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DIGTRX fast encoder modpm.exe

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  • cesco12342000
    download at http://www.qsl.net/hb9tlk/modpm.zip and replace modpm.exe in the digtrx directory. the file has slightly changed phase angles to improve
    Message 1 of 1 , May 9, 2004
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      download at
      http://www.qsl.net/hb9tlk/modpm.zip

      and replace modpm.exe in the digtrx directory.

      the file has slightly changed phase angles
      to improve distinction between -4 and +4
      phase changes. (aequidistant)

      original phase angles:
      //0 -2.957817 1 -2.218363 2 -1.478908 3 -0.739454
      //4 0.0
      //5 0.739454 6 1.478908 7 2.218363 8 2.957817
      changed phase angles:
      //0 -2.792526 1 -2.094395 2 -1.396263 3 -0.698131
      //4 0.0
      //5 0.698131 6 1.396263 7 2.094395 8 2.792526

      the modulation is done by an I/Q modulator with shaped
      transitions. the filtering of the modulated carriers is
      not necessary.

      any comments welcome ...
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