PSK Modulation-Demodulation Compatibility Considerations

Replace instances of modem.pskmod and modem.pskdemod with pskmod and pskdemod.

• This code sample shows you how to simulate multichannel input/output for PSK-modulated signals:

  %% Multi-channel input-output
  M = 16;
  numChan = 1;
  x = randi([0,M-1],16,3);
  phOff = pi/8;
  symorder = 'bin';
  var = 0.2;
  
  %% Using modem object modulate and demodulate
  % Modulate using modem.pskmod modulate the signal
  mpsk = modem.pskmod('M',M,'PhaseOffset',phOff);
  ym1mod = mpsk.modulate(x);
  
  % LLR demodulate using modem.pskdemod
  demodpsk = modem.pskdemod( ...
      'OutputType','Bit','PhaseOffset',phOff, ...
      'DecisionType','LLR','NoiseVariance',0.2);
  ym1demod = demodpsk.demodulate(ym1mod);
  
  % Modulate and demodulate using pskmod and pskdemod functions
  ymod = pskmod(x,M,phOff,symorder);
  ydemod(:,1) = pskdemod(ymod,M,phOff,symorder, ...
      OutputType='integer');
  
  %% Compare modulation and demodulation for System object and modem object
  % Residual modulation error is small
  err1 = (max(abs(ymod(:) - ym1mod(:))))
  % Check to see that demodulated data signal equals the original data
  t_f = isequal(ydemod,x)
  

  err1 =
  
     2.4493e-16
  
  
  t_f =
  
    logical
  
     1