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Indexed by:期刊论文

Date of Publication:2008-06-01

Journal:IEEE COMMUNICATIONS LETTERS

Included Journals:SCIE、EI

Volume:12

Issue:6

Page Number:453-455

ISSN No.:1089-7798

Key Words:H-infinity filtering; inter-carrier interference (ICI); frequency offset; orthogonal frequency division multiplexing (OFDM)

Abstract:In this paper, an extended H. filter-based carrier frequency offset (CFO) estimator is proposed for orthogonal frequency division multiplexing (OFDM) systems. The design criterion of the proposed estimator is to minimize the effect of worst-case disturbances (noise and model error) on the CFO estimation errors. This data-aided CFO estimator does not require any statistical knowledge of the disturbances. Moreover, its computational complexity is similar to that of the extended Kalman filter (EKF) method. Simulation results show that the proposed method can combat ICI effectively and obtain better bit error rate (BER) performance in the unknown noise for OFDM systems.