GNU Radio es un programa de procesamiento de señales, que se distribuye bajo los términos de la Licencia Pública General de GNU. El objetivo es darle a la gente de software la capacidad de ‘hackear’ el espectro electromagnético, es decir, para entender el espectro radioeléctrico y pensar en maneras inteligentes de usar.

Podría ser el programa software libre para remplazar a LabVIEW

estoy recien aprendiendo a usar este programa pero, les dejo una simulación de AM que he echo.

La señal es : 7 sin(2*pi*1000*t )

La señal Carrier es de : 10 sin(2*pi*10000*t)

la modulada AM= (10 * 7sin(2*pi*1000*t)) * sin (2*pi*10000*t)

 

les dejo el GRC : —>Descargar

<?xml version='1.0' encoding='ASCII'?>
<flow_graph>
  <timestamp>Wed May  9 22:42:08 2012</timestamp>
  <block>
    <key>options</key>
    <param>
      <key>id</key>
      <value>top_block</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>title</key>
      <value></value>
    </param>
    <param>
      <key>author</key>
      <value></value>
    </param>
    <param>
      <key>description</key>
      <value></value>
    </param>
    <param>
      <key>window_size</key>
      <value>1280, 1024</value>
    </param>
    <param>
      <key>generate_options</key>
      <value>wx_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>realtime_scheduling</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(124, 156)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>const_source_x</key>
    <param>
      <key>id</key>
      <value>const_source_x_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>const</key>
      <value>10</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(385, 44)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_noise_source_x</key>
    <param>
      <key>id</key>
      <value>gr_noise_source_x_1<
/value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>noise_type</key>
      <value>gr.GR_GAUSSIAN</value>
    </param>
    <param>
      <key>amp</key>
      <value>1</value>
    </param>
    <param>
      <key>seed</key>
      <value>42</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(404, 477)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_add_xx</key>
    <param>
      <key>id</key>
      <value>gr_add_xx_1</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>num_inputs</key>
      <value>2</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(619, 102)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_multiply_xx</key>
    <param>
      <key>id</key>
      <value>gr_multiply_xx_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>num_inputs</key>
      <value>2</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(739, 310)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_add_xx</key>
    <param>
      <key>id</key>
      <value>gr_add_xx_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>num_inputs</key>
      <value>2</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(902, 463)</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>float</value>
    </param>
    <param>
      <key>title</key>
      <value>FFT Plot</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>50</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></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1001, 9)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_throttle</key>
    <param>
      <key>id</key>
      <value>gr_throttle_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>samples_per_second</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>vlen</key>
      <value>1</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(1074, 476)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_sig_source_x</key>
    <param>
      <key>id</key>
      <value>gr_sig_source_x_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>samp_rate</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>waveform</key>
      <value>gr.GR_SIN_WAVE</value>
    </param>
    <
param>
      <key>freq</key>
      <value>1000</value>
    </param>
    <param>
      <key>amp</key>
      <value>7</value>
    </param>
    <param>
      <key>offset</key>
      <value>0</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(389, 152)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <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>32000</value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(103, 281)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>variable_slider</key>
    <param>
      <key>id</key>
      <value>variable_slider_0</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>label</key>
      <value></value>
    </param>
    <param>
      <key>value</key>
      <value>50</value>
    </param>
    <param>
      <key>min</key>
      <value>0</value>
    </param>
    <param>
      <key>max</key>
      <value>100</value>
    </param>
    <param>
      <key>num_steps</key>
      <value>100</value>
    </param>
    <param>
      <key>style</key>
      <value>wx.SL_HORIZONTAL</value>
    </param>
    <param>
      <key>converver</key>
      <value>float_converter</value>
    </param>
    <param>
      <key>grid_pos</key>
      <value></value>
    </param>
    <param>
      <key>notebook</key>
      <value></value>
    </param>
    <param>
      <key>_coordinate</key>
      <value>(99, 385)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <block>
    <key>gr_sig_source_x</key>
    <param>
      <key>id</key>
      <value>gr_sig_source_x_2</value>
    </param>
    <param>
      <key>_enabled</key>
      <value>True</value>
    </param>
    <param>
      <key>type</key>
      <value>float</value>
    </param>
    <param>
      <key>samp_rate</key>
      <value>samp_rate</value>
    </param>
    <param>
      <key>waveform</key>
      <value>gr.GR_SIN_WAVE</value>
    </param>
    <param>
      <key>freq</key>
      <value>10000</value>
    </param>
    <param>
      <key>amp</key>
      <value>100</value>
    </param>
    <param>
      <key>offset</key>
      <value>0</value>
   
 </param>
    <param>
      <key>_coordinate</key>
      <value>(393, 308)</value>
    </param>
    <param>
      <key>_rotation</key>
      <value>0</value>
    </param>
  </block>
  <connection>
    <source_block_id>gr_throttle_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>const_source_x_0</source_block_id>
    <sink_block_id>gr_add_xx_1</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>gr_sig_source_x_0</source_block_id>
    <sink_block_id>gr_add_xx_1</sink_block_id>
    <source_key>0</source_key>
    <sink_key>1</sink_key>
  </connection>
  <connection>
    <source_block_id>gr_sig_source_x_2</source_block_id>
    <sink_block_id>gr_multiply_xx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>1</sink_key>
  </connection>
  <connection>
    <source_block_id>gr_add_xx_1</source_block_id>
    <sink_block_id>gr_multiply_xx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>gr_noise_source_x_1</source_block_id>
    <sink_block_id>gr_add_xx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>1</sink_key>
  </connection>
  <connection>
    <source_block_id>gr_multiply_xx_0</source_block_id>
    <sink_block_id>gr_add_xx_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
  <connection>
    <source_block_id>gr_add_xx_0</source_block_id>
    <sink_block_id>gr_throttle_0</sink_block_id>
    <source_key>0</source_key>
    <sink_key>0</sink_key>
  </connection>
</flow_graph>

Saludos