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:10.1117/12.541970

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 journal › Conference article › peer-review

2 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
Article number	20
Pages (from-to)	216-227
Number of pages	12
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	5440
DOIs	https://doi.org/10.1117/12.541970
State	Published - 1 Dec 2004
Event	Digital Wireless Communications VI - Orlando, FL, United States Duration: 12 Apr 2004 → 13 Apr 2004

Keywords

Carrier frequency offset
Channel estimation
Maximum likelihood (ML)
OFDMA
Uplink synchronization

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title = "Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems",

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.",

keywords = "Carrier frequency offset, Channel estimation, Maximum likelihood (ML), OFDMA, Uplink synchronization",

author = "Pun, {Man On} and Shang-Ho Tsai and Kuo, {C. C.Jay}",

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T1 - Joint maximum likelihood estimation of carrier frequency offset and channel in uplink OFDMA systems

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) 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.

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.

KW - Carrier frequency offset

KW - Channel estimation

KW - Maximum likelihood (ML)

KW - OFDMA

KW - Uplink synchronization

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U2 - 10.1117/12.541970

DO - 10.1117/12.541970

M3 - Conference article

AN - SCOPUS:11844254854

SN - 0277-786X

VL - 5440

SP - 216

EP - 227

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

M1 - 20

T2 - Digital Wireless Communications VI

Y2 - 12 April 2004 through 13 April 2004

ER -

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

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Keywords

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