High effective MAP algorithm for MIMO-OFDM systems

摘要：

For MIMO-OFDM systems,maximum a posteriori probability(MAP)channel estimation algorithm induces large matrix inversion and product operation when it is applied to multiple-input multiple-output with orthogonal frequency division multiplexing(MIMO-OFDM) systems.And the data transmission efficiency will be reduced with the increasing number of transmit antennas.According to these problems,a high effective MAP algorithm for MIMO-OFDM is proposed. This algorithm which uses the characteristic of Expectation maximum (EM) algorithm decrease high complexity. To improve the data transmission efficiency and the performance of channel estimation,joint estimation is carried out over multiple OFDM symbols.Besides, depending on the spatial independence of MIMO channel in angle domain, the dimension-reduced MAP algorithm will be enhanced. Simulation results indicate the proposed algorithm obtains better the performance of estimation and higher data transmission efficiency.

关键词： ofdm channel estimation era map angle domain

作者: Peng Xu Jinkuan Wang Feng Qi

作者单位: School of Information Science & Engineering University of Northeastern University Shenyang,Liaoning ESAT-TELEMIC University of Leuven B-3001, Belgium

会议类型: 国际会议

会议名称: 2009 Second International Conference on Intelligent Computation Technology and Automation(2009 第二届IEEE智能计算与自动化国际会议 ICICTA 2009)

会议地点: 长沙

会议语种:英文

页码: 275-278

在线出版日期: 2009-10-10（万方平台首次上网日期，不代表论文的发表时间）