Detection of trellis-coded modulation on frequency-non-selective Rayleigh fading channel

Abstract

We look into a new strategy for detecting signals with trellis-coded modulation transmitted over a frequency-non-selective fading channel. For both interleaved and non-interleaved systems, the Viterbi algorithm is used to minimize an additive metric which incorporates estimates of the fading samples in each symbol interval. Kalman estimators are used to recursively update these estimates on a per-survivor basis whereupon, at a given instant, a distinct estimate is associated to each trellis node. Bit error rate curves are evaluated by computer simulations and compared to curves obtained assuming ideal fading knowledge and to curves pertaining to other methods in the literature.