Joint weighted least-squares estimation of carrier-frequency offset and timing offset for OFDM systems over multipath fading channels

Pei Yun Tsai; Hsin Yu Kang; Tzi Dar Chiueh

doi:10.1109/TVT.2004.838891

Joint weighted least-squares estimation of carrier-frequency offset and timing offset for OFDM systems over multipath fading channels

Pei Yun Tsai, Hsin Yu Kang, Tzi Dar Chiueh

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

92 Scopus citations

Abstract

This paper presents an algorithm for joint estimation of carrier-frequency offset and timing offset for orthogonal frequency-division multiplexing (OFDM) systems in the tracking mode. The proposed weighted least-squares algorithm derives its estimates based on phase differences in the received pilot subcarrier signals between two symbols. Moreover, the optimal weights in two different channel conditions are derived. Both analysis and simulation show that the weighted least-squares algorithm can effectively and accurately estimate the carrier-frequency offset as well as the timing offset of OFDM signals in multipath fading channels.

Original language	English
Pages (from-to)	211-223
Number of pages	13
Journal	IEEE Transactions on Vehicular Technology
Volume	54
Issue number	1
DOIs	https://doi.org/10.1109/TVT.2004.838891
State	Published - Jan 2005

Keywords

Carrier-frequency offset
Estimation
Synchronization
Timing offset
Weighted least squares

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10.1109/TVT.2004.838891

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title = "Joint weighted least-squares estimation of carrier-frequency offset and timing offset for OFDM systems over multipath fading channels",

abstract = "This paper presents an algorithm for joint estimation of carrier-frequency offset and timing offset for orthogonal frequency-division multiplexing (OFDM) systems in the tracking mode. The proposed weighted least-squares algorithm derives its estimates based on phase differences in the received pilot subcarrier signals between two symbols. Moreover, the optimal weights in two different channel conditions are derived. Both analysis and simulation show that the weighted least-squares algorithm can effectively and accurately estimate the carrier-frequency offset as well as the timing offset of OFDM signals in multipath fading channels.",

keywords = "Carrier-frequency offset, Estimation, Synchronization, Timing offset, Weighted least squares",

author = "Tsai, {Pei Yun} and Kang, {Hsin Yu} and Chiueh, {Tzi Dar}",

note = "Funding Information: Manuscript received November 3, 2003; revised April 26, 2004, August 17, 2004, and September 13, 2004. This work was supported in part by the National Science Council, Taiwan, under Grant NSC91-2219-E-002-022. This work was presented in part at the IEEE Vehicular Technology Conference (VTC), Cheju, Korea, Spring 2003. The review of this paper was coordinated by Prof. T. Lok.",

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AU - Chiueh, Tzi Dar

N1 - Funding Information: Manuscript received November 3, 2003; revised April 26, 2004, August 17, 2004, and September 13, 2004. This work was supported in part by the National Science Council, Taiwan, under Grant NSC91-2219-E-002-022. This work was presented in part at the IEEE Vehicular Technology Conference (VTC), Cheju, Korea, Spring 2003. The review of this paper was coordinated by Prof. T. Lok.

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N2 - This paper presents an algorithm for joint estimation of carrier-frequency offset and timing offset for orthogonal frequency-division multiplexing (OFDM) systems in the tracking mode. The proposed weighted least-squares algorithm derives its estimates based on phase differences in the received pilot subcarrier signals between two symbols. Moreover, the optimal weights in two different channel conditions are derived. Both analysis and simulation show that the weighted least-squares algorithm can effectively and accurately estimate the carrier-frequency offset as well as the timing offset of OFDM signals in multipath fading channels.

AB - This paper presents an algorithm for joint estimation of carrier-frequency offset and timing offset for orthogonal frequency-division multiplexing (OFDM) systems in the tracking mode. The proposed weighted least-squares algorithm derives its estimates based on phase differences in the received pilot subcarrier signals between two symbols. Moreover, the optimal weights in two different channel conditions are derived. Both analysis and simulation show that the weighted least-squares algorithm can effectively and accurately estimate the carrier-frequency offset as well as the timing offset of OFDM signals in multipath fading channels.

KW - Carrier-frequency offset

KW - Estimation

KW - Synchronization

KW - Timing offset

KW - Weighted least squares

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Joint weighted least-squares estimation of carrier-frequency offset and timing offset for OFDM systems over multipath fading channels

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Keywords

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