A High-Resolution Frequency-Offset Estimator for OFDM-Based WLAN Systems

Sekchin CHANG

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B    No.12    pp.4655-4658
Publication Date: 2005/12/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.12.4655
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
frequency-offset,  estimation,  OFDM,  WLAN,  

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Summary: 
Orthogonal frequency division multiplexing (OFDM) has been adopted in the physical layer of IEEE802.11a WLAN standard. In this Letter, a high-resolution frequency-offset estimation scheme is presented for the OFDM-based WLAN. The scheme efficiently exploits the features of the 802.11a preamble for high-resolution estimation of frequency-offset. Simulation results indicate that the algorithm is much superior to the conventional scheme for frequency-offset estimation in the 802.11a WLAN.