Joint Maximum Likelihood Estimation of Carrier and Sampling Frequency Offsets for OFDM Systems

被引：50
|
作者：
Kim, Yong-Hwa [1 ]
Lee, Jong-Ho [2 ]
机构：
[1] Korea Electrotechnol Res Inst KERI, Ansan 426170, South Korea
[2] Kongju Natl Univ, Cheonan 331717, South Korea
来源：
IEEE TRANSACTIONS ON BROADCASTING | 2011年 / 57卷 / 02期
关键词：
Carrier frequency offset; Cramer-Rao bound; orthogonal frequency-division multiplexing (OFDM); sampling frequency offset; OPTIMUM RECEIVER DESIGN; INTERCARRIER; TRACKING;
D O I：
10.1109/TBC.2011.2122890
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 orthogonal frequency-division multiplexing (OFDM) systems, carrier and sampling frequency offsets (CFO and SFO, respectively) can destroy the orthogonality of the sub-carriers and degrade the system performance. In this paper, we propose a new joint CFO and SFO maximum-likelihood (ML) estimation scheme extending Moose's CFO estimation scheme using two long training symbols in the frequency-domain (FD). In particular, we derive FD Cramer-Rao bounds (CRBs) for the mean square errors (MSEs) of the CFO and SFO estimation. Simulation results show that the proposed ML scheme exhibits better performance than the other existing methods.
引用
收藏
页码：277 / 283
页数：7
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