Hi! I found a comment in the source code of the MPSK block, that it could be used for oQPSK demodulation. I think this block is very interesting implementation, however I'm not sure which parameters I should use for oQPSK. In the gr-ieee802_15_4 implementation from Thomas Schmid he uses a Quadrature Demod with an MM Clock Recovery where the parameters are:
omega = self.sps gain_mu=0.03 mu=0.5 omega_relative_limit=0.0002 gain_omega = .25*gain_mu*gain_mu # critically damped This works just fine - with a Quadrature Demodulator. Can somebody suggest parameters for the MPSK Block, or give me some hints how I can calculate/test them at least? The MPSK block uses a Costas Loop for Demodulation, so the approach is quite different here. Also I wonder whether it's possible to use a 4QAM Demod, because practically a 4QAM mod produces the same wave-form like a QPSK. Practically at least ,) Best, Marius _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
