Comments and Further Results on `Performance Evaluation of a New BPSK-OFDM Timing Estimation Algorithm'

Authors:
Jingyu Hua;Liming Meng;Zhijiang Xu;Xiaojian Xu
Affiliations:
College of Information Engineering, Zhejiang University of Technology, Hangzhou, China 310032;College of Information Engineering, Zhejiang University of Technology, Hangzhou, China 310032;College of Information Engineering, Zhejiang University of Technology, Hangzhou, China 310032;Institute of Information Engineering, Information Engineering University, Zhengzhou, China
Venue:
Wireless Personal Communications: An International Journal
Year:
2009

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Performance evaluation of a new BPSK-OFDM timing estimation algorithm

Wireless Personal Communications: An International Journal
ML estimation of time and frequency offset in OFDM systems

IEEE Transactions on Signal Processing

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Abstract

This comment first points out some inaccurate formulae and irrelevant comparisons between Wen's algorithm and Beek's one. Then, the correct formulae are provided, the limitations of these two estimators are discussed and some investigations on the local maximum in timing estimation are also presented. Both the simulation and the analysis demonstrate that the timing precision of Wen's algorithm highly depends on the length of cyclic prefix (CP) and the channel fading rate. On the other hand, Beek's algorithm will work better under a large CP length and in fast fading channels.