A Novel Carrier Frequency Offset Estimation for OFDM Systems Over Time-Varying Multipath Channels

Authors:
Qi Jiang;Joachim Speidel;Chunming Zhao
Affiliations:
National Mobile Communications Research Laboratory, Southeast University, Nanjing, China and Institute of Telecommunications, University Stuttgart, Stuttgart, Germany;Institute of Telecommunications, University Stuttgart, Stuttgart, Germany;National Mobile Communications Research Laboratory, Southeast University, Nanjing, China
Venue:
Wireless Personal Communications: An International Journal
Year:
2009

Citing 3
Cited 1

Joint estimation of symbol timing and carrier frequency offset of OFDM signals over fast time-varying multipath channels

IEEE Transactions on Signal Processing
ML estimation of time and frequency offset in OFDM systems

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Optimal training for block transmissions over doubly selective wireless fading channels

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Joint Carrier Frequency Offset and Channel Estimation for Amplify-and-Forward Cooperative OFDM System

Wireless Personal Communications: An International Journal

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Abstract

This paper introduces a novel method to estimate fractional carrier frequency offset (CFO) under time-varying multipath channels in OFDM systems based on the approximation of Basis Expansion Model (BEM). Due to the symmetrical character of the BEM basis, we propose a new design of training sequence with trailing zeros. This training sequence can be used at the receiver to estimate the frequency offset without channel estimation only in one OFDM symbol. We also compare our method with Beek's ML estimator and Lv's fine synchronization estimator. The numerical results demonstrate that the proposed method provides an improved performance when the training sequence has a short length.