Exemplo n.º 1
0
  def test_002 (self):
    l = [10,8,12,9,4,9,2,1,4,6,5]
    
    ref = []
    for x in l:
      ref.append(concatenate([[0]*(x-1),[1]]))
    ref = concatenate(ref)
    
    dst = gr.vector_sink_b()
    src = gr.vector_source_i(l)
    uut = ofdm.dynamic_trigger_ib(False)

    self.fg.connect(src, uut, dst)
    self.fg.run()

    d = dst.data()
    self.assertEqual(list(ref),list(d))
Exemplo n.º 2
0
    def test_002(self):
        l = [10, 8, 12, 9, 4, 9, 2, 1, 4, 6, 5]

        ref = []
        for x in l:
            ref.append(concatenate([[0] * (x - 1), [1]]))
        ref = concatenate(ref)

        dst = gr.vector_sink_b()
        src = gr.vector_source_i(l)
        uut = ofdm.dynamic_trigger_ib(False)

        self.fg.connect(src, uut, dst)
        self.fg.run()

        d = dst.data()
        self.assertEqual(list(ref), list(d))
Exemplo n.º 3
0
  def publish_rx_performance_measure(self):
    if self._rx_performance_measure_initialized():
      return

    self.rx_performance_measure_initialized = True

    config = station_configuration()
    vlen = config.data_subcarriers
    vlen_sinr_sc = config.subcarriers

    if self.ideal2 is False:
        self.setup_ber_measurement()
        self.setup_snr_measurement()
        ber_mst = self._ber_measuring_tool
    
    if self._options.sinr_est:
        sinr_mst = self._sinr_measurement
    else:
        if self.ideal2 is False:
            snr_mst = self._snr_measurement

    if self.ideal is False and self.ideal2 is False:
        self.ctf = self.filter_ctf()
        self.zmq_probe_ctf = zeromq.pub_sink(gr.sizeof_float,config.data_subcarriers, "tcp://*:5559")
        self.connect(self.ctf, blocks.keep_one_in_n(gr.sizeof_float*config.data_subcarriers,20) ,self.zmq_probe_ctf)
    else:
        #self.zmq_probe_ctf = zeromq.pub_sink(gr.sizeof_float,config.subcarriers, "tcp://*:5559")
        self.connect(self.ctf,blocks.null_sink(gr.sizeof_float*config.subcarriers))
        #self.rx_per_sink = rpsink = corba_rxinfo_sink("himalaya",config.ns_ip,
#                                    config.ns_port,vlen,config.rx_station_id)



#      print "BER img xfer"
#      self.connect(ber_mst,(rpsink,3))
#      ## no sampling needed
      # 3. SNR

    if self.ideal2 is False:
        print "Normal BER measurement"
    
        trig_src = dynamic_trigger_ib(False)
        self.connect(self.bitcount_src,trig_src)
        
        ber_sampler = vector_sampler(gr.sizeof_float,1)
        self.connect(ber_mst,(ber_sampler,0))
        self.connect(trig_src,(ber_sampler,1))
    else:
        if(self._options.coding):
            demod = self._data_decoder
        else:
            demod = self._data_demodulator
        self.connect(self.bitcount_src,blocks.null_sink(gr.sizeof_int) )
        self.connect(demod,blocks.null_sink(gr.sizeof_char))
    
    
    if self._options.log:
          trig_src_float = gr.char_to_float()
          self.connect(trig_src,trig_src_float)
          log_to_file(self, trig_src_float , 'data/dynamic_trigger_out.float')
    
    
    if self._options.sinr_est is False and self.ideal2 is False:
          self.zmq_probe_ber = zeromq.pub_sink(gr.sizeof_float, 1, "tcp://*:5556")
          self.connect(ber_sampler,blocks.keep_one_in_n(gr.sizeof_float,20) ,self.zmq_probe_ber)
    
          if self.ideal2 is False:
              self.zmq_probe_snr = zeromq.pub_sink(gr.sizeof_float, 1, "tcp://*:5555")
              self.connect(snr_mst,blocks.keep_one_in_n(gr.sizeof_float,20) ,self.zmq_probe_snr)
Exemplo n.º 4
0
  def publish_rx_performance_measure(self):
    if self._rx_performance_measure_initialized():
      return

    self.rx_performance_measure_initialized = True

    config = station_configuration()
    vlen = config.data_subcarriers
    vlen_sinr_sc = config.subcarriers

#    self.rx_per_sink = rpsink = rpsink_dummy()

    self.setup_ber_measurement()
    self.setup_snr_measurement()
    self.setup_snr_measurement_2()

    ber_mst = self._ber_measuring_tool
    if self._options.sinr_est:
        sinr_mst = self._sinr_measurement
        sinr_mst_2 = self._sinr_measurement_2
    else:
        snr_mst = self._snr_measurement
        snr_mst_2 = self._snr_measurement_2

    # 1. frame id

    # 2. channel transfer function
    ctf = self.filter_ctf()
    ctf_2 = self.filter_ctf_2()
    
    self.zmq_probe_ctf = zeromq.pub_sink(gr.sizeof_float,config.data_subcarriers, "tcp://*:5559")
    self.zmq_probe_ctf_2 = zeromq.pub_sink(gr.sizeof_float,config.data_subcarriers, "tcp://*:5558")
    self.connect(ctf, blocks.keep_one_in_n(gr.sizeof_float*config.data_subcarriers,20) ,self.zmq_probe_ctf)
    self.connect(ctf_2, blocks.keep_one_in_n(gr.sizeof_float*config.data_subcarriers,20) ,self.zmq_probe_ctf_2)
    
    # 3. BER
    ### FIXME HACK


    print "Normal BER measurement"


    trig_src = dynamic_trigger_ib(False)
    self.connect(self.bitcount_src,trig_src)

    ber_sampler = vector_sampler(gr.sizeof_float,1)
    self.connect(ber_mst,(ber_sampler,0))
    self.connect(trig_src,(ber_sampler,1))
      
    if self._options.log:
          trig_src_float = gr.char_to_float()
          self.connect(trig_src,trig_src_float)
          log_to_file(self, trig_src_float , 'data/dynamic_trigger_out.float')


    if self._options.sinr_est is False:
          self.zmq_probe_ber = zeromq.pub_sink(gr.sizeof_float, 1, "tcp://*:5556")
          self.connect(ber_sampler,blocks.keep_one_in_n(gr.sizeof_float,20) ,self.zmq_probe_ber)

          self.zmq_probe_snr = zeromq.pub_sink(gr.sizeof_float, 1, "tcp://*:5555")
          self.connect(snr_mst,blocks.keep_one_in_n(gr.sizeof_float,20) ,self.zmq_probe_snr)
          
          self.zmq_probe_snr_2 = zeromq.pub_sink(gr.sizeof_float, 1, "tcp://*:5554")
          self.connect(snr_mst_2,blocks.keep_one_in_n(gr.sizeof_float,20) ,self.zmq_probe_snr_2)
Exemplo n.º 5
0
    def __init__(self):
        gr.top_block.__init__(self, "Top Block")
        Qt.QWidget.__init__(self)
        self.setWindowTitle("Top Block")
        try:
             self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
        except:
             pass
        self.top_scroll_layout = Qt.QVBoxLayout()
        self.setLayout(self.top_scroll_layout)
        self.top_scroll = Qt.QScrollArea()
        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
        self.top_scroll_layout.addWidget(self.top_scroll)
        self.top_scroll.setWidgetResizable(True)
        self.top_widget = Qt.QWidget()
        self.top_scroll.setWidget(self.top_widget)
        self.top_layout = Qt.QVBoxLayout(self.top_widget)
        self.top_grid_layout = Qt.QGridLayout()
        self.top_layout.addLayout(self.top_grid_layout)

        self.settings = Qt.QSettings("GNU Radio", "top_block")
        self.restoreGeometry(self.settings.value("geometry").toByteArray())


        ##################################################
        # Variables
        ##################################################
        self.used_id_bits = used_id_bits = 8
        self.subcarriers = subcarriers = 208
        self.id_blocks = id_blocks = 1
        self.fft_length = fft_length = 256
        self.fbmc = fbmc = 1
        self.estimation_preamble = estimation_preamble = 0
        self.data_blocks = data_blocks = 10
        self.training_data = training_data = default_block_header(subcarriers,fft_length,fbmc,estimation_preamble,[])
        self.repeated_id_bits = repeated_id_bits = subcarriers/used_id_bits
        self.data_part = data_part = data_blocks + id_blocks
        self.whitener_seed = whitener_seed = seed(1)
        self.whitener_pn = whitener_pn = [randint(0,1) for i in range(used_id_bits*repeated_id_bits)]
        self.variable_function_probe_2 = variable_function_probe_2 = 0
        self.variable_function_probe_1 = variable_function_probe_1 = 0
        self.variable_function_probe_0 = variable_function_probe_0 = 0
        self.tx_hostname = tx_hostname = "localhost"
        self.samp_rate = samp_rate = 4*250000
        self.interleaver = interleaver = trellis.interleaver(2000,666)
        self.frame_length = frame_length = 2*data_part + training_data.fbmc_no_preambles
        self.filter_length = filter_length = 4
        self.disable_freq_sync = disable_freq_sync = 1
        self.coding = coding = 1
        self.chunkdivisor = chunkdivisor = int(numpy.ceil(data_blocks/5.0))
        self.ber_window = ber_window = 100000
        self.amplitude = amplitude = 1
        self.SNR = SNR = 40

        ##################################################
        # Blocks
        ##################################################
        self._amplitude_layout = Qt.QVBoxLayout()
        self._amplitude_tool_bar = Qt.QToolBar(self)
        self._amplitude_layout.addWidget(self._amplitude_tool_bar)
        self._amplitude_tool_bar.addWidget(Qt.QLabel("amplitude"+": "))
        class qwt_counter_pyslot(Qwt.QwtCounter):
            def __init__(self, parent=None):
                Qwt.QwtCounter.__init__(self, parent)
            @pyqtSlot('double')
            def setValue(self, value):
                super(Qwt.QwtCounter, self).setValue(value)
        self._amplitude_counter = qwt_counter_pyslot()
        self._amplitude_counter.setRange(0, 1, 0.02)
        self._amplitude_counter.setNumButtons(2)
        self._amplitude_counter.setValue(self.amplitude)
        self._amplitude_tool_bar.addWidget(self._amplitude_counter)
        self._amplitude_counter.valueChanged.connect(self.set_amplitude)
        self._amplitude_slider = Qwt.QwtSlider(None, Qt.Qt.Horizontal, Qwt.QwtSlider.BottomScale, Qwt.QwtSlider.BgSlot)
        self._amplitude_slider.setRange(0, 1, 0.02)
        self._amplitude_slider.setValue(self.amplitude)
        self._amplitude_slider.setMinimumWidth(200)
        self._amplitude_slider.valueChanged.connect(self.set_amplitude)
        self._amplitude_layout.addWidget(self._amplitude_slider)
        self.top_layout.addLayout(self._amplitude_layout)
        self.tx_rpc_manager_0 = tx_rpc_manager(fft_length, subcarriers, data_blocks, frame_length, 0, 0.0, samp_rate)
        self.tigr_transmit_control_0 = tigr_transmit_control(
            subcarriers=subcarriers,
            fft_length=fft_length,
            used_id_bits=used_id_bits,
            estimation_preamble=estimation_preamble,
            filter_length=filter_length,
            fbmc=fbmc,
            data_blocks=data_blocks,
            data_part=data_part,
            repeated_id_bits=repeated_id_bits,
            coding=coding,
        )
        self.tigr_scatterplot_0 = tigr_scatterplot(
            subcarriers=subcarriers,
            fbmc=fbmc,
            fft_length=fft_length,
            estimation_preamble=estimation_preamble,
            data_blocks=data_blocks,
            data_part=11,
            frame_length=frame_length,
        )
        self.rx_rpc_manager_0 = rx_rpc_manager()
        self.rms = fbmc_rms_amplifier(amplitude, subcarriers)
        self.zeromq_pub_sink_1 = zeromq.pub_sink(gr.sizeof_float, subcarriers, "tcp://*:5559", 100)
        self.zeromq_pub_sink_0 = zeromq.pub_sink(gr.sizeof_float, 1, "tcp://*:5557", 100)
        def _variable_function_probe_2_probe():
            while True:
                val = self.rx_rpc_manager_0.add_set_scatter_subcarrier_interface(self.tigr_scatterplot_0.ofdm_vector_element_0.set_element)
                try:
                    self.set_variable_function_probe_2(val)
                except AttributeError:
                    pass
                time.sleep(1.0 / (0.000000001))
        _variable_function_probe_2_thread = threading.Thread(target=_variable_function_probe_2_probe)
        _variable_function_probe_2_thread.daemon = True
        _variable_function_probe_2_thread.start()
        def _variable_function_probe_1_probe():
            while True:
                val = self.tx_rpc_manager_0.add_tx_modulation_interface(self.tigr_transmit_control_0.ofdm_allocation_src_0.set_allocation)
                try:
                    self.set_variable_function_probe_1(val)
                except AttributeError:
                    pass
                time.sleep(1.0 / (0.000000001))
        _variable_function_probe_1_thread = threading.Thread(target=_variable_function_probe_1_probe)
        _variable_function_probe_1_thread.daemon = True
        _variable_function_probe_1_thread.start()
        def _variable_function_probe_0_probe():
            while True:
                val = self.tx_rpc_manager_0.add_tx_ampl_interface(self.rms.set_rms_amplitude)
                try:
                    self.set_variable_function_probe_0(val)
                except AttributeError:
                    pass
                time.sleep(1.0 / (0.000000001))
        _variable_function_probe_0_thread = threading.Thread(target=_variable_function_probe_0_probe)
        _variable_function_probe_0_thread.daemon = True
        _variable_function_probe_0_thread.start()
        self.trellis_permutation_0 = trellis.permutation(interleaver.K(), (interleaver.DEINTER()), 1, gr.sizeof_float*1)
        self.tigr_fbmc_snr_estimator_0 = tigr_fbmc_snr_estimator(
            subcarriers=subcarriers,
            fbmc=fbmc,
            fft_length=fft_length,
            estimation_preamble=estimation_preamble,
            frame_length=frame_length,
        )
        self.tigr_fbmc_inner_receiver_0 = tigr_fbmc_inner_receiver(
            subcarriers=subcarriers,
            fft_length=fft_length,
            data_blocks=data_blocks,
            estimation_preamble=estimation_preamble,
            filter_length=filter_length,
            frame_length=frame_length,
            disable_freq_sync=disable_freq_sync,
        )
        self.tigr_ber_measurement_0 = tigr_ber_measurement(
            subcarriers=subcarriers,
            fbmc=fbmc,
            fft_length=fft_length,
            estimation_preamble=estimation_preamble,
            ber_window=ber_window,
            data_blocks=data_blocks,
        )
        self.single_pole_iir_filter_xx_0 = filter.single_pole_iir_filter_ff(0.1, subcarriers)
        self.ofdm_viterbi_combined_fb_0 = ofdm.viterbi_combined_fb(ofdm.fsm(ofdm.fsm(1,2,[91,121])), subcarriers, -1, -1, 2, chunkdivisor, ([-1,-1,-1,1,1,-1,1,1]), ofdm.TRELLIS_EUCLIDEAN)
        self.ofdm_vector_sampler_0 = ofdm.vector_sampler(gr.sizeof_gr_complex*subcarriers, 1)
        self.ofdm_vector_padding_0 = ofdm.vector_padding(subcarriers, fft_length,  -1)
        self.ofdm_multiply_frame_fc_0 = ofdm.multiply_frame_fc(data_part, subcarriers)
        self.ofdm_multiply_const_ii_0 = ofdm.multiply_const_ii(1./int(numpy.ceil(data_blocks/5.0)))
        self.ofdm_generic_softdemapper_vcf_0 = ofdm.generic_softdemapper_vcf(subcarriers, data_part, 1)
        self.ofdm_fbmc_separate_vcvc_1 = ofdm.fbmc_separate_vcvc(fft_length, 2)
        self.ofdm_fbmc_polyphase_network_vcvc_1 = ofdm.fbmc_polyphase_network_vcvc(fft_length, filter_length, filter_length*fft_length-1, False)
        self.ofdm_fbmc_polyphase_network_vcvc_0 = ofdm.fbmc_polyphase_network_vcvc(fft_length, filter_length, filter_length*fft_length-1, False)
        self.ofdm_fbmc_pilot_block_inserter_0 = fbmc_pilot_block_inserter(subcarriers, data_part, training_data, 5)
        self.ofdm_fbmc_pilot_block_filter_0 = fbmc_pilot_block_filter(subcarriers, frame_length, data_part, training_data)
        self.ofdm_fbmc_overlapping_parallel_to_serial_vcc_0 = ofdm.fbmc_overlapping_parallel_to_serial_vcc(fft_length)
        self.ofdm_fbmc_oqam_preprocessing_vcvc_0 = ofdm.fbmc_oqam_preprocessing_vcvc(subcarriers, 0, 0)
        self.ofdm_fbmc_frame_sampler_0 = fbmc_frame_sampler(subcarriers, frame_length, data_part, training_data)
        self.ofdm_fbmc_beta_multiplier_vcvc_0 = ofdm.fbmc_beta_multiplier_vcvc(fft_length, filter_length, fft_length*fft_length-1, 0)
        self.ofdm_dynamic_trigger_ib_0 = ofdm.dynamic_trigger_ib(0)
        self.ofdm_depuncture_ff_0 = ofdm.depuncture_ff(subcarriers, 0)
        self.ofdm_coded_bpsk_soft_decoder_0 = ofdm.coded_bpsk_soft_decoder(subcarriers, used_id_bits, (whitener_pn))
        self.ofdm_allocation_buffer_0 = ofdm.allocation_buffer(subcarriers, data_blocks, "tcp://"+tx_hostname+":3333", 1)
        self.fft_vxx_1 = fft.fft_vcc(fft_length, False, ([]), True, 1)
        self.channels_channel_model_0 = channels.channel_model(
        	noise_voltage=math.sqrt(1.0*fft_length/subcarriers)*math.sqrt(0.5)*10**(-SNR/20.0),
        	frequency_offset=0.0/fft_length,
        	epsilon=1,
        	taps=((1.0 ), ),
        	noise_seed=0,
        	block_tags=False
        )
        self.blocks_vector_source_x_0 = blocks.vector_source_b([1] + [0]*(data_blocks/2-1), True, 1, [])
        self.blocks_throttle_0 = blocks.throttle(gr.sizeof_gr_complex*1, samp_rate,True)
        self.blocks_keep_one_in_n_1 = blocks.keep_one_in_n(gr.sizeof_float*subcarriers, 20)
        self.blks2_selector_0 = grc_blks2.selector(
        	item_size=gr.sizeof_float*1,
        	num_inputs=2,
        	num_outputs=1,
        	input_index=0,
        	output_index=0,
        )

        ##################################################
        # Connections
        ##################################################
        self.connect((self.ofdm_fbmc_polyphase_network_vcvc_0, 0), (self.ofdm_fbmc_overlapping_parallel_to_serial_vcc_0, 0))
        self.connect((self.ofdm_fbmc_polyphase_network_vcvc_1, 0), (self.ofdm_fbmc_overlapping_parallel_to_serial_vcc_0, 1))
        self.connect((self.ofdm_fbmc_separate_vcvc_1, 1), (self.ofdm_fbmc_polyphase_network_vcvc_1, 0))
        self.connect((self.ofdm_fbmc_oqam_preprocessing_vcvc_0, 0), (self.ofdm_fbmc_pilot_block_inserter_0, 0))
        self.connect((self.ofdm_fbmc_pilot_block_inserter_0, 0), (self.ofdm_vector_padding_0, 0))
        self.connect((self.ofdm_fbmc_beta_multiplier_vcvc_0, 0), (self.fft_vxx_1, 0))
        self.connect((self.fft_vxx_1, 0), (self.ofdm_fbmc_separate_vcvc_1, 0))
        self.connect((self.tigr_transmit_control_0, 0), (self.ofdm_fbmc_oqam_preprocessing_vcvc_0, 0))
        self.connect((self.single_pole_iir_filter_xx_0, 0), (self.blocks_keep_one_in_n_1, 0))
        self.connect((self.ofdm_fbmc_frame_sampler_0, 1), (self.ofdm_fbmc_pilot_block_filter_0, 1))
        self.connect((self.ofdm_fbmc_frame_sampler_0, 0), (self.ofdm_fbmc_pilot_block_filter_0, 0))
        self.connect((self.ofdm_fbmc_pilot_block_filter_0, 1), (self.ofdm_vector_sampler_0, 1))
        self.connect((self.ofdm_vector_sampler_0, 0), (self.ofdm_coded_bpsk_soft_decoder_0, 0))
        self.connect((self.ofdm_coded_bpsk_soft_decoder_0, 0), (self.ofdm_allocation_buffer_0, 0))
        self.connect((self.ofdm_allocation_buffer_0, 1), (self.ofdm_generic_softdemapper_vcf_0, 1))
        self.connect((self.single_pole_iir_filter_xx_0, 0), (self.ofdm_generic_softdemapper_vcf_0, 2))
        self.connect((self.ofdm_generic_softdemapper_vcf_0, 0), (self.trellis_permutation_0, 0))
        self.connect((self.ofdm_depuncture_ff_0, 0), (self.ofdm_viterbi_combined_fb_0, 0))
        self.connect((self.ofdm_allocation_buffer_0, 1), (self.ofdm_depuncture_ff_0, 1))
        self.connect((self.blocks_vector_source_x_0, 0), (self.ofdm_depuncture_ff_0, 2))
        self.connect((self.ofdm_allocation_buffer_0, 0), (self.ofdm_multiply_const_ii_0, 0))
        self.connect((self.ofdm_multiply_const_ii_0, 0), (self.ofdm_viterbi_combined_fb_0, 1))
        self.connect((self.ofdm_fbmc_separate_vcvc_1, 0), (self.ofdm_fbmc_polyphase_network_vcvc_0, 0))
        self.connect((self.ofdm_viterbi_combined_fb_0, 0), (self.tigr_ber_measurement_0, 2))
        self.connect((self.ofdm_dynamic_trigger_ib_0, 0), (self.tigr_ber_measurement_0, 3))
        self.connect((self.ofdm_fbmc_frame_sampler_0, 0), (self.tigr_fbmc_snr_estimator_0, 0))
        self.connect((self.ofdm_fbmc_frame_sampler_0, 1), (self.tigr_fbmc_snr_estimator_0, 1))
        self.connect((self.tigr_fbmc_inner_receiver_0, 1), (self.ofdm_fbmc_frame_sampler_0, 1))
        self.connect((self.tigr_fbmc_inner_receiver_0, 2), (self.ofdm_fbmc_frame_sampler_0, 0))
        self.connect((self.rms, 0), (self.blocks_throttle_0, 0))
        self.connect((self.tigr_fbmc_inner_receiver_0, 3), (self.zeromq_pub_sink_0, 0))
        self.connect((self.blocks_keep_one_in_n_1, 0), (self.zeromq_pub_sink_1, 0))
        self.connect((self.ofdm_vector_padding_0, 0), (self.ofdm_fbmc_beta_multiplier_vcvc_0, 0))
        self.connect((self.tigr_fbmc_inner_receiver_0, 0), (self.single_pole_iir_filter_xx_0, 0))
        self.connect((self.ofdm_fbmc_overlapping_parallel_to_serial_vcc_0, 0), (self.rms, 0))
        self.connect((self.ofdm_allocation_buffer_0, 0), (self.ofdm_dynamic_trigger_ib_0, 0))
        self.connect((self.ofdm_coded_bpsk_soft_decoder_0, 0), (self.tigr_ber_measurement_0, 0))
        self.connect((self.ofdm_allocation_buffer_0, 0), (self.tigr_ber_measurement_0, 1))
        self.connect((self.blks2_selector_0, 0), (self.ofdm_depuncture_ff_0, 0))
        self.connect((self.trellis_permutation_0, 0), (self.blks2_selector_0, 1))
        self.connect((self.ofdm_generic_softdemapper_vcf_0, 0), (self.blks2_selector_0, 0))
        self.connect((self.blocks_throttle_0, 0), (self.channels_channel_model_0, 0))
        self.connect((self.channels_channel_model_0, 0), (self.tigr_fbmc_inner_receiver_0, 0))
        self.connect((self.ofdm_fbmc_pilot_block_filter_0, 0), (self.ofdm_vector_sampler_0, 0))
        self.connect((self.ofdm_allocation_buffer_0, 2), (self.ofdm_multiply_frame_fc_0, 1))
        self.connect((self.ofdm_fbmc_pilot_block_filter_0, 0), (self.ofdm_multiply_frame_fc_0, 0))
        self.connect((self.ofdm_multiply_frame_fc_0, 0), (self.tigr_scatterplot_0, 0))
        self.connect((self.ofdm_multiply_frame_fc_0, 0), (self.ofdm_generic_softdemapper_vcf_0, 0))