def test_001_t (self): # set up fg test_len = 1000 packet_len = test_len pulse_send = (200,300,100) pulse_wait = (100,100) amplitude = 0.5 num_skip = 5 # skip samples with skiphead num_xcorr = 300 # num of xcorrs to determine delay samples src = radar.signal_generator_sync_pulse_c(packet_len,pulse_send,pulse_wait,amplitude,"packet_len") head = blocks.head(8,test_len) skiphead = blocks.skiphead(8,num_skip) est = radar.estimator_sync_pulse_c(num_xcorr,"packet_len") res = radar.print_results() debug = blocks.message_debug() self.tb.connect(src,skiphead,head) self.tb.connect((head,0),(est,0)) # TX stream (undelayed but skiped) self.tb.connect((src,0),(est,1)) # RX stream (delayed but unskiped) self.tb.msg_connect(est,'Msg out',res,'Msg in') self.tb.msg_connect(est,'Msg out',debug,'store') self.tb.run () # check data msg = debug.get_message(0) num_skip_est = pmt.to_long(pmt.nth(1,pmt.nth(1,msg))) self.assertEqual(num_skip_est,num_skip)
def handle_reset_frequency(self, msg_pmt):
self.center_frequency = pmt.to_long(msg_pmt)
##################################################
# Blocks
##################################################
self.receiving_phy_0 = receiving_phy(
block_id=block_id,
constellation=constellation,
develop_mode=develop_mode,
matched_filter_coeff=matched_filter_coeff,
mu=mu,
preamble=preamble,
rx_gain=rx_gain,
samp_rate=samp_rate,
sps=sps,
threshold=threshold,
usrp_device_address=usrp_device_address,
center_frequency=center_frequency,
)
self.msg_connect((self.receiving_phy_0, 'rx_frame_out'),
(self, 'rx_frame_out'))
self.msg_connect((self.receiving_phy_0, 'snr_out'), (self, 'snr_out'))
self.msg_connect((self.receiving_phy_0, 'rx_power_out'),
(self, 'rx_power_out'))
self.msg_connect((self, 'rx_switch_in'),
(self.receiving_phy_0, 'rx_switch_in'))
def count_bursts(data, tags, tsb_tag_key, vlen=1):
lengthtags = [t for t in tags
if pmt.symbol_to_string(t.key) == tsb_tag_key]
lengths = {}
for tag in lengthtags:
if tag.offset in lengths:
raise ValueError(
"More than one tags with key {0} with the same offset={1}."
.format(tsb_tag_key, tag.offset))
lengths[tag.offset] = pmt.to_long(tag.value)*vlen
in_burst = False
in_packet = False
packet_length = None
packet_pos = None
burst_count = 0
for pos in range(len(data)):
if pos in lengths:
if in_packet:
print("Got tag at pos {0} current packet_pos is {1}".format(pos, packet_pos))
raise Exception("Received packet tag while in packet.")
packet_pos = -1
packet_length = lengths[pos]
in_packet = True
if not in_burst:
burst_count += 1
in_burst = True
elif not in_packet:
in_burst = False
if in_packet:
packet_pos += 1
if packet_pos == packet_length-1:
in_packet = False
packet_pos = None
return burst_count
def count_bursts(data, tags, lengthtagname, vlen=1):
lengthtags = [t for t in tags
if pmt.symbol_to_string(t.key) == lengthtagname]
lengths = {}
for tag in lengthtags:
if tag.offset in lengths:
raise ValueError(
"More than one tags with key {0} with the same offset={1}."
.format(lengthtagname, tag.offset))
lengths[tag.offset] = pmt.to_long(tag.value)*vlen
in_burst = False
in_packet = False
packet_length = None
packet_pos = None
burst_count = 0
for pos in range(len(data)):
if pos in lengths:
if in_packet:
print("Got tag at pos {0} current packet_pos is {1}".format(pos, packet_pos))
raise StandardError("Received packet tag while in packet.")
packet_pos = -1
packet_length = lengths[pos]
in_packet = True
if not in_burst:
burst_count += 1
in_burst = True
elif not in_packet:
in_burst = False
if in_packet:
packet_pos += 1
if packet_pos == packet_length-1:
in_packet = False
packet_pos = None
return burst_count
def write_data(self, msg):
snr = pmt.to_double(pmt.dict_ref(msg, pmt.intern("snr"), pmt.from_double(0)))
encoding = pmt.to_long(pmt.dict_ref(msg, pmt.intern("encoding"), pmt.from_long(0)))
time_now = time() * 1000
delay = str(time_now - self.last_time)
self.last_time = time_now
if self.snr_file != "":
f_snr = open(self.snr_file, 'a')
f_snr.write(str(snr) + '\n')
f_snr.close()
if self.enc_file != "":
f_enc = open(self.enc_file, 'a')
f_enc.write(str(encoding) + '\n')
f_enc.close()
if self.delay_file != "":
f_delay = open(self.delay_file, 'a')
f_delay.write(delay + '\n')
f_delay.close()
if self.debug:
print("SNR:" + str(snr))
print("Encoding:" + str(encoding))
print("Delay in millis: " + delay)
def test14(self):
const = self.MAXINT32 - 1
x_pmt = pmt.from_long(const)
s = pmt.serialize_str(x_pmt)
deser = pmt.deserialize_str(s)
self.assertTrue(pmt.equal(x_pmt, deser))
self.assertEqual(const,pmt.to_long(deser))
def nodeid_handler_method(self, msg):
self.nodeid = pmt.to_long(msg)
pmt_to_send = pmt.make_dict()
attributes = pmt.make_dict()
attributes = pmt.dict_add(attributes, pmt.string_to_symbol("nodeID"),
pmt.from_long(self.nodeid))
attributes = pmt.dict_add(attributes, pmt.string_to_symbol("nodeMac"),
pmt.intern(self.mac))
attributes = pmt.dict_add(attributes, pmt.string_to_symbol("nodeIp"),
pmt.intern(self.ip))
attributes = pmt.dict_add(attributes, pmt.string_to_symbol("latitude"),
pmt.from_double(self.latitude))
attributes = pmt.dict_add(attributes,
pmt.string_to_symbol("longitude"),
pmt.from_double(self.longitude))
attributes = pmt.dict_add(attributes, pmt.string_to_symbol("nodeType"),
pmt.from_long(1))
command = pmt.make_dict()
command = pmt.dict_add(command, pmt.string_to_symbol("attributes"),
attributes)
pmt_to_send = pmt.dict_add(pmt_to_send,
pmt.string_to_symbol("NodeParam"), command)
serialized_pmt = pmt.serialize_str(pmt_to_send)
#print pmt_to_send
UDP_IP = self.host
UDP_PORT = self.port
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(serialized_pmt, (UDP_IP, UDP_PORT))
def test_003_frame_detect(self):
alpha = 3.
average_len = 8
frame_len = 25
backoff_len = 4
tag_key = 'enertest'
# set up fg
detector = gfdm.frame_energy_detector_cc(alpha, average_len, frame_len, backoff_len, tag_key)
data = np.zeros(100)
data[50:] = 100
src = blocks.vector_source_c(data)
snk = blocks.vector_sink_c()
self.tb.connect(src, detector, snk)
self.tb.run()
# check data
res = np.array(snk.data())
tags = snk.tags()
for t in tags:
print 'srcid {}, key {}, offset {}, value {}'.format(t.srcid, t.key, t.offset, t.value)
p = tags[0].offset
self.assertEqual(p, 0)
v = pmt.to_long(tags[0].value)
fl = frame_len + 2 * backoff_len
self.assertEqual(int(v), int(fl))
self.assertComplexTuplesAlmostEqual(res, data[44:44 + len(res)])
def test_001b_shifted (self):
""" Same as before, but shifted, because that's the normal mode in OFDM Rx """
fft_len = 16
tx_symbols = (
0, 0, 0, 0, 0, 0, 1, 2, 0, 3, 4, 5, 0, 0, 0, 0,
0, 0, 0, 0, 6, 1j, 7, 8, 0, 9, 10, 1j, 11, 0, 0, 0,
0, 0, 0, 0, 0, 12, 13, 14, 0, 15, 16, 17, 0, 0, 0, 0,
)
expected_result = tuple(range(18))
occupied_carriers = ((13, 14, 15, 1, 2, 3), (-4, -2, -1, 1, 2, 4),)
n_syms = len(tx_symbols)/fft_len
tag_name = "len"
tag = gr.tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(n_syms)
src = blocks.vector_source_c(tx_symbols, False, fft_len, (tag,))
serializer = digital.ofdm_serializer_vcc(fft_len, occupied_carriers, tag_name)
sink = blocks.vector_sink_c()
self.tb.connect(src, serializer, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_result)
self.assertEqual(len(sink.tags()), 1)
result_tag = sink.tags()[0]
self.assertEqual(pmt.symbol_to_string(result_tag.key), tag_name)
self.assertEqual(pmt.to_long(result_tag.value), n_syms * len(occupied_carriers[0]))
def test_003_channel_no_carroffset(self):
""" Add a channel, check if it's correctly estimated """
fft_len = 16
carr_offset = 0
sync_symbol1 = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
sync_symbol2 = (0, 0, 0, 1j, -1, 1, -1j, 1j, 0, 1, -1j, -1, -1j, 1, 0,
0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = sync_symbol1 + sync_symbol2 + data_symbol
channel = (0, 0, 0, 2, -2, 2, 3j, 2, 0, 2, 2, 2, 2, 3, 0, 0)
src = blocks.vector_source_c(tx_data, False, fft_len)
chan = blocks.multiply_const_vcc(channel)
chanest = digital.ofdm_chanest_vcvc(sync_symbol1, sync_symbol2, 1)
sink = blocks.vector_sink_c(fft_len)
sink_chanest = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chan, chanest, sink)
self.tb.connect((chanest, 1), sink_chanest)
self.tb.run()
tags = sink.tags()
self.assertEqual(shift_tuple(sink.data(), -carr_offset),
tuple(numpy.multiply(data_symbol, channel)))
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_chan_taps':
self.assertEqual(pmt.c32vector_elements(tag.value), channel)
self.assertEqual(sink_chanest.data(), channel)
def run_flow_graph(sync_sym1, sync_sym2, data_sym):
top_block = gr.top_block()
carr_offset = random.randint(-max_offset/2, max_offset/2) * 2
tx_data = shift_tuple(sync_sym1, carr_offset) + \
shift_tuple(sync_sym2, carr_offset) + \
shift_tuple(data_sym, carr_offset)
channel = [rand_range(min_chan_ampl, max_chan_ampl) * numpy.exp(1j * rand_range(0, 2 * numpy.pi)) for x in range(fft_len)]
src = blocks.vector_source_c(tx_data, False, fft_len)
chan = blocks.multiply_const_vcc(channel)
noise = analog.noise_source_c(analog.GR_GAUSSIAN, wgn_amplitude)
add = blocks.add_cc(fft_len)
chanest = digital.ofdm_chanest_vcvc(sync_sym1, sync_sym2, 1)
sink = blocks.vector_sink_c(fft_len)
top_block.connect(src, chan, (add, 0), chanest, sink)
top_block.connect(noise, blocks.stream_to_vector(gr.sizeof_gr_complex, fft_len), (add, 1))
top_block.run()
channel_est = None
carr_offset_hat = 0
rx_sym_est = [0,] * fft_len
tags = sink.tags()
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
carr_offset_hat = pmt.to_long(tag.value)
self.assertEqual(carr_offset, carr_offset_hat)
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_chan_taps':
channel_est = shift_tuple(pmt.c32vector_elements(tag.value), carr_offset)
shifted_carrier_mask = shift_tuple(carrier_mask, carr_offset)
for i in range(fft_len):
if shifted_carrier_mask[i] and channel_est[i]:
self.assertAlmostEqual(channel[i], channel_est[i], places=0)
rx_sym_est[i] = (sink.data()[i] / channel_est[i]).real
return (carr_offset, list(shift_tuple(rx_sym_est, -carr_offset_hat)))
def test_001_t(self):
# set up fg
test_len = 1000
packet_len = test_len
pulse_send = (200, 300, 100)
pulse_wait = (100, 100)
amplitude = 0.5
num_skip = 5 # skip samples with skiphead
num_xcorr = 300 # num of xcorrs to determine delay samples
src = radar.signal_generator_sync_pulse_c(packet_len, pulse_send,
pulse_wait, amplitude,
"packet_len")
head = blocks.head(8, test_len)
skiphead = blocks.skiphead(8, num_skip)
est = radar.estimator_sync_pulse_c(num_xcorr, "packet_len")
res = radar.print_results()
debug = blocks.message_debug()
self.tb.connect(src, skiphead, head)
self.tb.connect((head, 0),
(est, 0)) # TX stream (undelayed but skiped)
self.tb.connect((src, 0), (est, 1)) # RX stream (delayed but unskiped)
self.tb.msg_connect(est, 'Msg out', res, 'Msg in')
self.tb.msg_connect(est, 'Msg out', debug, 'store')
self.tb.run()
# check data
msg = debug.get_message(0)
num_skip_est = pmt.to_long(pmt.nth(1, pmt.nth(1, msg)))
self.assertEqual(num_skip_est, num_skip)
def test_005_long_frame(self):
alpha = 3.
average_len = 32
frame_len = 5000
backoff_len = 2 * average_len
tag_key = 'enertest'
# set up fg
detector = gfdm.frame_energy_detector_cc(alpha, average_len, frame_len, backoff_len, tag_key)
test_frame = np.zeros(frame_len + 2 * backoff_len)
test_frame[backoff_len:-backoff_len] = 100.
data = np.zeros(10 * frame_len)
p = 6 * average_len
data[p:p + len(test_frame)] = test_frame
src = blocks.vector_source_c(data)
snk = blocks.vector_sink_c()
self.tb.connect(src, detector, snk)
self.tb.run()
# check data
res = np.array(snk.data())
# make sure output is a multiple of average_len!
tags = snk.tags()
for t in tags:
print 'srcid {}, key {}, offset {}, value {}'.format(t.srcid, t.key, t.offset, t.value)
p = tags[0].offset
self.assertEqual(p, 0)
v = pmt.to_long(tags[0].value)
fl = frame_len + 2 * backoff_len
self.assertEqual(int(v), int(fl))
self.assertComplexTuplesAlmostEqual(res[0:len(test_frame)], test_frame)
def handle_msg(self, msg): if(pmt.is_tuple(msg)): t = pmt.to_long(pmt.tuple_ref(msg, 0)) m = pmt.symbol_to_string(pmt.tuple_ref(msg, 1)) de = DataEvent([t, m]) wx.PostEvent(self.panel, de) del de
def vectors_to_packets(data, tags, tsb_tag_key, vlen=1):
lengthtags = [t for t in tags
if pmt.symbol_to_string(t.key) == tsb_tag_key]
lengths = {}
for tag in lengthtags:
if tag.offset in lengths:
raise ValueError(
"More than one tags with key {0} with the same offset={1}."
.format(tsb_tag_key, tag.offset))
lengths[tag.offset] = pmt.to_long(tag.value)*vlen
if 0 not in lengths:
raise ValueError("There is no tag with key {0} and an offset of 0"
.format(tsb_tag_key))
pos = 0
packets = []
while pos < len(data):
if pos not in lengths:
raise ValueError("There is no tag with key {0} and an offset of {1}."
"We were expecting one."
.format(tsb_tag_key, pos))
length = lengths[pos]
if length == 0:
raise ValueError("Packets cannot have zero length.")
if pos+length > len(data):
raise ValueError("The final packet is incomplete.")
packets.append(data[pos: pos+length])
pos += length
return packets
def test_006_channel_and_carroffset (self):
""" Add a channel, check if it's correctly estimated """
fft_len = 16
carr_offset = 2
# Index 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
sync_symbol1 = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
sync_symbol2 = (0, 0, 0, 1j, -1, 1, -1j, 1j, 0, 1, -1j, -1, -1j, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
# Channel 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
# Shifted (0, 0, 0, 0, 0, 1j, -1, 1, -1j, 1j, 0, 1, -1j, -1, -1j, 1)
chanest_exp = (0, 0, 0, 5, 6, 7, 8, 9, 0, 11, 12, 13, 14, 15, 0, 0)
tx_data = shift_tuple(sync_symbol1, carr_offset) + \
shift_tuple(sync_symbol2, carr_offset) + \
shift_tuple(data_symbol, carr_offset)
channel = range(fft_len)
src = blocks.vector_source_c(tx_data, False, fft_len)
chan = blocks.multiply_const_vcc(channel)
chanest = digital.ofdm_chanest_vcvc(sync_symbol1, sync_symbol2, 1)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chan, chanest, sink)
self.tb.run()
tags = sink.tags()
chan_est = None
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_chan_taps':
chan_est = pmt.c32vector_elements(tag.value)
self.assertEqual(chan_est, chanest_exp)
self.assertEqual(sink.data(), tuple(numpy.multiply(shift_tuple(data_symbol, carr_offset), channel)))
def test_004_channel_no_carroffset_1sym (self):
""" Add a channel, check if it's correctly estimated.
Only uses 1 synchronisation symbol. """
fft_len = 16
carr_offset = 0
sync_symbol = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = sync_symbol + data_symbol
channel = (0, 0, 0, 2, 2, 2, 2, 3, 3, 2.5, 2.5, -3, -3, 1j, 1j, 0)
#channel = (0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0)
src = blocks.vector_source_c(tx_data, False, fft_len)
chan = blocks.multiply_const_vcc(channel)
chanest = digital.ofdm_chanest_vcvc(sync_symbol, (), 1)
sink = blocks.vector_sink_c(fft_len)
sink_chanest = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chan, chanest, sink)
self.tb.connect((chanest, 1), sink_chanest)
self.tb.run()
self.assertEqual(sink_chanest.data(), channel)
tags = sink.tags()
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_chan_taps':
self.assertEqual(pmt.c32vector_elements(tag.value), channel)
def test14(self):
const = self.MAXINT32 - 1
x_pmt = pmt.from_long(const)
s = pmt.serialize_str(x_pmt)
deser = pmt.deserialize_str(s)
self.assertTrue(pmt.equal(x_pmt, deser))
self.assertEqual(const, pmt.to_long(deser))
def test_005_packet_len_tag (self):
""" Standard test """
fft_len = 16
tx_symbols = range(1, 16);
tx_symbols = (0, 1, 1j, 2, 3, 0, 0, 0, 0, 0, 0, 4, 5, 2j, 6, 0,
0, 7, 8, 3j, 9, 0, 0, 0, 0, 0, 0, 10, 4j, 11, 12, 0,
0, 13, 1j, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 2j, 0, 0)
expected_result = tuple(range(1, 16))
occupied_carriers = ((1, 3, 4, 11, 12, 14), (1, 2, 4, 11, 13, 14),)
n_syms = len(tx_symbols)/fft_len
tag_name = "len"
tag = gr.tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(n_syms)
tag2 = gr.tag_t()
tag2.offset = 0
tag2.key = pmt.string_to_symbol("packet_len")
tag2.value = pmt.from_long(len(expected_result))
src = blocks.vector_source_c(tx_symbols, False, fft_len, (tag, tag2))
serializer = digital.ofdm_serializer_vcc(fft_len, occupied_carriers, tag_name, "packet_len", 0, "", False)
sink = blocks.vector_sink_c()
self.tb.connect(src, serializer, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_result)
self.assertEqual(len(sink.tags()), 1)
result_tag = sink.tags()[0]
self.assertEqual(pmt.symbol_to_string(result_tag.key), "packet_len")
self.assertEqual(pmt.to_long(result_tag.value), len(expected_result))
def handle_msg(self, msg):
if (pmt.is_tuple(msg)):
t = pmt.to_long(pmt.tuple_ref(msg, 0))
m = pmt.symbol_to_string(pmt.tuple_ref(msg, 1))
de = DataEvent([t, m])
wx.PostEvent(self.panel, de)
del de
def test_001b_shifted (self):
""" Same as before, but shifted, because that's the normal mode in OFDM Rx """
fft_len = 16
tx_symbols = (
0, 0, 0, 0, 0, 0, 1, 2, 0, 3, 4, 5, 0, 0, 0, 0,
0, 0, 0, 0, 6, 1j, 7, 8, 0, 9, 10, 1j, 11, 0, 0, 0,
0, 0, 0, 0, 0, 12, 13, 14, 0, 15, 16, 17, 0, 0, 0, 0,
)
expected_result = tuple(range(18))
occupied_carriers = ((13, 14, 15, 1, 2, 3), (-4, -2, -1, 1, 2, 4),)
n_syms = len(tx_symbols)/fft_len
tag_name = "len"
tag = gr.tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(n_syms)
src = blocks.vector_source_c(tx_symbols, False, fft_len, (tag,))
serializer = digital.ofdm_serializer_vcc(fft_len, occupied_carriers, tag_name)
sink = blocks.vector_sink_c()
self.tb.connect(src, serializer, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_result)
self.assertEqual(len(sink.tags()), 1)
result_tag = sink.tags()[0]
self.assertEqual(pmt.symbol_to_string(result_tag.key), tag_name)
self.assertEqual(pmt.to_long(result_tag.value), n_syms * len(occupied_carriers[0]))
def test_004_channel_no_carroffset_1sym(self):
""" Add a channel, check if it's correctly estimated.
Only uses 1 synchronisation symbol. """
fft_len = 16
carr_offset = 0
sync_symbol = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = sync_symbol + data_symbol
channel = (0, 0, 0, 2, 2, 2, 2, 3, 3, 2.5, 2.5, -3, -3, 1j, 1j, 0)
#channel = (0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0)
src = blocks.vector_source_c(tx_data, False, fft_len)
chan = blocks.multiply_const_vcc(channel)
chanest = digital.ofdm_chanest_vcvc(sync_symbol, (), 1)
sink = blocks.vector_sink_c(fft_len)
sink_chanest = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chan, chanest, sink)
self.tb.connect((chanest, 1), sink_chanest)
self.tb.run()
self.assertEqual(sink_chanest.data(), channel)
tags = sink.tags()
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_chan_taps':
self.assertEqual(pmt.c32vector_elements(tag.value), channel)
def work(self, input_items, output_items):
in0 = input_items[0]
out = output_items[0]
out[:] = in0[:]
nread = self.nitems_read(0) #number of items read on port 0
ninput_items = len(in0)
eob = pmt.string_to_symbol("tx_eob")
sob = pmt.string_to_symbol("tx_sob")
pan = pmt.string_to_symbol("pdu_length")
value = pmt.from_bool(1)
lng = pmt.from_long(8192)
source = pmt.string_to_symbol("add_uhd_tag")
tags = self.get_tags_in_range(0, nread, nread+ninput_items)
print "total input items : " + str(ninput_items)
for tag in tags:
#print "key : " + str(tag.key)
if str(tag.key) == "pdu_length":
#print "Found burst start at offset : " + str(tag.offset) + " with value : " + str(tag.value)
#print " -> Injecting tag tx_sob @" + str(tag.offset)
#print " -> Injecting tag tx_eob @" + str(tag.offset + pmt.to_long(tag.value) -1)
self.add_item_tag(0, tag.offset, sob, value, source)
self.add_item_tag(0, tag.offset + pmt.to_long(tag.value) -1, eob, value, source)
return len(out)
def test_006_channel_and_carroffset(self):
""" Add a channel, check if it's correctly estimated """
fft_len = 16
carr_offset = 2
# Index 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
sync_symbol1 = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
sync_symbol2 = (0, 0, 0, 1j, -1, 1, -1j, 1j, 0, 1, -1j, -1, -1j, 1, 0,
0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
# Channel 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
# Shifted (0, 0, 0, 0, 0, 1j, -1, 1, -1j, 1j, 0, 1, -1j, -1, -1j, 1)
chanest_exp = (0, 0, 0, 5, 6, 7, 8, 9, 0, 11, 12, 13, 14, 15, 0, 0)
tx_data = shift_tuple(sync_symbol1, carr_offset) + \
shift_tuple(sync_symbol2, carr_offset) + \
shift_tuple(data_symbol, carr_offset)
channel = list(range(fft_len))
src = blocks.vector_source_c(tx_data, False, fft_len)
chan = blocks.multiply_const_vcc(channel)
chanest = digital.ofdm_chanest_vcvc(sync_symbol1, sync_symbol2, 1)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chan, chanest, sink)
self.tb.run()
tags = sink.tags()
chan_est = None
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_chan_taps':
chan_est = pmt.c32vector_elements(tag.value)
self.assertEqual(chan_est, chanest_exp)
self.assertEqual(
sink.data(),
tuple(
numpy.multiply(shift_tuple(data_symbol, carr_offset),
channel)))
def vectors_to_packets(data, tags, tsb_tag_key, vlen=1):
lengthtags = [
t for t in tags if pmt.symbol_to_string(t.key) == tsb_tag_key
]
lengths = {}
for tag in lengthtags:
if tag.offset in lengths:
raise ValueError(
"More than one tags with key {0} with the same offset={1}.".
format(tsb_tag_key, tag.offset))
lengths[tag.offset] = pmt.to_long(tag.value) * vlen
if 0 not in lengths:
raise ValueError(
"There is no tag with key {0} and an offset of 0".format(
tsb_tag_key))
pos = 0
packets = []
while pos < len(data):
if pos not in lengths:
raise ValueError(
"There is no tag with key {0} and an offset of {1}."
"We were expecting one.".format(tsb_tag_key, pos))
length = lengths[pos]
if length == 0:
raise ValueError("Packets cannot have zero length.")
if pos + length > len(data):
raise ValueError("The final packet is incomplete.")
packets.append(data[pos:pos + length])
pos += length
return packets
def test_004_frames(self):
alpha = 3.
average_len = 8
frame_len = 25
backoff_len = 2 * average_len
tag_key = 'enertest'
# set up fg
detector = gfdm.frame_energy_detector_cc(alpha, average_len, frame_len, backoff_len, tag_key)
test_frame = np.zeros(frame_len + 2 * backoff_len)
test_frame[backoff_len:-backoff_len] = 100.
data = np.zeros(1000)
p = 6 * average_len
data[p:p + len(test_frame)] = test_frame
p = 60 * average_len
data[p:p + len(test_frame)] = test_frame
ref = np.tile(test_frame, 2)
src = blocks.vector_source_c(data)
snk = blocks.vector_sink_c()
self.tb.connect(src, detector, snk)
self.tb.run()
# check data
res = np.array(snk.data())
# make sure output is a multiple of average_len!
tags = snk.tags()
p = tags[0].offset
self.assertEqual(p, 0)
v = pmt.to_long(tags[0].value)
fl = frame_len + 2 * backoff_len
self.assertEqual(int(v), int(fl))
self.assertComplexTuplesAlmostEqual(res[0:len(test_frame)], test_frame)
def test_003_channel_no_carroffset (self):
""" Add a channel, check if it's correctly estimated """
fft_len = 16
carr_offset = 0
sync_symbol1 = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
sync_symbol2 = (0, 0, 0, 1j, -1, 1, -1j, 1j, 0, 1, -1j, -1, -1j, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = sync_symbol1 + sync_symbol2 + data_symbol
channel = (0, 0, 0, 2, -2, 2, 3j, 2, 0, 2, 2, 2, 2, 3, 0, 0)
src = blocks.vector_source_c(tx_data, False, fft_len)
chan = blocks.multiply_const_vcc(channel)
chanest = digital.ofdm_chanest_vcvc(sync_symbol1, sync_symbol2, 1)
sink = blocks.vector_sink_c(fft_len)
sink_chanest = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chan, chanest, sink)
self.tb.connect((chanest, 1), sink_chanest)
self.tb.run()
tags = sink.tags()
self.assertEqual(shift_tuple(sink.data(), -carr_offset), tuple(numpy.multiply(data_symbol, channel)))
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_chan_taps':
self.assertEqual(pmt.c32vector_elements(tag.value), channel)
self.assertEqual(sink_chanest.data(), channel)
def test_005_packet_len_tag (self):
""" Standard test """
fft_len = 16
tx_symbols = range(1, 16);
tx_symbols = (0, 1, 1j, 2, 3, 0, 0, 0, 0, 0, 0, 4, 5, 2j, 6, 0,
0, 7, 8, 3j, 9, 0, 0, 0, 0, 0, 0, 10, 4j, 11, 12, 0,
0, 13, 1j, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 2j, 0, 0)
expected_result = tuple(range(1, 16))
occupied_carriers = ((1, 3, 4, 11, 12, 14), (1, 2, 4, 11, 13, 14),)
n_syms = len(tx_symbols)/fft_len
tag_name = "len"
tag = gr.tag_t()
tag.offset = 0
tag.key = pmt.string_to_symbol(tag_name)
tag.value = pmt.from_long(n_syms)
tag2 = gr.tag_t()
tag2.offset = 0
tag2.key = pmt.string_to_symbol("packet_len")
tag2.value = pmt.from_long(len(expected_result))
src = blocks.vector_source_c(tx_symbols, False, fft_len, (tag, tag2))
serializer = digital.ofdm_serializer_vcc(fft_len, occupied_carriers, tag_name, "packet_len", 0, "", False)
sink = blocks.vector_sink_c()
self.tb.connect(src, serializer, sink)
self.tb.run ()
self.assertEqual(sink.data(), expected_result)
self.assertEqual(len(sink.tags()), 1)
result_tag = sink.tags()[0]
self.assertEqual(pmt.symbol_to_string(result_tag.key), "packet_len")
self.assertEqual(pmt.to_long(result_tag.value), len(expected_result))
def handle_msg(self, msg):
if(pmt.is_tuple(msg)):
t = pmt.to_long(pmt.tuple_ref(msg, 0))
m = pmt.symbol_to_string(pmt.tuple_ref(msg, 1))
if (t==0): #program information
msg = unicode(m, errors='replace')
self.stationID = msg
def test17(self):
const = self.MININT32 + 1
x_pmt = pmt.from_long(const)
s = pmt.serialize_str(x_pmt)
deser = pmt.deserialize_str(s)
self.assertTrue(pmt.equal(x_pmt, deser))
x_long = pmt.to_long(deser)
self.assertEqual(const, x_long)
def test17(self):
const = self.MININT32 + 1
x_pmt = pmt.from_long(const)
s = pmt.serialize_str(x_pmt)
deser = pmt.deserialize_str(s)
self.assertTrue(pmt.equal(x_pmt, deser))
x_long = pmt.to_long(deser)
self.assertEqual(const, x_long)
def handle_msg(self, msg_pmt):
""" Receiver a int on the input port, and print it out. """
print "Message Handler Called"
# Collect message, convert to Python format:
newIndex = pmt.to_long(msg_pmt)
print "Got New Message: "+str(newIndex)
print id(self)
# Change output to new from message
self.set_output_index(newIndex)
def handle_msg(self, msg):
if (not pmt.is_tuple(msg)):
return
msg_type = pmt.to_long(pmt.tuple_ref(msg, 0))
msg = pmt.symbol_to_string(pmt.tuple_ref(msg, 1))
msg = msg
self.msg_signal.emit(msg_type, msg)
def act_prot_in(self, msg): # {{{
if self.coord == False: # Coord already knows the current MAC protocol
portid = pmt.to_long(msg)
msg = "portid" + str(portid)
self.message_port_pub(self.msg_port_ctrl_out, pmt.string_to_symbol(msg))
if portid == 0:
logging.info("Active protocol: CSMA/CA")
elif portid == 1:
logging.info("Active protocol: TDMA")
def test_packet_parse_default(self):
ac = packet_utils.default_access_code
length = '0000000000000001'
hdr_format_1bps = digital.header_format_default(ac, 0)
hdr_format_4bps = digital.header_format_default(ac, 0, 4)
ac_bits = [int(x) & 1 for x in ac]
length_bits = [int(x) & 1 for x in length]
header_bits = ac_bits + length_bits + length_bits
src_hdr = blocks.vector_source_b(header_bits)
parser_1bps = digital.protocol_parser_b(hdr_format_1bps)
parser_4bps = digital.protocol_parser_b(hdr_format_4bps)
snk_hdr_1bps = blocks.message_debug()
snk_hdr_4bps = blocks.message_debug()
self.tb.connect(src_hdr, parser_1bps)
self.tb.connect(src_hdr, parser_4bps)
self.tb.msg_connect(parser_1bps, 'info', snk_hdr_1bps, 'store')
self.tb.msg_connect(parser_4bps, 'info', snk_hdr_4bps, 'store')
self.tb.start()
while (snk_hdr_1bps.num_messages() < 1) and (snk_hdr_4bps.num_messages() < 1):
time.sleep(0.1)
self.tb.stop()
self.tb.wait()
result_1bps = snk_hdr_1bps.get_message(0)
result_4bps = snk_hdr_4bps.get_message(0)
self.assertTrue(pmt.dict_has_key(
result_1bps, pmt.intern('payload symbols')))
self.assertEqual(pmt.to_long(pmt.dict_ref(
result_1bps, pmt.intern('payload symbols'), pmt.PMT_F)), 8)
self.assertTrue(pmt.dict_has_key(
result_4bps, pmt.intern('payload symbols')))
self.assertEqual(pmt.to_long(pmt.dict_ref(
result_4bps, pmt.intern('payload symbols'), pmt.PMT_F)), 2)
def handle_msg(self, msg):
f = open("songs.txt", "w")
if(pmt.is_tuple(msg)):
t = pmt.to_long(pmt.tuple_ref(msg, 0))
m = pmt.symbol_to_string(pmt.tuple_ref(msg, 1))
print("message:", m)
de = DataEvent([t, m])
f.write(de,"w");
del de
f.close()
def tag_propagation(self, ninput_items):
self.set_tag_propagation_policy(0)
nread = self.nitems_read(0) #number of items read on port 0
tags = self.get_tags_in_range(0, nread, nread + ninput_items)
key = pmt.intern("packet_len")
if tags:
for i in range(len(tags)):
offset = tags[i].offset * self.factor
value = pmt.from_long(pmt.to_long(tags[i].value) * self.factor)
self.add_item_tag(0, offset, key, value)
def test18(self):
if(self.sizeof_long <= 4):
return
const = self.MININT32 - 1
x_pmt = pmt.from_long(const)
s = pmt.serialize_str(x_pmt)
deser = pmt.deserialize_str(s)
self.assertTrue(pmt.equal(x_pmt, deser))
x_long = pmt.to_long(deser)
self.assertEqual(const, x_long)
def test_001_offset_2sym(self):
""" Add a frequency offset, check if it's correctly detected.
Also add some random tags and see if they come out at the correct
position. """
fft_len = 16
carr_offset = -2
sync_symbol1 = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
sync_symbol2 = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = shift_tuple(sync_symbol1, carr_offset) + \
shift_tuple(sync_symbol2, carr_offset) + \
shift_tuple(data_symbol, carr_offset)
tag1 = gr.tag_t()
tag1.offset = 0
tag1.key = pmt.string_to_symbol("test_tag_1")
tag1.value = pmt.from_long(23)
tag2 = gr.tag_t()
tag2.offset = 2
tag2.key = pmt.string_to_symbol("test_tag_2")
tag2.value = pmt.from_long(42)
src = blocks.vector_source_c(tx_data, False, fft_len, (tag1, tag2))
chanest = digital.ofdm_chanest_vcvc(sync_symbol1, sync_symbol2, 1)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chanest, sink)
self.tb.run()
self.assertEqual(shift_tuple(sink.data(), -carr_offset), data_symbol)
tags = sink.tags()
detected_tags = {
'ofdm_sync_carr_offset': False,
'test_tag_1': False,
'test_tag_2': False
}
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
carr_offset_hat = pmt.to_long(tag.value)
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'test_tag_1':
self.assertEqual(tag.offset, 0)
if pmt.symbol_to_string(tag.key) == 'test_tag_2':
self.assertEqual(tag.offset, 0)
detected_tags[pmt.symbol_to_string(tag.key)] = True
self.assertTrue(all(detected_tags.values()))
def test_001_offset_2sym (self):
""" Add a frequency offset, check if it's correctly detected.
Also add some random tags and see if they come out at the correct
position. """
fft_len = 16
carr_offset = -2
sync_symbol1 = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
sync_symbol2 = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = shift_tuple(sync_symbol1, carr_offset) + \
shift_tuple(sync_symbol2, carr_offset) + \
shift_tuple(data_symbol, carr_offset)
tag1 = gr.tag_t()
tag1.offset = 0
tag1.key = pmt.string_to_symbol("test_tag_1")
tag1.value = pmt.from_long(23)
tag2 = gr.tag_t()
tag2.offset = 2
tag2.key = pmt.string_to_symbol("test_tag_2")
tag2.value = pmt.from_long(42)
src = blocks.vector_source_c(tx_data, False, fft_len, (tag1, tag2))
chanest = digital.ofdm_chanest_vcvc(sync_symbol1, sync_symbol2, 1)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chanest, sink)
self.tb.run()
self.assertEqual(shift_tuple(sink.data(), -carr_offset), data_symbol)
tags = sink.tags()
detected_tags = {
'ofdm_sync_carr_offset': False,
'test_tag_1': False,
'test_tag_2': False
}
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
carr_offset_hat = pmt.to_long(tag.value)
self.assertEqual(pmt.to_long(tag.value), carr_offset)
if pmt.symbol_to_string(tag.key) == 'test_tag_1':
self.assertEqual(tag.offset, 0)
if pmt.symbol_to_string(tag.key) == 'test_tag_2':
self.assertEqual(tag.offset, 0)
detected_tags[pmt.symbol_to_string(tag.key)] = True
self.assertTrue(all(detected_tags.values()))
def handler(self, rds_data):
msg_type = pmt.to_long(pmt.tuple_ref(rds_data, 0))
msg = pmt.symbol_to_string(pmt.tuple_ref(rds_data, 1))
if msg_type == 4:
self.radio_text.setText(msg.strip())
elif msg_type == 1:
self.station_name.setText(msg)
elif msg_type == 0:
self.program_info.setText(callsign(msg))
elif msg_type == 3:
self.flags.update(msg)
def handler(self, rds_data):
msg_type = pmt.to_long(pmt.tuple_ref(rds_data, 0))
msg = pmt.symbol_to_string(pmt.tuple_ref(rds_data, 1))
if msg_type == 4:
self.radio_text.setText(msg.strip())
elif msg_type == 1:
self.station_name.setText(msg)
elif msg_type == 0:
self.program_info.setText(callsign(msg))
elif msg_type == 3:
self.flags.update(msg)
def work(self, input_items, output_items):
num_input_items = len(input_items[0])
nread = self.nitems_read(0)
tags = self.get_tags_in_range(0, nread, nread + num_input_items)
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'pa_ramp':
tx_on = pmt.to_long(tag.value)
if tx_on == 1:
self.tx_on_at = tag.offset
else:
self.tx_off_at = tag.offset
return num_input_items
def set_signal_number_msg(self, msg):
if pmt.is_pair(msg):
key = pmt.car(msg)
val = pmt.cdr(msg)
if pmt.eq(key, pmt.string_to_symbol("signal_number_msg")):
if pmt.is_integer(val):
self.n = pmt.to_long(val)
else:
print("DoA Esprit: Not an integer")
else:
print("DoA Esprit: Key not 'signal_number_msg'")
else:
print("DoA Esprit: Not a tuple")
def work(self, input_items, output_items):
num_input_items = len(input_items[0])
nread = self.nitems_read(0)
tags = self.get_tags_in_range(0, nread, nread+num_input_items);
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'pa_ramp':
tx_on = pmt.to_long(tag.value)
if tx_on == 1:
self.tx_on_at = tag.offset
else:
self.tx_off_at = tag.offset
return num_input_items
def test_002_offset_1sym (self):
""" Add a frequency offset, check if it's correctly detected.
Difference to previous test is, it only uses one synchronisation symbol. """
fft_len = 16
carr_offset = -2
# This will not correct for +2 because it thinks carrier 14 is used
# (because of interpolation)
sync_symbol = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = shift_tuple(sync_symbol, carr_offset) + \
shift_tuple(data_symbol, carr_offset)
src = blocks.vector_source_c(tx_data, False, fft_len)
# 17 is out of bounds!
chanest = digital.ofdm_chanest_vcvc(sync_symbol, (), 1, 0, 17)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chanest, sink)
self.tb.run()
self.assertEqual(shift_tuple(sink.data(), -carr_offset), data_symbol)
tags = sink.tags()
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
carr_offset_hat = pmt.to_long(tag.value)
self.assertEqual(pmt.to_long(tag.value), carr_offset)
def test_002_offset_1sym (self):
""" Add a frequency offset, check if it's correctly detected.
Difference to previous test is, it only uses one synchronisation symbol. """
fft_len = 16
carr_offset = -2
# This will not correct for +2 because it thinks carrier 14 is used
# (because of interpolation)
sync_symbol = (0, 0, 0, 1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0)
data_symbol = (0, 0, 0, 1, -1, 1, -1, 1, 0, 1, -1, -1, -1, 1, 0, 0)
tx_data = shift_tuple(sync_symbol, carr_offset) + \
shift_tuple(data_symbol, carr_offset)
src = blocks.vector_source_c(tx_data, False, fft_len)
# 17 is out of bounds!
chanest = digital.ofdm_chanest_vcvc(sync_symbol, (), 1, 0, 17)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, chanest, sink)
self.tb.run()
self.assertEqual(shift_tuple(sink.data(), -carr_offset), data_symbol)
tags = sink.tags()
for tag in tags:
if pmt.symbol_to_string(tag.key) == 'ofdm_sync_carr_offset':
carr_offset_hat = pmt.to_long(tag.value)
self.assertEqual(pmt.to_long(tag.value), carr_offset)
def test_002_simpledfe (self):
""" Use the simple DFE equalizer. """
fft_len = 8
# 4 5 6 7 0 1 2 3
tx_data = [-1, -1, 1, 2, -1, 3, 0, -1, # 0
-1, -1, 0, 2, -1, 2, 0, -1, # 8
-1, -1, 3, 0, -1, 1, 0, -1, # 16 (Pilot symbols)
-1, -1, 1, 1, -1, 0, 2, -1] # 24
cnst = digital.constellation_qpsk()
tx_signal = [cnst.map_to_points_v(x)[0] if x != -1 else 0 for x in tx_data]
occupied_carriers = ((1, 2, 6, 7),)
pilot_carriers = ((), (), (1, 2, 6, 7), ())
pilot_symbols = (
[], [], [cnst.map_to_points_v(x)[0] for x in (1, 0, 3, 0)], []
)
equalizer = digital.ofdm_equalizer_simpledfe(
fft_len, cnst.base(), occupied_carriers, pilot_carriers, pilot_symbols, 0, 0.01
)
channel = [
0, 0, 1, 1, 0, 1, 1, 0,
0, 0, 1, 1, 0, 1, 1, 0, # These coefficients will be rotated slightly...
0, 0, 1j, 1j, 0, 1j, 1j, 0, # Go crazy here!
0, 0, 1j, 1j, 0, 1j, 1j, 0 # ...and again here.
]
for idx in range(fft_len, 2*fft_len):
channel[idx] = channel[idx-fft_len] * numpy.exp(1j * .1 * numpy.pi * (numpy.random.rand()-.5))
idx2 = idx+2*fft_len
channel[idx2] = channel[idx2] * numpy.exp(1j * 0 * numpy.pi * (numpy.random.rand()-.5))
len_tag_key = "frame_len"
len_tag = gr.tag_t()
len_tag.offset = 0
len_tag.key = pmt.string_to_symbol(len_tag_key)
len_tag.value = pmt.from_long(4)
chan_tag = gr.tag_t()
chan_tag.offset = 0
chan_tag.key = pmt.string_to_symbol("ofdm_sync_chan_taps")
chan_tag.value = pmt.init_c32vector(fft_len, channel[:fft_len])
src = blocks.vector_source_c(numpy.multiply(tx_signal, channel), False, fft_len, (len_tag, chan_tag))
eq = digital.ofdm_frame_equalizer_vcvc(equalizer.base(), 0, len_tag_key, True)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, eq, sink)
self.tb.run ()
rx_data = [cnst.decision_maker_v((x,)) if x != 0 else -1 for x in sink.data()]
self.assertEqual(tx_data, rx_data)
for tag in sink.tags():
if pmt.symbol_to_string(tag.key) == len_tag_key:
self.assertEqual(pmt.to_long(tag.value), 4)
if pmt.symbol_to_string(tag.key) == "ofdm_sync_chan_taps":
self.assertComplexTuplesAlmostEqual(list(pmt.c32vector_elements(tag.value)), channel[-fft_len:], places=1)
def test_002_simpledfe (self):
""" Use the simple DFE equalizer. """
fft_len = 8
# 4 5 6 7 0 1 2 3
tx_data = [-1, -1, 1, 2, -1, 3, 0, -1, # 0
-1, -1, 0, 2, -1, 2, 0, -1, # 8
-1, -1, 3, 0, -1, 1, 0, -1, # 16 (Pilot symbols)
-1, -1, 1, 1, -1, 0, 2, -1] # 24
cnst = digital.constellation_qpsk()
tx_signal = [cnst.map_to_points_v(x)[0] if x != -1 else 0 for x in tx_data]
occupied_carriers = ((1, 2, 6, 7),)
pilot_carriers = ((), (), (1, 2, 6, 7), ())
pilot_symbols = (
[], [], [cnst.map_to_points_v(x)[0] for x in (1, 0, 3, 0)], []
)
equalizer = digital.ofdm_equalizer_simpledfe(
fft_len, cnst.base(), occupied_carriers, pilot_carriers, pilot_symbols, 0, 0.01
)
channel = [
0, 0, 1, 1, 0, 1, 1, 0,
0, 0, 1, 1, 0, 1, 1, 0, # These coefficients will be rotated slightly...
0, 0, 1j, 1j, 0, 1j, 1j, 0, # Go crazy here!
0, 0, 1j, 1j, 0, 1j, 1j, 0 # ...and again here.
]
for idx in range(fft_len, 2*fft_len):
channel[idx] = channel[idx-fft_len] * numpy.exp(1j * .1 * numpy.pi * (numpy.random.rand()-.5))
idx2 = idx+2*fft_len
channel[idx2] = channel[idx2] * numpy.exp(1j * 0 * numpy.pi * (numpy.random.rand()-.5))
len_tag_key = "frame_len"
len_tag = gr.tag_t()
len_tag.offset = 0
len_tag.key = pmt.string_to_symbol(len_tag_key)
len_tag.value = pmt.from_long(4)
chan_tag = gr.tag_t()
chan_tag.offset = 0
chan_tag.key = pmt.string_to_symbol("ofdm_sync_chan_taps")
chan_tag.value = pmt.init_c32vector(fft_len, channel[:fft_len])
src = blocks.vector_source_c(numpy.multiply(tx_signal, channel), False, fft_len, (len_tag, chan_tag))
eq = digital.ofdm_frame_equalizer_vcvc(equalizer.base(), 0, len_tag_key, True)
sink = blocks.vector_sink_c(fft_len)
self.tb.connect(src, eq, sink)
self.tb.run ()
rx_data = [cnst.decision_maker_v((x,)) if x != 0 else -1 for x in sink.data()]
self.assertEqual(tx_data, rx_data)
for tag in sink.tags():
if pmt.symbol_to_string(tag.key) == len_tag_key:
self.assertEqual(pmt.to_long(tag.value), 4)
if pmt.symbol_to_string(tag.key) == "ofdm_sync_chan_taps":
self.assertComplexTuplesAlmostEqual(list(pmt.c32vector_elements(tag.value)), channel[-fft_len:], places=1)
def test_001_t(self):
fftlen = 128
cell_id = 124
taps = filter.optfir.low_pass(1, fftlen*15e3, 472.5e3, 900e3, 0.2, 40)
samples = t.get_mod_frame(cell_id, 6, 1, fftlen)
samps = np.tile(samples[0], 5)
src = blocks.vector_source_c(samps, repeat=False, vlen=1)
fir = filter.fir_filter_ccc(fftlen/64, taps)
sync = lte.mimo_pss_coarse_sync(4, 1)
dbg0 = blocks.message_debug()
dbg1 = blocks.message_debug()
dbg2 = blocks.message_debug()
self.tb.connect(src, fir, sync)
self.tb.msg_connect((sync, 'control'), (dbg0, 'store'))
self.tb.msg_connect((sync, 'N_id_2'), (dbg1, 'store'))
self.tb.msg_connect((sync, 'coarse_pos'), (dbg2, 'store'))
# set up fg
self.tb.run()
# check data
self.assertEqual(pmt.to_long(dbg1.get_message(0)), int(cell_id % 3))
ctrl_res = pmt.to_bool(dbg0.get_message(0))
assert ctrl_res
offset = 10 + 5 * 9 + 6 * fftlen
print(offset)
# print()
pos = pmt.to_long(dbg2.get_message(0))
print(pos)
print(pos * 2 - (len(taps) // 2))
import matplotlib.pyplot as plt
plt.plot(np.abs(samps))
plt.show()
def handle_msg(self, msg):
cell_id = pmt.to_long(msg)
if self.cell_id == cell_id:
return
else:
self.cell_id = cell_id
print "received cell_id = " + str(cell_id)
seqs = []
seq = lte.encode_nrz(lte.generate_pn_sequence(1920, cell_id))
pmt_list = pmt.list1(pmt.from_double(seq[0]))
for i in range(len(seq) - 1):
pmt_list = pmt.list_add(pmt_list, pmt.from_double(seq[i+1]))
self.message_port_pub(self.msg_buf_out, pmt_list)
def handle_msg(self, msg):
cell_id = pmt.to_long(msg)
if self.cell_id == cell_id:
return
else:
self.cell_id = cell_id
print "received cell_id = " + str(cell_id)
seqs = []
seq = lte.encode_nrz(lte.generate_pn_sequence(1920, cell_id))
pmt_list = pmt.list1(pmt.from_double(seq[0]))
for i in range(len(seq) - 1):
pmt_list = pmt.list_add(pmt_list, pmt.from_double(seq[i + 1]))
self.message_port_pub(self.msg_buf_out, pmt_list)
def wait_tags(self, in0, out):
n_read = self.nitems_read(0) #Number of items read on port 0
tags = self.get_tags_in_range(0, n_read, n_read+self.n_input_items)
key = pmt.intern("pdu_len")
if tags:
for i in range(len(tags)):
if (pmt.eq(key, tags[i].key)):
self.offset_rel = tags[i].offset - n_read
self.pdu_len = pmt.to_long(tags[i].value) * 8
self.add_item_tag(0, self.offset_tag, key, pmt.from_long(self.pdu_len))
self.offset_tag = self.offset_tag + self.pdu_len
self.num = 1
break
self.consume(0,self.offset_rel)
else:
self.num = 0
def handle_msg(self, msg):
cell_id = pmt.to_long(msg)
if self.cell_id == cell_id:
return
else:
self.cell_id = cell_id
print "received cell_id = " + str(cell_id)
seqs = pmt.make_vector(10, pmt.make_vector(32, pmt.from_double(0.0)))
for ns in range(10):
scr = utils.get_pcfich_scrambling_sequence(cell_id, ns)
scr = utils.encode_nrz(scr)
pmt_seq = pmt.make_vector(len(scr), pmt.from_double(0.0))
for i in range(len(scr)):
pmt.vector_set(pmt_seq, i, pmt.from_double(scr[i]))
pmt.vector_set(seqs, ns, pmt_seq)
self.message_port_pub(self.msg_buf_out, seqs)
def handle_msg(self, msg):
cell_id = pmt.to_long(msg)
if cell_id == self.cell_id:
return
else:
self.cell_id = cell_id
print self.name(), " cell_id = ", self.cell_id, " generating RS map!"
#print "generate pilot map: cell_id = " + str(cell_id) + "\tant_port = " + str(self.ant_port)
Ncp = 1 # Always 1 for our purposes --> thus it's hard coded
[rs_poss, rs_vals] = self.frame_pilot_value_and_position(self.N_rb_dl, cell_id, Ncp, self.ant_port)
pmt_rs = self.rs_pos_to_pmt(rs_poss)
pmt_vals = self.rs_val_to_pmt(rs_vals)
pmt_pilots = pmt.list2(pmt_rs, pmt_vals)
self.message_port_pub(self.msg_buf_out, pmt_pilots)
def handle_msg(self, msg):
cell_id = pmt.to_long(msg)
if self.cell_id == cell_id:
return
else:
self.cell_id = cell_id
print "received cell_id = " + str(cell_id)
seqs = pmt.make_vector(10, pmt.make_vector(32, pmt.from_double(0.0)))
for ns in range(10):
scr = utils.get_pcfich_scrambling_sequence(cell_id, ns)
scr = utils.encode_nrz(scr)
pmt_seq = pmt.make_vector(len(scr), pmt.from_double(0.0))
for i in range(len(scr)):
pmt.vector_set(pmt_seq, i, pmt.from_double(scr[i]))
pmt.vector_set(seqs, ns, pmt_seq)
self.message_port_pub(self.msg_buf_out, seqs)
def handle_msg(self, msg):
cell_id = pmt.to_long(msg)
if cell_id == self.cell_id:
return
else:
self.cell_id = cell_id
print self.name(), " cell_id = ", self.cell_id, " generating RS map!"
#print "generate pilot map: cell_id = " + str(cell_id) + "\tant_port = " + str(self.ant_port)
Ncp = 1 # Always 1 for our purposes --> thus it's hard coded
[rs_poss, rs_vals] = self.frame_pilot_value_and_position(self.N_rb_dl, cell_id, Ncp, self.ant_port)
pmt_rs = self.rs_pos_to_pmt(rs_poss)
pmt_vals = self.rs_val_to_pmt(rs_vals)
pmt_pilots = pmt.list2(pmt_rs, pmt_vals)
self.message_port_pub(self.msg_buf_out, pmt_pilots)
def test_001(self):
payload = "test packet" # payload length is 11 bytes
header = "\x00\xd0\x00\xd0" # header contains packet length, twice (bit-swapped)
packet = header + payload
pad = (0,) * 64
src_data = (0, 0, 1, 1, 1, 1, 0, 1, 1) + tuple(string_to_1_0_list(packet)) + pad
expected = tuple(map(int, src_data[9+32:-len(pad)]))
src = blocks.vector_source_b(src_data)
op = digital.correlate_access_code_bb_ts("1011", 0, "sync")
dst = blocks.vector_sink_b()
self.tb.connect(src, op, dst)
self.tb.run()
result_data = dst.data()
result_tags = dst.tags()
self.assertEqual(len(result_data), len(payload)*8)
self.assertEqual(result_tags[0].offset, 0)
self.assertEqual(pmt.to_long(result_tags[0].value), len(payload)*8)
self.assertEqual(result_data, expected)
def test_002(self):
payload = "test packet" # payload length is 11 bytes
header = "\x00\xd0\x00\xd0" # header contains packet length, twice (bit-swapped)
packet = header + payload
pad = (0,) * 64
src_data = (0, 0, 1, 1, 1, 1, 0, 1, 1) + tuple(string_to_1_0_list(packet)) + pad
src_floats = tuple(2*b-1 for b in src_data) # convert to binary antipodal symbols (-1,1)
expected = src_floats[9+32:-len(pad)]
src = blocks.vector_source_f(src_floats)
op = digital.correlate_access_code_ff_ts("1011", 0, "sync")
dst = blocks.vector_sink_f()
self.tb.connect(src, op, dst)
self.tb.run()
result_data = dst.data()
result_tags = dst.tags()
self.assertEqual(len(result_data), len(payload)*8)
self.assertEqual(result_tags[0].offset, 0)
self.assertEqual(pmt.to_long(result_tags[0].value), len(payload)*8)
self.assertFloatTuplesAlmostEqual(result_data, expected, 5)
