Carrier Frequency Offset Estimation for OFDM Systems by Histogram

Ju-Ya CHEN  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.10   pp.2766-2768
Publication Date: 2010/10/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2766
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
OFDM,  carrier frequency offset,  estimation,  histogram,  

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Carrier frequency offset may distort the orthogonality of the subcarriers in OFDM systems and it must be estimated and compensated to maintain the system performance. A blind carrier frequency offset estimator based on the histogram of the received signal's phase is proposed in this letter. The proposed estimator can operate under additive white Gaussian noise and multipath channels without known training signal, redundant guard interval, and virtual carrier. Compared to subspace-based blind estimators, the proposed estimator can provide better mean-square-error performance.