Python complex_to_interleaved_float_vcf Examples

Example #1

File: qa_complex_to_interleaved_float_vcf.py Project: kantooon/gr-dab

 def test_001_complex_to_interleaved_float_vcf(self):
     src_data = (1 + 2j, 3 + 4j, 5 + 6j, 7 + 8j)
     expected_result = (1, 3, 2, 4, 5, 7, 6, 8)
     src = blocks.vector_source_c(src_data)
     s2v = blocks.stream_to_vector(gr.sizeof_gr_complex, 2)
     complex_to_interleaved_float_vcf = dab.complex_to_interleaved_float_vcf(2)
     v2s = blocks.vector_to_stream(gr.sizeof_float, 4)
     dst = blocks.vector_sink_f()
     self.tb.connect(src, s2v, complex_to_interleaved_float_vcf, v2s, dst)
     self.tb.run()
     result_data = dst.data()
     # print result_data
     self.assertFloatTuplesAlmostEqual(expected_result, result_data, 6)

Example #2

 def test_001_complex_to_interleaved_float_vcf(self):
     src_data = (1 + 2j, 3 + 4j, 5 + 6j, 7 + 8j)
     expected_result = (1, 3, 2, 4, 5, 7, 6, 8)
     src = blocks.vector_source_c(src_data)
     s2v = blocks.stream_to_vector(gr.sizeof_gr_complex, 2)
     complex_to_interleaved_float_vcf = dab.complex_to_interleaved_float_vcf(
         2)
     v2s = blocks.vector_to_stream(gr.sizeof_float, 4)
     dst = blocks.vector_sink_f()
     self.tb.connect(src, s2v, complex_to_interleaved_float_vcf, v2s, dst)
     self.tb.run()
     result_data = dst.data()
     # print result_data
     self.assertFloatTuplesAlmostEqual(expected_result, result_data, 6)

Example #3

File: ofdm.py Project: FLYKingdom/gr-dab

	def __init__(self, dab_params, rx_params, verbose=False, debug=False):
		"""
		Hierarchical block for OFDM demodulation

		@param dab_params DAB parameter object (dab.parameters.dab_parameters)
		@param rx_params RX parameter object (dab.parameters.receiver_parameters)
		@param debug enables debug output to files
		@param verbose whether to produce verbose messages
		"""

		self.dp = dp = dab_params
		self.rp = rp = rx_params
		self.verbose = verbose

		if self.rp.softbits:
			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_float*self.dp.num_carriers*2, gr.sizeof_char)) # output signature
		else:
			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_char*self.dp.num_carriers/4, gr.sizeof_char)) # output signature

		

		# workaround for a problem that prevents connecting more than one block directly (see trac ticket #161)
		#self.input = gr.kludge_copy(gr.sizeof_gr_complex)
		self.input = blocks.multiply_const_cc(1.0) # FIXME
		self.connect(self, self.input)
		
		# input filtering
		if self.rp.input_fft_filter: 
			if verbose: print "--> RX filter enabled"
			lowpass_taps = filter.firdes_low_pass(1.0,                     # gain
							  dp.sample_rate,          # sampling rate
							  rp.filt_bw,              # cutoff frequency
							  rp.filt_tb,              # width of transition band
							  filter.firdes.WIN_HAMMING)   # Hamming window
			self.fft_filter = filter.fft_filter_ccc(1, lowpass_taps)
		

		# correct sample rate offset, if enabled
		if self.rp.autocorrect_sample_rate:
			if verbose: print "--> dynamic sample rate correction enabled"
			self.rate_detect_ns = dab.detect_null(dp.ns_length, False)
			self.rate_estimator = dab.estimate_sample_rate_bf(dp.sample_rate, dp.frame_length)
			self.rate_prober = blocks.probe_signal_f()
			self.connect(self.input, self.rate_detect_ns, self.rate_estimator, self.rate_prober)
			# self.resample = gr.fractional_interpolator_cc(0, 1)
			self.resample = dab.fractional_interpolator_triggered_update_cc(0,1)
			self.connect(self.rate_detect_ns, (self.resample,1))
			self.updater = Timer(0.1,self.update_correction)
			# self.updater = threading.Thread(target=self.update_correction)
			self.run_interpolater_update_thread = True
			self.updater.setDaemon(True)
			self.updater.start()
		else:
			self.run_interpolater_update_thread = False
			if self.rp.sample_rate_correction_factor != 1:
				if verbose: print "--> static sample rate correction enabled"
				self.resample = gr.fractional_interpolator_cc(0, self.rp.sample_rate_correction_factor)

		# timing and fine frequency synchronisation
		self.sync = dab.ofdm_sync_dab2(self.dp, self.rp, debug)

		# ofdm symbol sampler
		self.sampler = dab.ofdm_sampler(dp.fft_length, dp.cp_length, dp.symbols_per_frame, rp.cp_gap)
		
		# fft for symbol vectors
		self.fft = fft.fft_vcc(dp.fft_length, True, [], True)

		# coarse frequency synchronisation
		self.cfs = dab.ofdm_coarse_frequency_correct(dp.fft_length, dp.num_carriers, dp.cp_length)

		# diff phasor
		self.phase_diff = dab.diff_phasor_vcc(dp.num_carriers)

		# remove pilot symbol
		self.remove_pilot = dab.ofdm_remove_first_symbol_vcc(dp.num_carriers)

		# magnitude equalisation
		if self.rp.equalize_magnitude:
			if verbose: print "--> magnitude equalization enabled"
			self.equalizer = dab.magnitude_equalizer_vcc(dp.num_carriers, rp.symbols_for_magnitude_equalization)

		# frequency deinterleaving
		self.deinterleave = dab.frequency_interleaver_vcc(dp.frequency_deinterleaving_sequence_array)
		
		# symbol demapping
		self.demapper = dab.qpsk_demapper_vcb(dp.num_carriers)

		#
		# connect everything
		#

		if self.rp.autocorrect_sample_rate or self.rp.sample_rate_correction_factor != 1:
			self.connect(self.input, self.resample)
			self.input2 = self.resample
		else:
			self.input2 = self.input
		if self.rp.input_fft_filter:
			self.connect(self.input2, self.fft_filter, self.sync)
		else:
			self.connect(self.input2, self.sync)

		# data stream
		self.connect((self.sync, 0), (self.sampler, 0), self.fft, (self.cfs, 0), self.phase_diff, (self.remove_pilot,0))
		if self.rp.equalize_magnitude:
			self.connect((self.remove_pilot,0), (self.equalizer,0), self.deinterleave)
		else:
			self.connect((self.remove_pilot,0), self.deinterleave)
		if self.rp.softbits:
			if verbose: print "--> using soft bits"
			self.softbit_interleaver = dab.complex_to_interleaved_float_vcf(self.dp.num_carriers)
			self.connect(self.deinterleave, self.softbit_interleaver, (self,0))
		else:
			self.connect(self.deinterleave, self.demapper, (self,0))

		# control stream
		self.connect((self.sync, 1), (self.sampler, 1), (self.cfs, 1), (self.remove_pilot,1))
		if self.rp.equalize_magnitude:
			self.connect((self.remove_pilot,1), (self.equalizer,1), (self,1))
		else:
			self.connect((self.remove_pilot,1), (self,1))
			
		# calculate an estimate of the SNR
		self.phase_var_decim   = blocks.keep_one_in_n(gr.sizeof_gr_complex*self.dp.num_carriers, self.rp.phase_var_estimate_downsample)
		self.phase_var_arg     = blocks.complex_to_arg(dp.num_carriers)
		self.phase_var_v2s     = blocks.vector_to_stream(gr.sizeof_float, dp.num_carriers)
		self.phase_var_mod     = dab.modulo_ff(pi/2)
		self.phase_var_avg_mod = filter.iir_filter_ffd([rp.phase_var_estimate_alpha], [0,1-rp.phase_var_estimate_alpha]) 
		self.phase_var_sub_avg = blocks.sub_ff()
		self.phase_var_sqr     = blocks.multiply_ff()
		self.phase_var_avg     = filter.iir_filter_ffd([rp.phase_var_estimate_alpha], [0,1-rp.phase_var_estimate_alpha]) 
		self.probe_phase_var   = blocks.probe_signal_f()
		self.connect((self.remove_pilot,0), self.phase_var_decim, self.phase_var_arg, self.phase_var_v2s, self.phase_var_mod, (self.phase_var_sub_avg,0), (self.phase_var_sqr,0))
		self.connect(self.phase_var_mod, self.phase_var_avg_mod, (self.phase_var_sub_avg,1))
		self.connect(self.phase_var_sub_avg, (self.phase_var_sqr,1))
		self.connect(self.phase_var_sqr, self.phase_var_avg, self.probe_phase_var)

		# measure processing rate
		self.measure_rate = dab.measure_processing_rate(gr.sizeof_gr_complex, 2000000) 
		self.connect(self.input, self.measure_rate)

		# debugging
		if debug:
			self.connect(self.fft, blocks.file_sink(gr.sizeof_gr_complex*dp.fft_length, "debug/ofdm_after_fft.dat"))
			self.connect((self.cfs,0), blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_after_cfs.dat"))
			self.connect(self.phase_diff, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_diff_phasor.dat"))
			self.connect((self.remove_pilot,0), blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_pilot_removed.dat"))
			self.connect((self.remove_pilot,1), blocks.file_sink(gr.sizeof_char, "debug/ofdm_after_cfs_trigger.dat"))
			self.connect(self.deinterleave, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_deinterleaved.dat"))
			if self.rp.equalize_magnitude:
				self.connect(self.equalizer, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_equalizer.dat"))
			if self.rp.softbits:
				self.connect(self.softbit_interleaver, blocks.file_sink(gr.sizeof_float*dp.num_carriers*2, "debug/softbits.dat"))

Example #4

File: ofdm.py Project: noc0lour/gr-dab

	def __init__(self, dab_params, rx_params, verbose=False, debug=False):
		"""
		Hierarchical block for OFDM demodulation

		@param dab_params DAB parameter object (dab.parameters.dab_parameters)
		@param rx_params RX parameter object (dab.parameters.receiver_parameters)
		@param debug enables debug output to files
		@param verbose whether to produce verbose messages
		"""

		self.dp = dp = dab_params
		self.rp = rp = rx_params
		self.verbose = verbose

		if self.rp.softbits:
			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_float*self.dp.num_carriers*2, gr.sizeof_char)) # output signature
		else:
			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_char*self.dp.num_carriers/4, gr.sizeof_char)) # output signature

		

		# workaround for a problem that prevents connecting more than one block directly (see trac ticket #161)
		#self.input = gr.kludge_copy(gr.sizeof_gr_complex)
		self.input = blocks.multiply_const_cc(1.0) # FIXME
		self.connect(self, self.input)
		
		# input filtering
		if self.rp.input_fft_filter: 
			if verbose: print "--> RX filter enabled"
			lowpass_taps = filter.firdes_low_pass(1.0,                     # gain
							  dp.sample_rate,          # sampling rate
							  rp.filt_bw,              # cutoff frequency
							  rp.filt_tb,              # width of transition band
							  filter.firdes.WIN_HAMMING)   # Hamming window
			self.fft_filter = filter.fft_filter_ccc(1, lowpass_taps)
		

		# correct sample rate offset, if enabled
		if self.rp.autocorrect_sample_rate:
			if verbose: print "--> dynamic sample rate correction enabled"
			self.rate_detect_ns = dab.detect_null(dp.ns_length, False)
			self.rate_estimator = dab.estimate_sample_rate_bf(dp.sample_rate, dp.frame_length)
			self.rate_prober = blocks.probe_signal_f()
			self.connect(self.input, self.rate_detect_ns, self.rate_estimator, self.rate_prober)
			# self.resample = gr.fractional_interpolator_cc(0, 1)
			self.resample = dab.fractional_interpolator_triggered_update_cc(0,1)
			self.connect(self.rate_detect_ns, (self.resample,1))
			self.updater = Timer(0.1,self.update_correction)
			# self.updater = threading.Thread(target=self.update_correction)
			self.run_interpolater_update_thread = True
			self.updater.setDaemon(True)
			self.updater.start()
		else:
			self.run_interpolater_update_thread = False
			if self.rp.sample_rate_correction_factor != 1:
				if verbose: print "--> static sample rate correction enabled"
				self.resample = gr.fractional_interpolator_cc(0, self.rp.sample_rate_correction_factor)

		# timing and fine frequency synchronisation
		self.sync = dab.ofdm_sync_dab2(self.dp, self.rp, debug)

		# ofdm symbol sampler
		self.sampler = dab.ofdm_sampler(dp.fft_length, dp.cp_length, dp.symbols_per_frame, rp.cp_gap)
		
		# fft for symbol vectors
		self.fft = fft.fft_vcc(dp.fft_length, True, [], True)

		# coarse frequency synchronisation
		self.cfs = dab.ofdm_coarse_frequency_correct(dp.fft_length, dp.num_carriers, dp.cp_length)

		# diff phasor
		self.phase_diff = dab.diff_phasor_vcc(dp.num_carriers)

		# remove pilot symbol
		self.remove_pilot = dab.ofdm_remove_first_symbol_vcc(dp.num_carriers)

		# magnitude equalisation
		if self.rp.equalize_magnitude:
			if verbose: print "--> magnitude equalization enabled"
			self.equalizer = dab.magnitude_equalizer_vcc(dp.num_carriers, rp.symbols_for_magnitude_equalization)

		# frequency deinterleaving
		self.deinterleave = dab.frequency_interleaver_vcc(dp.frequency_deinterleaving_sequence_array)
		
		# symbol demapping
		self.demapper = dab.qpsk_demapper_vcb(dp.num_carriers)

		#
		# connect everything
		#

		if self.rp.autocorrect_sample_rate or self.rp.sample_rate_correction_factor != 1:
			self.connect(self.input, self.resample)
			self.input2 = self.resample
		else:
			self.input2 = self.input
		if self.rp.input_fft_filter:
			self.connect(self.input2, self.fft_filter, self.sync)
		else:
			self.connect(self.input2, self.sync)

		# data stream
		self.connect((self.sync, 0), (self.sampler, 0), self.fft, (self.cfs, 0), self.phase_diff, (self.remove_pilot,0))
		if self.rp.equalize_magnitude:
			self.connect((self.remove_pilot,0), (self.equalizer,0), self.deinterleave)
		else:
			self.connect((self.remove_pilot,0), self.deinterleave)
		if self.rp.softbits:
			if verbose: print "--> using soft bits"
			self.softbit_interleaver = dab.complex_to_interleaved_float_vcf(self.dp.num_carriers)
			self.connect(self.deinterleave, self.softbit_interleaver, (self,0))
		else:
			self.connect(self.deinterleave, self.demapper, (self,0))

		# control stream
		self.connect((self.sync, 1), (self.sampler, 1), (self.cfs, 1), (self.remove_pilot,1))
		if self.rp.equalize_magnitude:
			self.connect((self.remove_pilot,1), (self.equalizer,1), (self,1))
		else:
			self.connect((self.remove_pilot,1), (self,1))
			
		# calculate an estimate of the SNR
		self.phase_var_decim   = blocks.keep_one_in_n(gr.sizeof_gr_complex*self.dp.num_carriers, self.rp.phase_var_estimate_downsample)
		self.phase_var_arg     = blocks.complex_to_arg(dp.num_carriers)
		self.phase_var_v2s     = blocks.vector_to_stream(gr.sizeof_float, dp.num_carriers)
		self.phase_var_mod     = dab.modulo_ff(pi/2)
		self.phase_var_avg_mod = filter.iir_filter_ffd([rp.phase_var_estimate_alpha], [0,1-rp.phase_var_estimate_alpha]) 
		self.phase_var_sub_avg = blocks.sub_ff()
		self.phase_var_sqr     = blocks.multiply_ff()
		self.phase_var_avg     = filter.iir_filter_ffd([rp.phase_var_estimate_alpha], [0,1-rp.phase_var_estimate_alpha]) 
		self.probe_phase_var   = blocks.probe_signal_f()
		self.connect((self.remove_pilot,0), self.phase_var_decim, self.phase_var_arg, self.phase_var_v2s, self.phase_var_mod, (self.phase_var_sub_avg,0), (self.phase_var_sqr,0))
		self.connect(self.phase_var_mod, self.phase_var_avg_mod, (self.phase_var_sub_avg,1))
		self.connect(self.phase_var_sub_avg, (self.phase_var_sqr,1))
		self.connect(self.phase_var_sqr, self.phase_var_avg, self.probe_phase_var)

		# measure processing rate
		self.measure_rate = dab.measure_processing_rate(gr.sizeof_gr_complex, 2000000) 
		self.connect(self.input, self.measure_rate)

		# debugging
		if debug:
			self.connect(self.fft, blocks.file_sink(gr.sizeof_gr_complex*dp.fft_length, "debug/ofdm_after_fft.dat"))
			self.connect((self.cfs,0), blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_after_cfs.dat"))
			self.connect(self.phase_diff, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_diff_phasor.dat"))
			self.connect((self.remove_pilot,0), blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_pilot_removed.dat"))
			self.connect((self.remove_pilot,1), blocks.file_sink(gr.sizeof_char, "debug/ofdm_after_cfs_trigger.dat"))
			self.connect(self.deinterleave, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_deinterleaved.dat"))
			if self.rp.equalize_magnitude:
				self.connect(self.equalizer, blocks.file_sink(gr.sizeof_gr_complex*dp.num_carriers, "debug/ofdm_equalizer.dat"))
			if self.rp.softbits:
				self.connect(self.softbit_interleaver, blocks.file_sink(gr.sizeof_float*dp.num_carriers*2, "debug/softbits.dat"))