ERROR PERFORMANCE ANALYSIS OF QUADRATURE PARTIAL-RESPONSE TRELLIS-CODED MODULATION (QPR-TCM) IN FADING MOBILE SATELLITE CHANNELS

In this paper, to improve bandwidth efficiency and error performance, partial response signaling (PRS) and trellis coded modulation (TCM) ar e combined together and named as QPR-TCM. Whereas previous contributio ns have considered the performance of TCM transmitted over an additive white Gaussian noise (AWGN) channel, the emphasis in this paper is on tile performance of trellis coded MQAM combined with PRS in the fadin g environment. We shall only consider the case where interleaving/dein terleaving is employed to further combat the fading and assume that th e ideal channel state information (CSI) is available. Analytical upper bounds are derived using the well known transfer function bounding te chnique, the bandwidth efficiencies are computed and the numerical res ults for several practical schemes are compared to each other. One int eresting result is that when the combined system is used on a Rician f ading channel, the bit error probability upper bounds of the proposed 6QPR-TCM and 9QPR-TCM systems are better than their counterparts the 4 QAM-TCM systems with 2 and 4 states, respectively, for SNR, values gre ater than a threshold, which have the best error performances in the l iterature.