Abstract
Rate-(n − 1)/n phase-invariant trellis coding with unquantised maximum-likelihood Viterbi decoding for differentially-encoded coherent M-ary (M = 2n) PSK signals on Rayleigh fading channels is considered. The simulated bit error probability performance of the trellis-coded modulation is presented for four- and eight-state linear and nonlinear codes of constraint lengths 3 and 4, respectively, with coding gains of at least 2.5 dB at a bit error rate of 10−3.
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