
def __init__(self, options, msgq_limit=2, pad_for_usrp=True):
"""
Hierarchical block for sending packets
Packets to be sent are enqueued by calling send_pkt.
The output is the complex modulated signal at baseband.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param msgq_limit: maximum number of messages in message queue
@type msgq_limit: int
@param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples
"""
gr.hier_block2.__init__(
self,
"ofdm_mod",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._pad_for_usrp = pad_for_usrp
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._carrier_map = options.carrier_map # linklab
self._nc_filter = options.nc_filter # linklab
win = [] #[1 for i in range(self._fft_length)]
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(
math.ceil((self._fft_length - self._occupied_tones) / 2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if ((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq, )
padded_preambles = list()
for pre in preambles:
padded = self._fft_length * [
0,
]
padded[zeros_on_left:zeros_on_left + self._occupied_tones] = pre
padded_preambles.append(padded)
# linklab, sanity check: check carrier_map
if ((4 * len(self._carrier_map) != self._occupied_tones) &
(self._carrier_map != 'FFFF')):
print(
"Error: --carrier-map size %d is no equal to # of --occupied-tones"
) % (4 * (len(self._carrier_map)))
raise SystemExit
# check occupied_tones and cp_length
if ((self._fft_length < self._occupied_tones) |
(self._fft_length < self._cp_length)):
print(
"Error: --occupied-tones or --cp-length specified must not biger than --fft-length"
)
raise SystemExit
# linklab, get subcarrier allocation from carrier_map
self.calc_carrier_map(self._carrier_map)
symbol_length = options.fft_length + options.cp_length
mods = {
"bpsk": 2,
"qpsk": 4,
"8psk": 8,
"qam8": 8,
"qam16": 16,
"qam64": 64,
"qam256": 256
}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707 + 0.707j)
# FIXME: pass the constellation objects instead of just the points
if (self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif (self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
self._pkt_input = gr_papyrus.ofdm_mapper_bcv(rotated_const, msgq_limit,
options.occupied_tones,
options.fft_length,
self._carrier_map)
self.preambles = gr_papyrus.ofdm_insert_preamble(
self._fft_length, padded_preambles)
if VERBOSE:
print "%s:%s" % (os.path.basename(__file__), __name__)
print "**** (ofdm_mod) padded_preamble", padded_preambles
self.ifft = fft.fft_vcc(self._fft_length, False, win, True)
self.cp_adder = digital.ofdm_cyclic_prefixer(self._fft_length,
symbol_length)
self.scale = blocks.multiply_const_cc(1.0 /
math.sqrt(self._fft_length))
self.connect((self._pkt_input, 0), (self.preambles, 0))
self.connect((self._pkt_input, 1), (self.preambles, 1))
self.connect(self.preambles, self.ifft, self.cp_adder, self.scale,
self)
if options.verbose:
self._print_verbage()
if options.log:
self.connect(
self._pkt_input,
gr.file_sink(gr.sizeof_gr_complex * options.fft_length,
"ofdm_mapper_c.dat"))
self.connect(
self.preambles,
gr.file_sink(gr.sizeof_gr_complex * options.fft_length,
"ofdm_preambles.dat"))
self.connect(
self.ifft,
gr.file_sink(gr.sizeof_gr_complex * options.fft_length,
"ofdm_ifft_c.dat"))
self.connect(
self.cp_adder,
gr.file_sink(gr.sizeof_gr_complex, "ofdm_cp_adder_c.dat"))
def __init__(self, options, callback=None):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param callback: function of two args: ok, payload
@type callback: ok: bool; payload: string
"""
gr.hier_block2.__init__(
self,
"ofdm_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._snr = options.snr
self._carrier_map = options.carrier_map # linklab
self._nc_filter = options.nc_filter # linklab
# linklab, sanity check carrier_map
if ((4 * len(self._carrier_map) != self._occupied_tones) &
(self._carrier_map != 'FFFF')):
print(
"Error: --carrier-map size %d is no equal to # of --occupied-tones"
) % (4 * (len(self._carrier_map)))
raise SystemExit
# check occupied_tones and cp_length
if ((self._fft_length < self._occupied_tones) |
(self._fft_length < self._cp_length)):
print(
"Error: --occupied-tones or --cp-length specified must not biger than --fft-length"
)
raise SystemExit
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(
math.ceil((self._fft_length - self._occupied_tones) / 2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if ((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq, )
# linklab, get subcarrier allocation from carrier_map
self.calc_carrier_map(self._carrier_map)
symbol_length = self._fft_length + self._cp_length
# linklab, add carrier_map_bin
symbol_length = self._fft_length + self._cp_length
self.ofdm_recv = ofdm_receiver(
self._fft_length,
self._cp_length,
self._occupied_tones,
self._snr,
preambles,
self._carrier_map_bin,
self._nc_filter, #linklab
options.log)
if VERBOSE:
print "%s:%s" % (os.path.basename(__file__), __name__)
print "(ofdm_demod) preambles= ", preambles
mods = {
"bpsk": 2,
"qpsk": 4,
"8psk": 8,
"qam8": 8,
"qam16": 16,
"qam64": 64,
"qam256": 256
}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707 + 0.707j)
# FIXME: pass the constellation objects instead of just the points
if (self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif (self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
phgain = 0.25
frgain = phgain * phgain / 4.0
self.ofdm_demod = gr_papyrus.ofdm_frame_sink(
rotated_const, range(arity), self._rcvd_pktq, self._fft_length,
self._occupied_tones, self._carrier_map_bin_str, phgain, frgain)
self.connect(self, self.ofdm_recv)
self.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0))
self.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1))
# added output signature to work around bug, though it might not be a bad
# thing to export, anyway
self.connect(self.ofdm_recv.chan_filt, self)
if options.log:
self.connect(
self.ofdm_demod,
gr.file_sink(gr.sizeof_gr_complex * self._occupied_tones,
"ofdm_frame_sink_c.dat"))
else:
self.connect(
self.ofdm_demod,
blocks.null_sink(gr.sizeof_gr_complex * self._occupied_tones))
if options.verbose:
self._print_verbage()
# linklab, add ofdm_recv to queue watcher
#self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback),
self._watcher = _queue_watcher_thread(self._rcvd_pktq, self.ofdm_recv,
callback)
def __init__(self, options, msgq_limit=2, pad_for_usrp=True):
"""
Hierarchical block for sending packets
Packets to be sent are enqueued by calling send_pkt.
The output is the complex modulated signal at baseband.
Args:
options: pass modulation options from higher layers (fft length, occupied tones, etc.)
msgq_limit: maximum number of messages in message queue (int)
pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples
"""
gr.hier_block2.__init__(self, "ofdm_mod",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._pad_for_usrp = pad_for_usrp
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
win = [] #[1 for i in range(self._fft_length)]
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq,)
padded_preambles = list()
for pre in preambles:
padded = self._fft_length*[0,]
padded[zeros_on_left : zeros_on_left + self._occupied_tones] = pre
padded_preambles.append(padded)
symbol_length = options.fft_length + options.cp_length
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
self._pkt_input = digital.ofdm_mapper_bcv(rotated_const,
msgq_limit,
options.occupied_tones,
options.fft_length)
self.preambles = digital.ofdm_insert_preamble(self._fft_length,
padded_preambles)
self.ifft = fft.fft_vcc(self._fft_length, False, win, True)
self.cp_adder = digital.ofdm_cyclic_prefixer(self._fft_length,
symbol_length)
self.scale = blocks.multiply_const_cc(1.0 / math.sqrt(self._fft_length))
# self.connect((self._pkt_input, 0), (self.preambles, 0))
# self.connect((self._pkt_input, 1), (self.preambles, 1))
# self.connect(self.preambles, self.ifft, self.cp_adder, self.scale, self)
self.nuller = blocks.null_sink(gr.sizeof_char)
self.v2s = blocks.vector_to_stream(gr.sizeof_gr_complex*1,self._fft_length)
self.connect((self._pkt_input, 0), self.v2s, self)
self.connect((self._pkt_input, 1), self.nuller)
if options.verbose:
self._print_verbage()
if options.log:
self.connect(self._pkt_input, blocks.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_mapper_c.dat"))
self.connect(self.preambles, blocks.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_preambles.dat"))
self.connect(self.ifft, blocks.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_ifft_c.dat"))
self.connect(self.cp_adder, blocks.file_sink(gr.sizeof_gr_complex,
"ofdm_cp_adder_c.dat"))
def __init__(self, options, num_channels, callback=None):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
Args:
options: pass modulation options from higher layers (fft length, occupied tones, etc.)
callback: function of two args: ok, payload (ok: bool; payload: string)
"""
self.rx_channels = num_channels#len(options.args.split(','))
gr.hier_block2.__init__(self, "ofdm_demod",
gr.io_signaturev(self.rx_channels, self.rx_channels, gen_multiple_ios(self.rx_channels,1) ), # Input signature
gr.io_signaturev(self.rx_channels, self.rx_channels, gen_multiple_ios(self.rx_channels,options.occupied_tones) ))
#[gr.sizeof_gr_complex*options.occupied_tones, gr.sizeof_gr_complex*options.occupied_tones])) # Output signature
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY from all receive channels
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._snr = options.snr
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq,)
symbol_length = self._fft_length + self._cp_length
self.ofdm_recv = ofdm_receiver(self.rx_channels, self._fft_length,
self._cp_length,
self._occupied_tones,
self._snr, preambles,
options.log)
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
phgain = 0.25
frgain = phgain*phgain / 4.0
# self.ofdm_demod = ofdm.ofdm_frame_sink(rotated_const, range(arity),self._rcvd_pktq,self._occupied_tones,phgain, frgain, 3)
self.ofdm_demod = ofdm.ofdm_mrx_frame_sink(rotated_const, range(arity),self._rcvd_pktq,self._occupied_tones,phgain, frgain, self.rx_channels)
self.mdb = blocks.message_debug()
############# CONNECTIONS ##############
# Connect ofdm_receiver flag to ofdm framer flag
self.connect((self.ofdm_recv, 1), (self.ofdm_demod, 0)) # Connect flag from 1st chain only
# Connect frame sink msg port to debugger
self.msg_connect((self.ofdm_demod, 'packet'), (self.mdb,'print'))
# Connect remaining data ports
port = 0
for c in range(self.rx_channels):
# Connect USRP's to channel filters
self.connect((self,c), (self.ofdm_recv,c))
# Add null sink
object_name_ns = 'null_sink_'+str(c)
setattr(self, object_name_ns, blocks.null_sink(gr.sizeof_char*1))
# Connect ofdm_receiver to ofdm framer
self.connect((self.ofdm_recv, port), (self.ofdm_demod, c+1)) # Occupied tones
# Connect extra port(s) to null since we dont need it now
self.connect((self.ofdm_recv, port+1), (getattr(self,object_name_ns), 0))
port = port + 2
# Connect equalized signals to output
self.connect((self.ofdm_demod, c), (self, c))
# added output signature to work around bug, though it might not be a bad
# thing to export, anyway
# self.connect(self.ofdm_recv.chan_filt, (self,0))
############## ##############
if options.log:
self.connect(self.ofdm_demod,
blocks.file_sink(gr.sizeof_gr_complex*self._occupied_tones,
"ofdm_frame_sink_c.dat"))
else:
self.connect(self.ofdm_demod,
blocks.null_sink(gr.sizeof_gr_complex*self._occupied_tones))
if options.verbose:
self._print_verbage()
self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback)
def __init__(self, options, callback=None):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param callback: function of two args: ok, payload
@type callback: ok: bool; payload: string
"""
gr.hier_block2.__init__(
self,
"ofdm_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature2(2, 2, gr.sizeof_gr_complex,
gr.sizeof_float)) # Output signature
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._snr = options.snr
self._use_coding = options.coding
self._coding_block_length = options.block_length
self._adaptive_coding_enabled = options.adaptive_coding
self._rfcenterfreq = options.rx_freq
self._bandwidth = options.my_bandwidth
self._logging = lincolnlog.LincolnLog(__name__)
self._expected_pkt_size = options.expected_pkt_size
self._vcsthresh = options.vcsthresh
# if backoff is negative, calculate backoff value from options.expected_pkt_size
if options.backoff < 0:
self._vcsbackoff = predict_pack_size(
self._expected_pkt_size, self._use_coding, self._modulation,
self._occupied_tones, self._cp_length, self._fft_length)
# otherwise use the value in options.backoff
else:
self._vcsbackoff = options.backoff
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(
math.ceil((self._fft_length - self._occupied_tones) / 2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if ((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq, )
symbol_length = self._fft_length + self._cp_length
self.ofdm_recv = ofdm_receiver(self._fft_length, self._cp_length,
self._occupied_tones, self._snr,
preambles, self._vcsthresh,
self._vcsbackoff, options.log,
options.coding)
mods = {
"bpsk": 2,
"qpsk": 4,
"8psk": 8,
"qam8": 8,
"qam16": 16,
"qam64": 64,
"qam256": 256
}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707 + 0.707j)
# FIXME: pass the constellation objects instead of just the points
if (self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif (self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
phgain = 0.25
frgain = phgain * phgain / 4.0
self.ofdm_demod = digital_ll.ofdm_frame_sink(rotated_const,
range(arity),
self._rcvd_pktq,
self._occupied_tones,
phgain, frgain)
self.nsink = gr.null_sink(gr.sizeof_float)
self.connect(self, self.ofdm_recv)
self.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0))
self.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1))
# Output the VCS signal so that the MAC layer knows when the
# channel is occupied
#self.connect((self.ofdm_recv, 2), gr.null_sink(gr.sizeof_float))
self.connect((self.ofdm_recv, 2), (self, 1))
# added output signature to work around bug, though it might not be a bad
# thing to export, anyway
self.connect(self.ofdm_recv.chan_filt, (self, 0))
if options.log:
self.connect(
self.ofdm_demod,
gr.file_sink(gr.sizeof_gr_complex * self._occupied_tones,
"ofdm_frame_sink_c.dat"))
else:
self.connect(
self.ofdm_demod,
gr.null_sink(gr.sizeof_gr_complex * self._occupied_tones))
if options.verbose:
self._print_verbage()
self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback,
self._use_coding,
self._coding_block_length,
self._adaptive_coding_enabled,
self._rfcenterfreq,
self._bandwidth, self._logging)
def __init__(self, options, msgq_limit=2, pad_for_usrp=True):
"""
Hierarchical block for sending packets
Packets to be sent are enqueued by calling send_pkt.
The output is the complex modulated signal at baseband.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param msgq_limit: maximum number of messages in message queue
@type msgq_limit: int
@param pad_for_usrp: If true, packets are padded such that they end up a multiple of 128 samples
"""
gr.hier_block2.__init__(self, "ofdm_mod",
gr.io_signature(0, 0, 0), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._pad_for_usrp = pad_for_usrp
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._carrier_map = options.carrier_map # linklab
self._nc_filter = options.nc_filter # linklab
win = [] #[1 for i in range(self._fft_length)]
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq,)
padded_preambles = list()
for pre in preambles:
padded = self._fft_length*[0,]
padded[zeros_on_left : zeros_on_left + self._occupied_tones] = pre
padded_preambles.append(padded)
# linklab, sanity check: check carrier_map
if ((4*len(self._carrier_map) != self._occupied_tones) & (self._carrier_map != 'FFFF')):
print("Error: --carrier-map size %d is no equal to # of --occupied-tones") %(4*(len(self._carrier_map)))
raise SystemExit
# check occupied_tones and cp_length
if ((self._fft_length < self._occupied_tones) | (self._fft_length < self._cp_length)):
print("Error: --occupied-tones or --cp-length specified must not biger than --fft-length")
raise SystemExit
# linklab, get subcarrier allocation from carrier_map
self.calc_carrier_map(self._carrier_map)
symbol_length = options.fft_length + options.cp_length
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
self._pkt_input = gr_papyrus.ofdm_mapper_bcv(rotated_const,
msgq_limit,
options.occupied_tones,
options.fft_length,self._carrier_map)
self.preambles = gr_papyrus.ofdm_insert_preamble(self._fft_length,
padded_preambles)
if VERBOSE:
print "%s:%s" %(os.path.basename(__file__), __name__)
print "**** (ofdm_mod) padded_preamble", padded_preambles
self.ifft = fft.fft_vcc(self._fft_length, False, win, True)
self.cp_adder = digital.ofdm_cyclic_prefixer(self._fft_length,
symbol_length)
self.scale = blocks.multiply_const_cc(1.0 / math.sqrt(self._fft_length))
self.connect((self._pkt_input, 0), (self.preambles, 0))
self.connect((self._pkt_input, 1), (self.preambles, 1))
self.connect(self.preambles, self.ifft, self.cp_adder, self.scale, self)
if options.verbose:
self._print_verbage()
if options.log:
self.connect(self._pkt_input, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_mapper_c.dat"))
self.connect(self.preambles, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_preambles.dat"))
self.connect(self.ifft, gr.file_sink(gr.sizeof_gr_complex*options.fft_length,
"ofdm_ifft_c.dat"))
self.connect(self.cp_adder, gr.file_sink(gr.sizeof_gr_complex,
"ofdm_cp_adder_c.dat"))
def __init__(self, options, callback=None):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param callback: function of two args: ok, payload
@type callback: ok: bool; payload: string
"""
gr.hier_block2.__init__(self, "ofdm_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._snr = options.snr
self._carrier_map = options.carrier_map # linklab
self._nc_filter = options.nc_filter # linklab
# linklab, sanity check carrier_map
if ((4*len(self._carrier_map) != self._occupied_tones) & (self._carrier_map != 'FFFF')):
print("Error: --carrier-map size %d is no equal to # of --occupied-tones") %(4*(len(self._carrier_map)))
raise SystemExit
# check occupied_tones and cp_length
if ((self._fft_length < self._occupied_tones) | (self._fft_length < self._cp_length)):
print("Error: --occupied-tones or --cp-length specified must not biger than --fft-length")
raise SystemExit
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq,)
# linklab, get subcarrier allocation from carrier_map
self.calc_carrier_map(self._carrier_map)
symbol_length = self._fft_length + self._cp_length
# linklab, add carrier_map_bin
symbol_length = self._fft_length + self._cp_length
self.ofdm_recv = ofdm_receiver(self._fft_length,
self._cp_length,
self._occupied_tones,
self._snr, preambles,
self._carrier_map_bin,
self._nc_filter, #linklab
options.log)
if VERBOSE:
print "%s:%s" %(os.path.basename(__file__), __name__)
print "(ofdm_demod) preambles= ", preambles
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
phgain = 0.25
frgain = phgain*phgain / 4.0
self.ofdm_demod = gr_papyrus.ofdm_frame_sink(rotated_const, range(arity),
self._rcvd_pktq,
self._fft_length,
self._occupied_tones,
self._carrier_map_bin_str,
phgain, frgain)
self.connect(self, self.ofdm_recv)
self.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0))
self.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1))
# added output signature to work around bug, though it might not be a bad
# thing to export, anyway
self.connect(self.ofdm_recv.chan_filt, self)
if options.log:
self.connect(self.ofdm_demod,
gr.file_sink(gr.sizeof_gr_complex*self._occupied_tones,
"ofdm_frame_sink_c.dat"))
else:
self.connect(self.ofdm_demod,
blocks.null_sink(gr.sizeof_gr_complex*self._occupied_tones))
if options.verbose:
self._print_verbage()
# linklab, add ofdm_recv to queue watcher
#self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback),
self._watcher = _queue_watcher_thread(self._rcvd_pktq, self.ofdm_recv, callback)
def __init__(self, options, callback=None):
"""
Hierarchical block for demodulating and deframing packets.
The input is the complex modulated signal at baseband.
Demodulated packets are sent to the handler.
@param options: pass modulation options from higher layers (fft length, occupied tones, etc.)
@param callback: function of two args: ok, payload
@type callback: ok: bool; payload: string
"""
gr.hier_block2.__init__(self, "ofdm_demod",
gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature
gr.io_signature2(2, 2, gr.sizeof_gr_complex, gr.sizeof_float)) # Output signature
self._rcvd_pktq = gr.msg_queue() # holds packets from the PHY
self._modulation = options.modulation
self._fft_length = options.fft_length
self._occupied_tones = options.occupied_tones
self._cp_length = options.cp_length
self._snr = options.snr
self._use_coding = options.coding
self._coding_block_length = options.block_length
self._adaptive_coding_enabled = options.adaptive_coding
self._rfcenterfreq = options.rx_freq
self._bandwidth = options.my_bandwidth
self._logging = lincolnlog.LincolnLog(__name__)
self._expected_pkt_size = options.expected_pkt_size
self._vcsthresh = options.vcsthresh
# if backoff is negative, calculate backoff value from options.expected_pkt_size
if options.backoff < 0:
self._vcsbackoff = predict_pack_size( self._expected_pkt_size, self._use_coding, self._modulation, self._occupied_tones, self._cp_length, self._fft_length )
# otherwise use the value in options.backoff
else:
self._vcsbackoff = options.backoff
# Use freq domain to get doubled-up known symbol for correlation in time domain
zeros_on_left = int(math.ceil((self._fft_length - self._occupied_tones)/2.0))
ksfreq = known_symbols_4512_3[0:self._occupied_tones]
for i in range(len(ksfreq)):
if((zeros_on_left + i) & 1):
ksfreq[i] = 0
# hard-coded known symbols
preambles = (ksfreq,)
symbol_length = self._fft_length + self._cp_length
self.ofdm_recv = ofdm_receiver(self._fft_length,
self._cp_length,
self._occupied_tones,
self._snr, preambles,
self._vcsthresh,
self._vcsbackoff,
options.log, options.coding)
mods = {"bpsk": 2, "qpsk": 4, "8psk": 8, "qam8": 8, "qam16": 16, "qam64": 64, "qam256": 256}
arity = mods[self._modulation]
rot = 1
if self._modulation == "qpsk":
rot = (0.707+0.707j)
# FIXME: pass the constellation objects instead of just the points
if(self._modulation.find("psk") >= 0):
constel = psk.psk_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
elif(self._modulation.find("qam") >= 0):
constel = qam.qam_constellation(arity)
rotated_const = map(lambda pt: pt * rot, constel.points())
#print rotated_const
phgain = 0.25
frgain = phgain*phgain / 4.0
self.ofdm_demod = digital_ll.ofdm_frame_sink(rotated_const, range(arity),
self._rcvd_pktq,
self._occupied_tones,
phgain, frgain)
self.nsink = gr.null_sink(gr.sizeof_float)
self.connect(self, self.ofdm_recv)
self.connect((self.ofdm_recv, 0), (self.ofdm_demod, 0))
self.connect((self.ofdm_recv, 1), (self.ofdm_demod, 1))
# Output the VCS signal so that the MAC layer knows when the
# channel is occupied
#self.connect((self.ofdm_recv, 2), gr.null_sink(gr.sizeof_float))
self.connect((self.ofdm_recv, 2), (self, 1))
# added output signature to work around bug, though it might not be a bad
# thing to export, anyway
self.connect(self.ofdm_recv.chan_filt, (self,0))
if options.log:
self.connect(self.ofdm_demod,
gr.file_sink(gr.sizeof_gr_complex*self._occupied_tones,
"ofdm_frame_sink_c.dat"))
else:
self.connect(self.ofdm_demod,
gr.null_sink(gr.sizeof_gr_complex*self._occupied_tones))
if options.verbose:
self._print_verbage()
self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback, self._use_coding, self._coding_block_length, self._adaptive_coding_enabled,
self._rfcenterfreq,self._bandwidth,self._logging)