利用时域相关的MIMO-OFDM信道估计算法  

Channel Estimation Algorithm Utilizing Correlation in Time-Domain for MIMO-OFDM Systems

作　　者：周明宇[1,2] 李立华[1,2] 张平[1,2] 王海峰 王锐[1,2] 姜军[1,2] 陶小峰[1,2] 

机构地区：[1]泛网无线通信教育部重点实验室(北京邮电大学),北京100876 [2]北京邮电大学无线新技术研究所,北京100876 [3]诺基亚技术平台,上海200002

出　　处：《系统仿真学报》2008年第23期6343-6346,6352,共5页Journal of System Simulation

基　　金：国家自然科学基金项目(60702051);国家"863计划"项目(2007AA01Z261;2006AA01Z260);高等学校博士学科点专项科研基金资助课题(20070013028);诺基亚公司合作项目;北京邮电大学研究生创新项目

摘　　要：提出了一种适用于多入多出正交频分复用(MIMO-OFDM)系统的信道估计算法,详细说明了导频符号的特殊设计算法以及信道估计算法的原理,并对该算法的均方误差性能以及复杂度进行分析;该算法能够在信道多径时延信息准确已知或不准确时带来良好的估计精度,从而保证系统性能。将该算法应用于超三代-时分双工(B3G-TDD)系统中并在室外和室内环境下仿真,均方误差和系统误码率性能结果说明了该算法的有效性;该算法能够大大增强系统的鲁棒性。A channel estimation algorithm was proposed for multiple input multiple output-orthogonal frequency division multiplexing （MIMO-OFDM） systems. The special design for pilot symbols and theory for the channel estimation algorithm were given in great detail, and the mean-square-error （MSE） performance and complexity of the algorithm were analyzed. The algorithm could bring excellent estimation precision when information of channel multi-path delay was known exactly or inaccurately, and it could guarantee system performance. The algorithm was applied in beyond 3G-time division duplex （B3G-TDD） system and simulation was carried out under both indoor and outdoor environments. The results of MSE and bit error rate performance show the effect of the algorithm. This algorithm can improve system robustness greatly.

关 键 词：多入多出 正交频分复用 信道估计 导频设计 时域冲激响应 

分 类 号：TN911.22[电子电信—通信与信息系统]