Re: [Discuss-gnuradio] Differential QPSK modulation resampling

[irene159]

Hello,

Just another question concerning the file "gr_mpsk_receiver_cc.cc". 

In the extract of code below, why are phase_error_detector_generic and
decision_generic  used for all BPSK, QPSK and other modulations?
Have optimized algorithms for BPSK and QPSK already been implemented?

// Select a phase detector and a decision maker for the modulation order
  switch(d_M) {
  case 2:  // optimized algorithms for BPSK
    d_phase_error_detector =
&gr_mpsk_receiver_cc::phase_error_detector_generic; //bpsk;
    d_decision = &gr_mpsk_receiver_cc::decision_generic; //bpsk;
    break;

  case 4: // optimized algorithms for QPSK
    d_phase_error_detector =
&gr_mpsk_receiver_cc::phase_error_detector_generic; //qpsk;
    d_decision = &gr_mpsk_receiver_cc::decision_generic; //qpsk;
    break;

  default: // generic algorithms for any M (power of 2?) but not pretty
    d_phase_error_detector =
&gr_mpsk_receiver_cc::phase_error_detector_generic;
    d_decision = &gr_mpsk_receiver_cc::decision_generic;
    break;
  }


Regards,
Irene

-- 
View this message in context: 
http://www.nabble.com/Differential-QPSK-modulation-resampling-tp17276806p17314530.html
Sent from the GnuRadio mailing list archive at Nabble.com.