def setup_qpsk0(self):
self.tb = gr.top_block()
pts, code = digital.psk_4_0x0_0_1()
constellation = digital.constellation_psk(pts, code, 4)
self.src = blocks.vector_source_b(self.src_data_qpsk)
self.p2u = blocks.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
self.mod = digital.generic_mod(constellation, True, self.sps, True, self.eb)
self.snk = blocks.null_sink(gr.sizeof_gr_complex)
self.tb.connect(self.src, self.p2u, self.mod, self.snk)
def setup_qpsk0(self):
self.tb = gr.top_block()
pts, code = digital.psk_4_0x0_0_1()
constellation = digital.constellation_psk(pts, code, 4)
self.src = blocks.vector_source_b(self.src_data_qpsk)
self.p2u = blocks.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
self.mod = digital.generic_mod(constellation, True, self.sps, True, self.eb)
self.snk = blocks.null_sink(gr.sizeof_gr_complex)
self.tb.connect(self.src, self.p2u, self.mod, self.snk)
def setup_qpsk0(self):
self.tb = gr.top_block()
# Build the constellation object
arity = 4
bps = 2
pts, code = digital.psk_4_0x0_0_1()
constellation = digital.constellation_psk(pts, code, 4)
# Create QPSK data to pass to the demodulator
src = blocks.vector_source_b(self.src_data_qpsk)
p2u = blocks.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
mod = digital.generic_mod(constellation, True, self.sps, True, self.eb)
snk = blocks.vector_sink_c()
tb = gr.top_block()
tb.connect(src, p2u, mod, snk)
tb.run()
self.src = blocks.vector_source_c(snk.data())
self.freq_recov = digital.fll_band_edge_cc(self.sps, self.eb,
self.fll_ntaps,
self.freq_bw)
self.time_recov = digital.pfb_clock_sync_ccf(self.sps, self.timing_bw,
self.taps, self.nfilts,
self.nfilts // 2,
self.timing_max_dev)
self.receiver = digital.constellation_receiver_cb(
constellation.base(), self.phase_bw, self.fmin, self.fmax)
self.diffdec = digital.diff_decoder_bb(arity)
self.symbol_mapper = digital.map_bb(
mod_codes.invert_code(constellation.pre_diff_code()))
self.unpack = blocks.unpack_k_bits_bb(bps)
self.snk = blocks.null_sink(gr.sizeof_char)
self.tb.connect(self.src, self.freq_recov, self.time_recov,
self.receiver)
self.tb.connect(self.receiver, self.diffdec, self.symbol_mapper,
self.unpack)
self.tb.connect(self.unpack, self.snk)
def test_constellation_soft_decoder_cf_qpsk(self):
prec = 8
src_data = (0.5 + 0.5j, 0.1 - 1.2j, -0.8 - 0.1j, -0.45 + 0.8j,
0.8 + 1.0j, -0.5 + 0.1j, 0.1 - 1.2j, 1+1j)
lut = digital.soft_dec_table_generator(digital.sd_psk_4_0x0_0_1, prec)
expected_result = list()
for s in src_data:
expected_result += digital.calc_soft_dec_from_table(s, lut, prec)
cnst_pts,code = digital.psk_4_0x0_0_1()
cnst = digital.constellation_calcdist(cnst_pts, code, 2, 1)
cnst.set_soft_dec_lut(lut, int(prec))
src = blocks.vector_source_c(src_data)
op = digital.constellation_soft_decoder_cf(cnst.base())
dst = blocks.vector_sink_f()
self.tb.connect(src, op)
self.tb.connect(op, dst)
self.tb.run() # run the graph and wait for it to finish
actual_result = dst.data() # fetch the contents of the sink
#print "actual result", actual_result
#print "expected result", expected_result
self.assertFloatTuplesAlmostEqual(expected_result, actual_result, 5)
def setup_qpsk0(self):
self.tb = gr.top_block()
# Build the constellation object
arity = 4
bps = 2
pts, code = digital.psk_4_0x0_0_1()
constellation = digital.constellation_psk(pts, code, 4)
# Create QPSK data to pass to the demodulator
src = blocks.vector_source_b(self.src_data_qpsk)
p2u = blocks.unpacked_to_packed_bb(1, gr.GR_MSB_FIRST)
mod = digital.generic_mod(constellation, True, self.sps, True, self.eb)
snk = blocks.vector_sink_c()
tb = gr.top_block()
tb.connect(src, p2u, mod, snk)
tb.run()
self.src = blocks.vector_source_c(snk.data())
self.freq_recov = digital.fll_band_edge_cc(self.sps, self.eb,
self.fll_ntaps, self.freq_bw)
self.time_recov = digital.pfb_clock_sync_ccf(self.sps, self.timing_bw, self.taps,
self.nfilts, self.nfilts//2, self.timing_max_dev)
self.receiver = digital.constellation_receiver_cb(
constellation.base(), self.phase_bw, self.fmin, self.fmax)
self.diffdec = digital.diff_decoder_bb(arity)
self.symbol_mapper = digital.map_bb(
mod_codes.invert_code(constellation.pre_diff_code()))
self.unpack = blocks.unpack_k_bits_bb(bps)
self.snk = blocks.null_sink(gr.sizeof_char)
self.tb.connect(self.src, self.freq_recov, self.time_recov, self.receiver)
self.tb.connect(self.receiver, self.diffdec, self.symbol_mapper, self.unpack)
self.tb.connect(self.unpack, self.snk)