An efficient coarse frequency offset estimator for OFDM

被引：0
|
作者：
Wu, Yun [1 ]
Luo, Hanwen [1 ]
Ding, Ming [1 ]
Liu, Renmao [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Elect Engn, Shanghai 200030, Peoples R China
[2] Shanghai Sharp Elect Co, Sharp Adv R&D Ctr, Shanghai, Peoples R China
来源：
2006 INTERNATIONAL CONFERENCE ON COMMUNICATIONS, CIRCUITS AND SYSTEMS PROCEEDINGS, VOLS 1-4: VOL 1: SIGNAL PROCESSING | 2006年
关键词：
D O I：
10.1109/ICCCAS.2006.284828
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
A novel scheme of integer frequency offset (IFO) estimation for OFDM systems is proposed based on an OFDM training symbol with several identical parts. In this scheme, the received OFDM training symbol is first reshaped into several sub-symbols by selecting the samples with the same index in each part. It shows that the reshaping process introduces time diversity. The IFO is estimated by finding the maximum magnitude of the frequency domain signals obtained by taking a modified FFT algorithm on some sub-symbols. To efficiently use the multiple sub-symbols, an adaptive time diversity combining method based on estimate reliability decision is presented. Simulation results show that the proposed IFO estimate scheme has an improved estimate performance compared to conventional estimate scheme while maintaining a lower complexity.
引用
收藏
页码：1049 / +
页数：2
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