Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems

Man On Pun; Shang-Ho Tsai; C. C. Jay Kuo

doi:10.1109/GLOCOM.2004.1379069

Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems

Man On Pun^*, Shang-Ho Tsai, C. C. Jay Kuo

^*Corresponding author for this work

Department of Electrical and Computer Engineering

Research output: Contribution to conference › Paper › peer-review

31 Scopus citations

Abstract

A maximum likelihood estimator (MLE) that jointly estimates the carrier frequency offset (CFO) and the channel response of each user in uplink OFDMA systems is investigated in this research. The proposed MLE distinguishes itself from existing methods by its applicability to more flexible carrier assignment schemes. It achieves high computational efficiency by transforming a multidimensional optimization problem into a one-dimensional optimization problem. A suboptimal method is developed to further reduce the computational complexity. It is demonstrated by simulation results that the proposed MLE can provide accurate CFO and channel estimation in both SISO and SIMO environments.

Original language	English
Pages	3748-3752
Number of pages	5
DOIs	https://doi.org/10.1109/GLOCOM.2004.1379069
State	Published - 1 Dec 2004
Event	GLOBECOM'04 - IEEE Global Telecommunications Conference - Dallas, TX, United States Duration: 29 Nov 2004 → 3 Dec 2004

Conference

Conference	GLOBECOM'04 - IEEE Global Telecommunications Conference
Country/Territory	United States
City	Dallas, TX
Period	29/11/04 → 3/12/04

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10.1109/GLOCOM.2004.1379069

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abstract = "A maximum likelihood estimator (MLE) that jointly estimates the carrier frequency offset (CFO) and the channel response of each user in uplink OFDMA systems is investigated in this research. The proposed MLE distinguishes itself from existing methods by its applicability to more flexible carrier assignment schemes. It achieves high computational efficiency by transforming a multidimensional optimization problem into a one-dimensional optimization problem. A suboptimal method is developed to further reduce the computational complexity. It is demonstrated by simulation results that the proposed MLE can provide accurate CFO and channel estimation in both SISO and SIMO environments.",

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AB - A maximum likelihood estimator (MLE) that jointly estimates the carrier frequency offset (CFO) and the channel response of each user in uplink OFDMA systems is investigated in this research. The proposed MLE distinguishes itself from existing methods by its applicability to more flexible carrier assignment schemes. It achieves high computational efficiency by transforming a multidimensional optimization problem into a one-dimensional optimization problem. A suboptimal method is developed to further reduce the computational complexity. It is demonstrated by simulation results that the proposed MLE can provide accurate CFO and channel estimation in both SISO and SIMO environments.

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Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems

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