An Efficient Frequency Offset Estimation Method With a Large Range for Wireless OFDM Systems

• Published in: IEEE transactions on vehicular technology Vol. 56; no. 4; pp. 1892 - 1895
• Main Authors: Guangliang Ren, Guangliang Ren, Yilin Chang, Yilin Chang, Huining Zhang, Huining Zhang, Hui Zhang, Hui Zhang
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Bandwidth; Detection, estimation, filtering, equalization, prediction; Doppler shift; Envelop equalized processing (EEP); Estimates; Exact sciences and technology; Fading; Frequency division multiplexing; Frequency estimation; frequency offset estimation; Frequency synchronization; Information, signal and communications theory; Intersymbol interference; Multiplexing; OFDM; Offsets; Orthogonal Frequency Division Multiplexing; orthogonal frequency-division multiplexing (OFDM); Robustness; Signal and communications theory; Signal, noise; Symbols; synchronization; Telecommunications and information theory; Training; Wireless communication; Performance evaluation; Parameter estimation; Wireless telecommunication; Signal estimation; Frequency estimation; Synchronization; Learning; Orthogonal frequency division multiplexing; Envelop equalized processing (EEP); Distance measurement; Frequency offset; frequency offset estimation; orthogonal frequency-division multiplexing (OFDM)
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/TVT.2006.878560

An efficient frequency offset estimation method is proposed for wireless orthogonal frequency-division multiplexing (OFDM) systems. In the proposed method, the received samples of the training symbol are processed by a novel envelop equalized processing method, and the estimation of the frequency offset in the OFDM systems turns out to be the frequency estimation of a complex tone. A novel frequency estimation method is employed to estimate the frequency offset. The estimation range of the proposed method is as large as the bandwidth of the OFDM signal, and the performance of the proposed method is independent of the structure of the training symbol.