Research On MIMO System Capacity And Signal Detection

Jt is believed that the wireless MIMO technology will be one of the key ones that realize the high-speed broadband wireless Internet access networks in the future and has wide application prospect in the third generation (3G) or beyond third generation (B3G) mobile communications. It has mainly made further research on the related theories about four main aspects: channel models, channel capacity, channel estimation and signal detection algorithms in the thesis. Moreover, a number of useful experimental results were obtained by a number of computer-aided simulations. The main contents of the dissertation are expressed as follows:In the first chapter, it is an introduction of the background and significance of the research in the dissertation, and the simple overview of the progress made in research and application of wireless MIMO technology at present.In the second chapter, it analyses the wireless channel, and expounds the MIMO channel characteristic, and then models the MIMO channel.In the third chapter, it was particularly analyzed the impact of the correlation between antenna arrays both sides of transmit and receive, and known and unknown channel state information on the capacity of MIMO channel. The related simulation results are also given. It was specifically analyzed the capacity for two kind of special MIMO channel (full "1" channel and orthogonal channel). The formulae for computing the capacity of the two channels were obtained.In the fourth chapter, it introduces vertically layered space-time architectures and detection techniques. Under flat fading MIMO channel there are two kinds of detection techniques: optimal and suboptimal. Although maximum-likelihood decoding is the optimal detecting algorithm, its extremely high complexity excludes its application to...