Multi-input multi-output wireless systems with maximum diversity and spatial multiplexing

In this dissertation we show that BICM-OFDM systems can achieve the maximum frequency diversity regardless of the power delay profile (PDP) of the frequency selective channel. That is for L-tap frequency selective channels, BICM-OFDM is shown to achieve a diversity order of min( dfree, L), where dfree is the minimum Hamming distance of the convolutional code used for BICM.; Space-time block codes (STBC) are known to achieve full spatial diversity over Rayleigh fading channels. We introduce a system as a combination of STBC and BICM-OFDM, hence named BICM-STBC-OFDM. We show that BICM-STBC-OFDM achieves full spatial and frequency diversity order of NML with N transmit and M receive antennas over L-tap frequency channel with any type of PDP.; Naturally, if channel state information at the transmitter (CSIT) and at the receiver (CSIR) are available, then the transmission can be adapted depending on the channel realization by using signal processing techniques. In general, joint linear processing at the transmitter and the receiver with the help of CSIT and CSIR is known as beamforming. Singular value decomposition (SVD) based beamforming separates the MIMO channel into parallel subchannels. If only one symbol is transmitted over multiple transmit antennas, then the technique is known as single beamforming. If multiple number of symbols are transmitted, then it is called multiple beamforming. In this dissertation, we investigate uncoded, uniform power beamforming. We show that single beamforming achieves full spatial diversity and provides a significant coding gain when compared to STBC. We also analyze single beamforming with BICM-OFDM, named BBO. Our analysis shows that BBO achieves full diversity in space and frequency, and introduce a significant coding gain when compared to STBC-based systems. Simulation results also show that the performance improvement is significant even with partial CSIT.; Another important problem in wireless communications is to achieve high data rates while keeping a high diversity order.; In order to maintain the full diversity while transmitting multiple streams of data, we introduce bit interleaved coded multiple beamforming (BICMB). We show that by using certain design criteria, BICMB and BICMB-OFDM can achieve full diversity order available in the channel regardless of the number of streams transmitted. (Abstract shortened by UMI.)...