def test_001_ofdm_move_and_insert_zero(self): num_carriers = 4 fft_length = 10 d_zeros_on_left = 3 src_data0 = range(0,8) expected_result0 = [0,0,0]+[0,1]+[0]+[2,3]+[0,0]+[0,0,0]+[4,5]+[0]+[6,7]+[0,0] expected_result0 = [complex(x) for x in expected_result0] src0 = blocks.vector_source_c(src_data0) s2v0 = blocks.stream_to_vector(gr.sizeof_gr_complex, num_carriers) ofdm_move_and_insert_zero = dab.ofdm_move_and_insert_zero(fft_length,num_carriers) v2s0 = blocks.vector_to_stream(gr.sizeof_gr_complex, fft_length) dst0 = blocks.vector_sink_c() self.tb.connect(src0, s2v0, ofdm_move_and_insert_zero, v2s0, dst0) self.tb.run() result_data0 = dst0.data() # print expected_result0 # print result_data0 self.assertComplexTuplesAlmostEqual(expected_result0, result_data0, 6)
def test_001_ofdm_move_and_insert_zero(self):
num_carriers = 4
fft_length = 10
d_zeros_on_left = 3
src_data0 = range(0, 8)
expected_result0 = [0, 0, 0] + [0, 1] + [0] + [2, 3] + [0, 0] + [
0, 0, 0
] + [4, 5] + [0] + [6, 7] + [0, 0]
expected_result0 = [complex(x) for x in expected_result0]
src0 = blocks.vector_source_c(src_data0)
s2v0 = blocks.stream_to_vector(gr.sizeof_gr_complex, num_carriers)
ofdm_move_and_insert_zero = dab.ofdm_move_and_insert_zero(
fft_length, num_carriers)
v2s0 = blocks.vector_to_stream(gr.sizeof_gr_complex, fft_length)
dst0 = blocks.vector_sink_c()
self.tb.connect(src0, s2v0, ofdm_move_and_insert_zero, v2s0, dst0)
self.tb.run()
result_data0 = dst0.data()
# print expected_result0
# print result_data0
self.assertComplexTuplesAlmostEqual(expected_result0, result_data0, 6)
def __init__(self, dab_params, verbose=False, debug=False): """ Hierarchical block for OFDM modulation @param dab_params DAB parameter object (dab.parameters.dab_parameters) @param debug enables debug output to files """ dp = dab_params gr.hier_block2.__init__(self,"ofdm_mod", gr.io_signature2(2, 2, gr.sizeof_char*dp.num_carriers/4, gr.sizeof_char), # input signature gr.io_signature (1, 1, gr.sizeof_gr_complex)) # output signature # symbol mapping self.mapper = dab.qpsk_mapper_vbc(dp.num_carriers) # add pilot symbol self.insert_pilot = dab.ofdm_insert_pilot_vcc(dp.prn) # phase sum self.sum_phase = dab.sum_phasor_trig_vcc(dp.num_carriers) # frequency interleaving self.interleave = dab.frequency_interleaver_vcc(dp.frequency_interleaving_sequence_array) # add central carrier & move to middle self.move_and_insert_carrier = dab.ofdm_move_and_insert_zero(dp.fft_length, dp.num_carriers) # ifft self.ifft = fft.fft_vcc(dp.fft_length, False, [], True) # cyclic prefixer self.prefixer = digital.ofdm_cyclic_prefixer(dp.fft_length, dp.symbol_length) # convert back to vectors self.s2v = blocks.stream_to_vector(gr.sizeof_gr_complex, dp.symbol_length) # add null symbol self.insert_null = dab.insert_null_symbol(dp.ns_length, dp.symbol_length) # # connect it all # # data self.connect((self,0), self.mapper, (self.insert_pilot,0), (self.sum_phase,0), self.interleave, self.move_and_insert_carrier, self.ifft, self.prefixer, self.s2v, (self.insert_null,0)) self.connect(self.insert_null, self) # control signal (frame start) self.connect((self,1), (self.insert_pilot,1), (self.sum_phase,1), (self.insert_null,1)) if debug: self.connect(self.mapper, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_mapper.dat")) self.connect(self.insert_pilot, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_insert_pilot.dat")) self.connect(self.sum_phase, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_sum_phase.dat")) self.connect(self.interleave, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_interleave.dat")) self.connect(self.move_and_insert_carrier, blocks.file_sink(gr.sizeof_gr_complex*dp.fft_length, "debug/generated_signal_move_and_insert_carrier.dat")) self.connect(self.ifft, blocks.file_sink(gr.sizeof_gr_complex*dp.fft_length, "debug/generated_signal_ifft.dat")) self.connect(self.prefixer, blocks.file_sink(gr.sizeof_gr_complex, "debug/generated_signal_prefixer.dat")) self.connect(self.insert_null, blocks.file_sink(gr.sizeof_gr_complex, "debug/generated_signal.dat"))
def __init__(self, dab_params, verbose=False, debug=False): """ Hierarchical block for OFDM modulation @param dab_params DAB parameter object (dab.parameters.dab_parameters) @param debug enables debug output to files """ dp = dab_params gr.hier_block2.__init__(self,"ofdm_mod", gr.io_signature2(2, 2, gr.sizeof_char*dp.num_carriers/4, gr.sizeof_char), # input signature gr.io_signature (1, 1, gr.sizeof_gr_complex)) # output signature # symbol mapping self.mapper_v2s = blocks.vector_to_stream_make(gr.sizeof_char, 384) self.mapper_unpack = blocks.packed_to_unpacked_bb_make(1, gr.GR_MSB_FIRST) self.mapper = dab.mapper_bc_make(dp.num_carriers) self.mapper_s2v = blocks.stream_to_vector_make(gr.sizeof_gr_complex, 1536) # add pilot symbol self.insert_pilot = dab.ofdm_insert_pilot_vcc(dp.prn) # phase sum self.sum_phase = dab.sum_phasor_trig_vcc(dp.num_carriers) # frequency interleaving self.interleave = dab.frequency_interleaver_vcc(dp.frequency_interleaving_sequence_array) # add central carrier & move to middle self.move_and_insert_carrier = dab.ofdm_move_and_insert_zero(dp.fft_length, dp.num_carriers) # ifft self.ifft = fft.fft_vcc(dp.fft_length, False, [], True) # cyclic prefixer self.prefixer = digital.ofdm_cyclic_prefixer(dp.fft_length, dp.symbol_length) # convert back to vectors self.s2v = blocks.stream_to_vector(gr.sizeof_gr_complex, dp.symbol_length) # add null symbol self.insert_null = dab.insert_null_symbol(dp.ns_length, dp.symbol_length) # # connect it all # # data self.connect((self,0), self.mapper_v2s, self.mapper_unpack, self.mapper, self.mapper_s2v, (self.insert_pilot,0), (self.sum_phase,0), self.interleave, self.move_and_insert_carrier, self.ifft, self.prefixer, self.s2v, (self.insert_null,0)) self.connect(self.insert_null, self) # control signal (frame start) self.connect((self,1), (self.insert_pilot,1), (self.sum_phase,1), (self.insert_null,1)) if debug: #self.connect(self.mapper, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_mapper.dat")) self.connect(self.insert_pilot, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_insert_pilot.dat")) self.connect(self.sum_phase, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_sum_phase.dat")) self.connect(self.interleave, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/generated_signal_interleave.dat")) self.connect(self.move_and_insert_carrier, blocks.file_sink(gr.sizeof_gr_complex*dp.fft_length, "debug/generated_signal_move_and_insert_carrier.dat")) self.connect(self.ifft, blocks.file_sink(gr.sizeof_gr_complex*dp.fft_length, "debug/generated_signal_ifft.dat")) self.connect(self.prefixer, blocks.file_sink(gr.sizeof_gr_complex, "debug/generated_signal_prefixer.dat")) self.connect(self.insert_null, blocks.file_sink(gr.sizeof_gr_complex, "debug/generated_signal.dat"))
