Nonlinear Trellis Description for Convolutionally Encoded Transmission Over ISI-channels with Applications for CPM

Inhalt:
In this paper we propose a matched decoding scheme for convolutionally encoded transmission over intersymbol interference (ISI) channels and devise a nonlinear trellis description. As an application we show that for coded continuous phase modulation (CPM) using a non-coherent receiver the number of states of the super-trellis can be significantly reduced by means of a matched non-linear trellis encoder. Index Terms — ISI-channel; continuous phase modulation; convolutionally encoded transmission; matched decoding; noncoherent differential detection; super-trellis decoding