<?xml version='1.0' encoding='ASCII'?>
<flow_graph>
  <timestamp>Wed Jul  9 15:50:17 2014</timestamp>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>10000</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(170, 65)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>header_formatter</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>digital.packet_header_ofdm(occupied_carriers, n_syms=1, len_tag_key=packet_length_tag_key, frame_len_tag_key=length_tag_key, bits_per_header_sym=header_mod.bits_per_symbol(), bits_per_payload_sym=payload_mod.bits_per_symbol(), scramble_header=False)</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(855, 0)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>packet_length_tag_key</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>"packet_len"</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1132, 0)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>length_tag_key</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>"frame_len"</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(367, -1)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>occupied_carriers</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>(range(-26, -21) + range(-20, -7) + range(-6, 0) + range(1, 7) + range(8, 21) + range(22, 27),)</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(541, 70)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>pilot_symbols</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>((1, 1, 1, -1,),)</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(813, 70)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>pilot_carriers</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>((-21, -7, 7, 21,),)</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(692, 70)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>packet_len</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>96</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1034, 0)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>header_mod</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>digital.constellation_bpsk()</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(490, 0)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>64</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(301, -1)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>sync_word1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>[0., 0., 0., 0., 0., 0., 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., -1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., -1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 1.41421356, 0., 0., 0., 0., 0., 0.]</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(255, 67)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>sync_word2</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>[0j, 0j, 0j, 0j, 0j, 0j, (-1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1 +0j), (1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), 0j, (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (1+0j), (1+0j), (1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (1+0j), (-1+0j), (1+0j), (-1+0j), (-1+0j), (-1+0j), (-1+0j), 0j, 0j, 0j, 0j, 0j]</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(399, 66)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>payload_equalizer</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>digital.ofdm_equalizer_simpledfe(fft_len, payload_mod.base(), occupied_carriers, pilot_carriers, pilot_symbols, 1)</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1112, 73)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>header_equalizer</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>digital.ofdm_equalizer_simpledfe(fft_len, header_mod.base(), occupied_carriers, pilot_carriers, pilot_symbols)</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(931, 69)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable</key>
    <param>
      <key>id</key>
      <value>payload_mod</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>value</key>
      <value>digital.constellation_qpsk()</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(663, 1)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>import</key>
    <param>
      <key>id</key>
      <value>import_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>import</key>
      <value>from gnuradio.digital.utils import tagged_streams</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(163, 0)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>analog_random_source_x</key>
    <param>
      <key>id</key>
      <value>analog_random_source_x_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>byte</value>
    </param>
    <param>
      <key>min</key>
      <value>0</value>
    </param>
    <param>
      <key>max</key>
      <value>255</value>
    </param>
    <param>
      <key>num_samps</key>
      <value>1000</value>
    </param>
    <param>
      <key>repeat</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(2, 167)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>analog_frequency_modulator_fc</key>
    <param>
      <key>id</key>
      <value>analog_frequency_modulator_fc_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>sensitivity</key>
      <value>-2.0/fft_len</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(920, 171)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>blocks_throttle</key>
    <param>
      <key>id</key>
      <value>blocks_throttle_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>samples_per_second</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>ignoretag</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(440, 187)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>blocks_multiply_xx</key>
    <param>
      <key>id</key>
      <value>blocks_multiply_xx_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>num_inputs</key>
      <value>2</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1117, 265)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_ofdm_sync_sc_cfb</key>
    <param>
      <key>id</key>
      <value>digital_ofdm_sync_sc_cfb_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>fft_len</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>cp_len</key>
      <value>fft_len/4</value>
    </param>
    <param>
      <key>use_even_carriers</key>
      <value>False</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(627, 175)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_packet_headerparser_b</key>
    <param>
      <key>id</key>
      <value>digital_packet_headerparser_b_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>header_formatter</key>
      <value>header_formatter.base()</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(634, 529)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>180</value>
    </param>
  </block>
  <block>
    <key>digital_constellation_decoder_cb</key>
    <param>
      <key>id</key>
      <value>digital_constellation_decoder_cb_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>constellation</key>
      <value>header_mod.base()</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(903, 530)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>180</value>
    </param>
  </block>
  <block>
    <key>fft_vxx</key>
    <param>
      <key>id</key>
      <value>fft_vxx_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>fft_size</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>forward</key>
      <value>True</value>
    </param>
    <param>
      <key>window</key>
      <value>()</value>
    </param>
    <param>
      <key>shift</key>
      <value>True</value>
    </param>
    <param>
      <key>nthreads</key>
      <value>1</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(217, 576)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>virtual_sink</key>
    <param>
      <key>id</key>
      <value>virtual_sink_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>stream_id</key>
      <value>Header Stream</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1098, 414)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>blocks_stream_to_tagged_stream</key>
    <param>
      <key>id</key>
      <value>blocks_stream_to_tagged_stream_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>byte</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>packet_len</key>
      <value>packet_len</value>
    </param>
    <param>
      <key>len_tag_key</key>
      <value>packet_length_tag_key</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(171, 182)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_ofdm_chanest_vcvc</key>
    <param>
      <key>id</key>
      <value>digital_ofdm_chanest_vcvc_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>sync_symbol1</key>
      <value>sync_word1</value>
    </param>
    <param>
      <key>sync_symbol2</key>
      <value>sync_word2</value>
    </param>
    <param>
      <key>n_data_symbols</key>
      <value>1</value>
    </param>
    <param>
      <key>eq_noise_red_len</key>
      <value>0</value>
    </param>
    <param>
      <key>max_carr_offset</key>
      <value>3</value>
    </param>
    <param>
      <key>force_one_symbol</key>
      <value>False</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(442, 584)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_ofdm_frame_equalizer_vcvc</key>
    <param>
      <key>id</key>
      <value>digital_ofdm_frame_equalizer_vcvc_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>fft_len</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>cp_len</key>
      <value>fft_len/4</value>
    </param>
    <param>
      <key>equalizer</key>
      <value>header_equalizer.base()</value>
    </param>
    <param>
      <key>len_tag_key</key>
      <value>length_tag_key</value>
    </param>
    <param>
      <key>propagate_channel_state</key>
      <value>True</value>
    </param>
    <param>
      <key>fixed_frame_len</key>
      <value>1</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(675, 577)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>virtual_source</key>
    <param>
      <key>id</key>
      <value>virtual_source_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>stream_id</key>
      <value>Payload Stream</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(0, 732)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>virtual_sink</key>
    <param>
      <key>id</key>
      <value>virtual_sink_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>stream_id</key>
      <value>Payload Stream</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1094, 470)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>virtual_source</key>
    <param>
      <key>id</key>
      <value>virtual_source_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>stream_id</key>
      <value>Header Stream</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(5, 606)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>fft_vxx</key>
    <param>
      <key>id</key>
      <value>fft_vxx_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>fft_size</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>forward</key>
      <value>True</value>
    </param>
    <param>
      <key>window</key>
      <value></value>
    </param>
    <param>
      <key>shift</key>
      <value>True</value>
    </param>
    <param>
      <key>nthreads</key>
      <value>1</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(221, 702)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_ofdm_frame_equalizer_vcvc</key>
    <param>
      <key>id</key>
      <value>digital_ofdm_frame_equalizer_vcvc_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>fft_len</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>cp_len</key>
      <value>fft_len/4</value>
    </param>
    <param>
      <key>equalizer</key>
      <value>payload_equalizer.base()</value>
    </param>
    <param>
      <key>len_tag_key</key>
      <value>length_tag_key</value>
    </param>
    <param>
      <key>propagate_channel_state</key>
      <value>True</value>
    </param>
    <param>
      <key>fixed_frame_len</key>
      <value>0</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(672, 702)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>virtual_sink</key>
    <param>
      <key>id</key>
      <value>virtual_sink_1_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>stream_id</key>
      <value>Payload IQ</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1139, 732)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_crc32_bb</key>
    <param>
      <key>id</key>
      <value>digital_crc32_bb_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>check</key>
      <value>True</value>
    </param>
    <param>
      <key>lengthtagname</key>
      <value>packet_length_tag_key</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(659, 841)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>blocks_repack_bits_bb</key>
    <param>
      <key>id</key>
      <value>blocks_repack_bits_bb_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>k</key>
      <value>payload_mod.bits_per_symbol()</value>
    </param>
    <param>
      <key>l</key>
      <value>8</value>
    </param>
    <param>
      <key>len_tag_key</key>
      <value>packet_length_tag_key</value>
    </param>
    <param>
      <key>align_output</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(430, 826)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_constellation_decoder_cb</key>
    <param>
      <key>id</key>
      <value>digital_constellation_decoder_cb_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>constellation</key>
      <value>payload_mod.base()</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(183, 848)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>virtual_source</key>
    <param>
      <key>id</key>
      <value>virtual_source_0_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>stream_id</key>
      <value>Payload IQ</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1, 851)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>blocks_tag_debug</key>
    <param>
      <key>id</key>
      <value>blocks_tag_debug_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>byte</value>
    </param>
    <param>
      <key>name</key>
      <value>Rx Bytes</value>
    </param>
    <param>
      <key>filter</key>
      <value>""</value>
    </param>
    <param>
      <key>num_inputs</key>
      <value>1</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>display</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(898, 841)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>channels_channel_model</key>
    <param>
      <key>id</key>
      <value>channels_channel_model_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>noise_voltage</key>
      <value>0.1</value>
    </param>
    <param>
      <key>freq_offset</key>
      <value>0 * 1.0/fft_len</value>
    </param>
    <param>
      <key>epsilon</key>
      <value>1.0</value>
    </param>
    <param>
      <key>taps</key>
      <value>1.0</value>
    </param>
    <param>
      <key>seed</key>
      <value>0</value>
    </param>
    <param>
      <key>block_tags</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(303, 372)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_ofdm_tx</key>
    <param>
      <key>id</key>
      <value>digital_ofdm_tx_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>fft_len</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>cp_len</key>
      <value>fft_len/4</value>
    </param>
    <param>
      <key>packet_len_key</key>
      <value>packet_length_tag_key</value>
    </param>
    <param>
      <key>occupied_carriers</key>
      <value>occupied_carriers</value>
    </param>
    <param>
      <key>pilot_carriers</key>
      <value>pilot_carriers</value>
    </param>
    <param>
      <key>pilot_symbols</key>
      <value>pilot_symbols</value>
    </param>
    <param>
      <key>sync_word1</key>
      <value>sync_word1</value>
    </param>
    <param>
      <key>sync_word2</key>
      <value>sync_word2</value>
    </param>
    <param>
      <key>header_mod</key>
      <value>"BPSK"</value>
    </param>
    <param>
      <key>payload_mod</key>
      <value>"QPSK"</value>
    </param>
    <param>
      <key>rolloff</key>
      <value>0</value>
    </param>
    <param>
      <key>scramble_bits</key>
      <value>False</value>
    </param>
    <param>
      <key>log</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(58, 327)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_header_payload_demux</key>
    <param>
      <key>id</key>
      <value>digital_header_payload_demux_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>header_len</key>
      <value>3</value>
    </param>
    <param>
      <key>items_per_symbol</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>guard_interval</key>
      <value>fft_len/4</value>
    </param>
    <param>
      <key>length_tag_key</key>
      <value>length_tag_key</value>
    </param>
    <param>
      <key>trigger_tag_key</key>
      <value>""</value>
    </param>
    <param>
      <key>output_symbols</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>timing_tag_key</key>
      <value>"rx_time"</value>
    </param>
    <param>
      <key>samp_rate</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>special_tags</key>
      <value>()</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(766, 363)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_ofdm_serializer_vcc</key>
    <param>
      <key>id</key>
      <value>digital_ofdm_serializer_vcc_header</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>fft_len</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>occupied_carriers</key>
      <value>occupied_carriers</value>
    </param>
    <param>
      <key>len_tag_key</key>
      <value>length_tag_key</value>
    </param>
    <param>
      <key>packet_len_tag_key</key>
      <value></value>
    </param>
    <param>
      <key>symbols_skipped</key>
      <value>0</value>
    </param>
    <param>
      <key>carr_offset_key</key>
      <value></value>
    </param>
    <param>
      <key>input_is_shifted</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(914, 584)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>digital_ofdm_serializer_vcc</key>
    <param>
      <key>id</key>
      <value>digital_ofdm_serializer_vcc_payload</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>fft_len</key>
      <value>fft_len</value>
    </param>
    <param>
      <key>occupied_carriers</key>
      <value>occupied_carriers</value>
    </param>
    <param>
      <key>len_tag_key</key>
      <value>length_tag_key</value>
    </param>
    <param>
      <key>packet_len_tag_key</key>
      <value>packet_length_tag_key</value>
    </param>
    <param>
      <key>symbols_skipped</key>
      <value>1</value>
    </param>
    <param>
      <key>carr_offset_key</key>
      <value></value>
    </param>
    <param>
      <key>input_is_shifted</key>
      <value>True</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(916, 710)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>blocks_delay</key>
    <param>
      <key>id</key>
      <value>blocks_delay_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>complex</value>
    </param>
    <param>
      <key>delay</key>
      <value>fft_len+fft_len/4</value>
    </param>
    <param>
      <key>num_ports</key>
      <value>1</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>affinity</key>
      <value></value>
    </param>
    <param>
      <key>minoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>maxoutbuf</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(622, 273)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>options</key>
    <param>
      <key>id</key>
      <value>rx_ofdm</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>title</key>
      <value>OFDM Rx</value>
    </param>
    <param>
      <key>author</key>
      <value></value>
    </param>
    <param>
      <key>description</key>
      <value>Example of an OFDM receiver</value>
    </param>
    <param>
      <key>window_size</key>
      <value>1280, 1024</value>
    </param>
    <param>
      <key>generate_options</key>
      <value>no_gui</value>
    </param>
    <param>
      <key>category</key>
      <value>Custom</value>
    </param>
    <param>
      <key>run_options</key>
      <value>prompt</value>
    </param>
    <param>
      <key>run</key>
      <value>True</value>
    </param>
    <param>
      <key>max_nouts</key>
      <value>0</value>
    </param>
    <param>
      <key>realtime_scheduling</key>
      <value></value>
    </param>
    <param>
      <key>alias</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1, 0)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <connection>
    <source_block_id>analog_random_source_x_0</source_block_id>
    <sink_block_id>blocks_stream_to_tagged_stream_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_stream_to_tagged_stream_0</source_block_id>
    <sink_block_id>digital_ofdm_tx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_tx_0</source_block_id>
    <sink_block_id>channels_channel_model_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>channels_channel_model_0</source_block_id>
    <sink_block_id>blocks_throttle_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_throttle_0</source_block_id>
    <sink_block_id>digital_ofdm_sync_sc_cfb_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_header_payload_demux_0</source_block_id>
    <sink_block_id>virtual_sink_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_sync_sc_cfb_0</source_block_id>
    <sink_block_id>analog_frequency_modulator_fc_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>analog_frequency_modulator_fc_0</source_block_id>
    <sink_block_id>blocks_multiply_xx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_multiply_xx_0</source_block_id>
    <sink_block_id>digital_header_payload_demux_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_throttle_0</source_block_id>
    <sink_block_id>blocks_delay_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_delay_0</source_block_id>
    <sink_block_id>blocks_multiply_xx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>1</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_sync_sc_cfb_0</source_block_id>
    <sink_block_id>digital_header_payload_demux_0</sink_block_id>
    <source_key>1</source_key>
    <sink_key>1</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_header_payload_demux_0</source_block_id>
    <sink_block_id>virtual_sink_1</sink_block_id>
    <source_key>1</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_packet_headerparser_b_0</source_block_id>
    <sink_block_id>digital_header_payload_demux_0</sink_block_id>
    <source_key>header_data</source_key>
    <sink_key>header_data</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_chanest_vcvc_0</source_block_id>
    <sink_block_id>digital_ofdm_frame_equalizer_vcvc_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_frame_equalizer_vcvc_0</source_block_id>
    <sink_block_id>digital_ofdm_serializer_vcc_header</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_serializer_vcc_header</source_block_id>
    <sink_block_id>digital_constellation_decoder_cb_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_constellation_decoder_cb_0</source_block_id>
    <sink_block_id>digital_packet_headerparser_b_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>fft_vxx_0</source_block_id>
    <sink_block_id>digital_ofdm_chanest_vcvc_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>virtual_source_0</source_block_id>
    <sink_block_id>fft_vxx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>virtual_source_1</source_block_id>
    <sink_block_id>fft_vxx_1</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_serializer_vcc_payload</source_block_id>
    <sink_block_id>virtual_sink_1_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_ofdm_frame_equalizer_vcvc_1</source_block_id>
    <sink_block_id>digital_ofdm_serializer_vcc_payload</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>fft_vxx_1</source_block_id>
    <sink_block_id>digital_ofdm_frame_equalizer_vcvc_1</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_crc32_bb_0</source_block_id>
    <sink_block_id>blocks_tag_debug_1</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>blocks_repack_bits_bb_0</source_block_id>
    <sink_block_id>digital_crc32_bb_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>virtual_source_0_0</source_block_id>
    <sink_block_id>digital_constellation_decoder_cb_1</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>digital_constellation_decoder_cb_1</source_block_id>
    <sink_block_id>blocks_repack_bits_bb_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
</flow_graph>
