Carrier frequency synchronization and tracking for OFDM systems with receive antenna diversity

被引：10
|
作者：
Zhang, Jie [1 ]
Lau, Vincent K. N. [1 ]
机构：
[1] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Kowloon, Hong Kong, Peoples R China
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2007年 / 6卷 / 09期
关键词：
orthogonal frequency-division multiplexing(OFDM); receive diversity; carrier frequency synchronization; maximum likelihood estimation; Cramer-Rao bound (CRB);
D O I：
10.1109/TWC.2007.06043
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：
Blind carrier frequency synchronization for orthogonal frequency division multiplexing (OFDM) systems with receive diversity is proposed in this paper. This method utilizes the fact that different receive branches contain uncorrelated observations about the same information bits. Due to receive diversity, our synchronizer can,perform well without virtual subcarriers when channel state information (CSI) is known. In addition, we shall analyze the effects of CSI errors on the carrier frequency offset (CFO) estimation and show that the proposed algorithm is robust to CSI error. In particular, we derive the Cramer-Rao bound (CRB) from the mean square error (MSE) of the carrier frequency synchronizer. Computer simulation results show the performance improvement of our synchronizer to the single antenna systems and to the existing method.
引用
收藏
页码：3277 / 3286
页数：10
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