Soft-Decision Decoding for Trellis Coding and Phase-Difference Modulation

摘要

A simple method is presented for performing soft-decision demodulation anddecoding of trellis-coded phase-difference modulations. Results are given for trellis-coded M-ary differential phase-shift keying and M-ary double-differential phase-shift keying, each with soft-decision demodulation and decoding. The performances of these combinations of coding, modulation, demodulation, and decoding are presented for channels which may introduce a phase ramp in the modulated signal.