An EM-based joint maximum likelihood estimation of carrier frequency offset and channel for uplink OFDMA systems

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

doi:10.1109/VETECF.2004.1400077

An EM-based joint maximum likelihood estimation of carrier frequency offset and channel for 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 journal › Conference article › peer-review

33 Scopus citations

Abstract

A maximum likelihood estimator (MLE) based on Expectation Maximization (EM) method is presented to jointly estimate the carrier frequency offset (CFO) and the channel of each user in uplink OFDMA systems. The proposed MLE distinguishes itself from existing methods by its applicability to any arbitrary carrier assignment, schemes. The proposed MLE achieves high computational efficiency by transforming a multidimensional maximization problem into a number of substantially smaller separate maximization problems. Computer experiments have been conducted to confirm the effectiveness of the proposed estimators in estimation accuracy and robustness against the near-far effect.

Original language	English
Pages (from-to)	598-602
Number of pages	5
Journal	IEEE Vehicular Technology Conference
Volume	60
Issue number	1
DOIs	https://doi.org/10.1109/VETECF.2004.1400077
State	Published - 1 Dec 2004
Event	2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States Duration: 26 Sep 2004 → 29 Sep 2004

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abstract = "A maximum likelihood estimator (MLE) based on Expectation Maximization (EM) method is presented to jointly estimate the carrier frequency offset (CFO) and the channel of each user in uplink OFDMA systems. The proposed MLE distinguishes itself from existing methods by its applicability to any arbitrary carrier assignment, schemes. The proposed MLE achieves high computational efficiency by transforming a multidimensional maximization problem into a number of substantially smaller separate maximization problems. Computer experiments have been conducted to confirm the effectiveness of the proposed estimators in estimation accuracy and robustness against the near-far effect.",

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AU - Pun, Man On

AU - Tsai, Shang-Ho

AU - Kuo, C. C.Jay

PY - 2004/12/1

Y1 - 2004/12/1

N2 - A maximum likelihood estimator (MLE) based on Expectation Maximization (EM) method is presented to jointly estimate the carrier frequency offset (CFO) and the channel of each user in uplink OFDMA systems. The proposed MLE distinguishes itself from existing methods by its applicability to any arbitrary carrier assignment, schemes. The proposed MLE achieves high computational efficiency by transforming a multidimensional maximization problem into a number of substantially smaller separate maximization problems. Computer experiments have been conducted to confirm the effectiveness of the proposed estimators in estimation accuracy and robustness against the near-far effect.

AB - A maximum likelihood estimator (MLE) based on Expectation Maximization (EM) method is presented to jointly estimate the carrier frequency offset (CFO) and the channel of each user in uplink OFDMA systems. The proposed MLE distinguishes itself from existing methods by its applicability to any arbitrary carrier assignment, schemes. The proposed MLE achieves high computational efficiency by transforming a multidimensional maximization problem into a number of substantially smaller separate maximization problems. Computer experiments have been conducted to confirm the effectiveness of the proposed estimators in estimation accuracy and robustness against the near-far effect.

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U2 - 10.1109/VETECF.2004.1400077

DO - 10.1109/VETECF.2004.1400077

M3 - Conference article

AN - SCOPUS:17144422159

SN - 1550-2252

VL - 60

SP - 598

EP - 602

JO - IEEE Vehicular Technology Conference

JF - IEEE Vehicular Technology Conference

IS - 1

T2 - 2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security

Y2 - 26 September 2004 through 29 September 2004

ER -

An EM-based joint maximum likelihood estimation of carrier frequency offset and channel for uplink OFDMA systems

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