Soft Decision Metrics for Differentially Encoded QPSK
Andreas Bisplinghoff, Christian Cabirol, Stefan Langenbach, Wolfgang Sauer-Greff, Bernhard Schmauß · 2011
We investigate phase slip aware soft decision metrics for coherently demodulated differentially encoded QPSK. A low-complexity approximation of a suitable metric has negligible penalty with practical soft decoders and is robust against residual phase noise.