Performance Evaluation of Multi-Stage Receivers for coded signals in MIMO channels

The abstract can be given as below:

Wireless Communication is one of the most vibrant areas in the communication field today. The past decade has seen a surge of research activities in the area, especially in designing faster, more reliable and power efficient wireless communication system. As a novel technology, multi-antenna communication especially MIMO system has gained lot of interest and has been considered as a key technology for Broadband 3G communication. By exploiting the spatial diversity using multiple antennas one can improve reliability, increase throughput and reduce transmission power. The performance on the uplink degrades as the interference swells. The main objective of this thesis is to propound interference cancellation technique called Multi-User Detection (MUD) to mitigate the effects of Multiple Access Interference (MAI), which limits the capacity of the system. The performance of various Multi-User receivers for VBLAST and STBC are studied and analyzed. Also the performance comparison of sub-optimal detectors such as Zero Forcing (ZF), Minimum Mean Square Error (MMSE), QR Factorization, Nulling and Cancellation Detector, Zero Forcing/Maximum A Posteriori (ZF/MAP) and optimal detectors like Maximum Likelihood (ML) are assayed through simulation. It is discerned that MUD provides remarkable amelioration in terms of mitigating MAI for coded signals on MIMO channels.