A NLMS Algorithm for Frequency Offset Estimation of OFDM Communications

Ann-Chen CHANG  Zhi-Feng HUANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.9   pp.2823-2827
Publication Date: 2003/09/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
Keyword: 
orthogonal frequency division multiplexing (OFDM),  carrier frequency offset,  time varying tracking,  NLMS algorithm,  

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Summary: 
In this letter, we present a normalized least-mean-square algorithm of blind estimator for carrier frequency offset estimation of orthogonal frequency division multiplexing systems. In conjunction with the closed-loop estimate structure, the proposed efficient algorithm eliminates the inter-carrier interference for time varying carrier frequency offset. The proposed algorithm offers faster convergence speed and more accuracy to the carrier frequency offset estimate. Several computer simulation examples are presented for illustrating and effectiveness of the proposed algorithm.