Concatenation of Space-Time block codes and Turbo Trellis Coded Modulation (ST-TTCM) over Rician fading channels with imperfect phase

In this paper, the performance of Space Time-Turbo Trellis Coded Modulation (ST-TTCM) is evaluated over Rician and Rayleigh fading channels with imperfect phase. We use Baum-Welch (BW) algorithm to estimate the fading and phase jitter parameters. Thus we assume that the channel parameters change slower than carrier frequency. We know that at high data rate transmissions over wireless fading channels, Space-Time Block Codes provide the maximal possible diversity advantage. Here, the combined effects of the amplitude and the phase of the received signal are considered, each one modeled by Rician and Tikhonov distributions respectively. We investigate Space Time-Turbo Trellis Coded Modulation (ST-TTCM) for 8-PSK for several Rician factor K and phase distortion factor /spl eta/. Thus, our results reflect the degradations both due to the effects of the fading on the amplitude and phase noise of the received signal while the channel parameters are estimated by BW algorithm.