Concatenated Differential Space-Time Block Codes and Four Dimensional 8-PSK Trellis Coded Modulation for Wireless MIMO system with Rayleigh fading Noise

In this paper, new concatenated inner-differential space-time block code (DSTBC) and outer four-dimensional 8PSK trellis coded modulation (4D-8-PSK-TCM) encoder is designed for wireless MIMO system with Rayleigh fading noise in the absence of channel state information (CSI). The proposed concatenated encoder takes advantage of both the high coding gain from its outer-coder and the ease of the detection process from its inner-coder. Simulation results demonstrate the good performance of the proposed scheme (4D-8-PSK-TCM-DSTBC) against the well-known DSTBC scheme for the same spatial diversity and similar signal constellation. The 3 dB performance gap usually involved by symbol by symbol differential detection is also observed between the presented non-coherent detection method and the coherent detection (4D-8-PSK-TCM-STBC) recently published. Keywords— Multidimensional TCM, fading channel, differential space-time block code.