EM-based iterative receiver design with carrier-frequency offset estimation for MIMO OFDM systems

被引：53
|
作者：
Sun, Y [1 ]
Xiong, ZX
Wang, XD
机构：
[1] Texas A&M Univ, Dept Elect Engn, College Stn, TX 77843 USA
[2] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA
来源：
IEEE TRANSACTIONS ON COMMUNICATIONS | 2005年 / 53卷 / 04期
关键词：
carrier-frequency offset (CFO); expectation-maximization (EM) algorithm; multiple-input multiple-output (MIMO); orthogonal frequency-division multiplexing (OFDM);
D O I：
10.1109/TCOMM.2005.844920
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this letter, we study the design of expectation-maximization (EM)-based iterative receivers for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing systems with the presence of carrier-frequency offset (CFO). Motivated by the spirit of maximum-likelihood estimation in the EM algorithm, we first present a pilot-aided CFO estimation scheme that allows fast Fourier transform-based fast implementation. Then this CFO estimation is incorporated into the initialization step of the iterative receiver. Experimental results show the effectiveness of our receiver design in combating CFO.
引用
收藏
页码：581 / 586
页数：6
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