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<value>const</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>digital.qpsk_constellation()</value> </param> <param> <key>_coordinate</key> <value>(336, -2)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>rrctaps</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>firdes.root_raised_cosine(nfilts,1.0,1.0/(spb*nfilts), rolloff, int(11*spb*nfilts))</value> </param> <param> <key>_coordinate</key> <value>(686, -1)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable</key> <param> <key>id</key> <value>rolloff</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>value</key> <value>0.35</value> </param> <param> <key>_coordinate</key> <value>(607, -1)</value> </param> <param> <key>_rotation</key> <value>0</value> 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<key>dimension</key> <value>1</value> </param> <param> <key>num_ports</key> <value>1</value> </param> <param> <key>_coordinate</key> <value>(196, 87)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>blks2_pfb_arb_resampler_ccf</key> <param> <key>id</key> <value>blks2_pfb_arb_resampler_ccf_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>rate</key> <value>spb</value> </param> <param> <key>taps</key> <value>firdes.root_raised_cosine(32, 32, 1.0, 0.35, 44*32)</value> </param> <param> <key>size</key> <value>32</value> </param> <param> <key>_coordinate</key> <value>(435, 80)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>gr_channel_model</key> <param> <key>id</key> <value>gr_channel_model_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>noise_voltage</key> <value>noise_amp</value> </param> <param> <key>freq_offset</key> 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<param> <key>samples_per_second</key> <value>samp_rate</value> </param> <param> <key>vlen</key> <value>1</value> </param> <param> <key>_coordinate</key> <value>(857, 95)</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>input_signal_probe</value> </param> <param> <key>_coordinate</key> <value>(835, 562)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>digital_costas_loop_cc</key> <param> <key>id</key> <value>digital_costas_loop_cc_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>w</key> <value>phase_bw</value> </param> <param> <key>order</key> <value>4</value> </param> <param> <key>_coordinate</key> <value>(866, 246)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>wxgui_scopesink2</key> <param> <key>id</key> <value>wxgui_scopesink2_0_0_1</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>title</key> <value>Pre-sync Signal</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>v_scale</key> <value>.5</value> </param> <param> <key>v_offset</key> <value>0</value> </param> <param> <key>t_scale</key> <value>0</value> </param> <param> <key>ac_couple</key> <value>False</value> </param> <param> <key>xy_mode</key> <value>False</value> </param> <param> <key>num_inputs</key> <value>1</value> </param> <param> <key>win_size</key> <value></value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>notebook</key> <value>notebook_0,1</value> </param> <param> <key>trig_mode</key> <value>gr.gr_TRIG_MODE_AUTO</value> </param> <param> <key>y_axis_label</key> <value>Counts</value> </param> <param> <key>_coordinate</key> <value>(1081, 439)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>wxgui_fftsink2</key> <param> <key>id</key> <value>wxgui_fftsink2_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>title</key> <value>Received spectrum</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>baseband_freq</key> <value>0</value> </param> <param> <key>y_per_div</key> <value>10</value> </param> <param> <key>y_divs</key> <value>10</value> </param> <param> <key>ref_level</key> <value>10</value> </param> <param> <key>ref_scale</key> <value>2.0</value> </param> <param> <key>fft_size</key> <value>1024</value> </param> <param> <key>fft_rate</key> <value>30</value> </param> <param> <key>peak_hold</key> <value>False</value> </param> <param> <key>average</key> <value>False</value> </param> <param> <key>avg_alpha</key> <value>0</value> </param> <param> <key>win</key> <value>None</value> </param> <param> <key>win_size</key> <value></value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>notebook</key> <value>notebook_0,1</value> </param> <param> <key>freqvar</key> <value>None</value> </param> <param> <key>_coordinate</key> <value>(1081, 563)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>wxgui_fftsink2</key> <param> <key>id</key> <value>wxgui_fftsink2_0_0</value> </param> <param> <key>_enabled</key> <value>True</value> </param> <param> <key>type</key> <value>complex</value> </param> <param> <key>title</key> <value>Post-sync spectrum</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>baseband_freq</key> <value>0</value> </param> <param> <key>y_per_div</key> <value>10</value> </param> <param> <key>y_divs</key> <value>10</value> </param> <param> <key>ref_level</key> 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<key>title</key> <value>Post-sync Signal</value> </param> <param> <key>samp_rate</key> <value>samp_rate</value> </param> <param> <key>v_scale</key> <value>0</value> </param> <param> <key>v_offset</key> <value>0</value> </param> <param> <key>t_scale</key> <value>0</value> </param> <param> <key>ac_couple</key> <value>False</value> </param> <param> <key>xy_mode</key> <value>True</value> </param> <param> <key>num_inputs</key> <value>1</value> </param> <param> <key>win_size</key> <value></value> </param> <param> <key>grid_pos</key> <value></value> </param> <param> <key>notebook</key> <value>notebook_0,0</value> </param> <param> <key>trig_mode</key> <value>gr.gr_TRIG_MODE_AUTO</value> </param> <param> <key>y_axis_label</key> <value>Counts</value> </param> <param> <key>_coordinate</key> <value>(1085, 213)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <block> <key>variable_slider</key> <param> <key>id</key> <value>freq_bw</value> </param> <param> 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<value>(6, 284)</value> </param> <param> <key>_rotation</key> <value>0</value> </param> </block> <connection> <source_block_id>gr_channel_model_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_fll_band_edge_cc_0</source_block_id> <sink_block_id>gr_pfb_clock_sync_xxx_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>gr_pfb_clock_sync_xxx_0</source_block_id> <sink_block_id>digital_costas_loop_cc_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>digital_costas_loop_cc_0</source_block_id> <sink_block_id>wxgui_scopesink2_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>blks2_pfb_arb_resampler_ccf_0</source_block_id> <sink_block_id>gr_multiply_const_vxx_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>gr_chunks_to_symbols_xx</source_block_id> <sink_block_id>blks2_pfb_arb_resampler_ccf_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>gr_channel_model_0</source_block_id> <sink_block_id>digital_fll_band_edge_cc_0</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> <connection> <source_block_id>digital_fll_band_edge_cc_0</source_block_id> <sink_block_id>wxgui_fftsink2_0_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>wxgui_fftsink2_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>wxgui_scopesink2_0_0_1</sink_block_id> <source_key>0</source_key> <sink_key>0</sink_key> </connection> 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