Performance of MIMO Techniques to Achieve Full Diversity and Maximum Spatial Multiplexing

In this paper, we analyze the performance of bit interleaved coded multiple beamforming (BICMB). We provide interleaver design criteria such that the resulting system achieves full spatial multiplexing of min(N, M) and full spatial diversity of NM for a system with N transmit and M receive antennas. We combined BICMB with OFDM in order to combat ISI caused by the frequency selective channels. The resulting system, named as BICMB-OFDM, achieves full spatial multiplexing of min(N, M), while maintaining full spatial and frequency diversity of NML for a N×M system over L-tap frequency selective channels when an appropriate convolutional code is used. Both systems analyzed in this paper assume perfect channel state information at the transmitter. Simulation results show that BICMB, and BICMBOFDM provide substantial performance gains when compared to the other spatial multiplexing systems.