Research On Space-Time Coding And Frequency-Domain Equalization Technique Of The MIMO System

Research on Space-Time Coding and Frequency-Domain Equalization Technique of the MIMO SystemM.S.Candidate: YANG Bing, Supervisor: YANG Luxi Department of Radio Engineering, Southeast University, ChinaMIMO techniques are the key schemes for achieving high data rate and performance in 3G mobile communications and beyond. In this dissertation, we mainly focus on the topics of transmitting diversity, space-time coding and frequency domain equalization. The main contents of this dissertation are expressed as follows:Firstly, the present models of Rayleigh fading channels are researched. Based on these models, a method of the generation of MIMO frequency selective fading channels is proposed. This work gives convenience for computer simulations.Secondly, Alamouti's transmit diversity algorithm is applied to the case with more than two transmitting antennas, and a high rate space-time coding and its decoding for Rayleigh flat-fading channels is presented. Thirdly, the space-time block coding for frequency selective channels with two transmitting antennas is studied, while the general block coding methods for frequency selective channels are proposed. And the coding and decoding methods for four transmitting antennas are detailed.Afterwards, an improved space-time block coding and its frequency-domain decoding algorithm over frequency-selective fading MIMO channels are proposed. The coding algorithm and frequency domain equalization with four transmitting antennas and two receiving antennas is detailed.At last, a dual-model communication system co-existed single carrier frequency domain equalization (SC FDE) and orthogonal frequency division multiplexing (OFDM) is afforded.