Blind CFO Estimation Based on Decision Directed MVDR Approach for Interleaved OFDMA Uplink Systems

Chih-Chang SHEN; Ann-Chen CHANG

doi:10.1587/transcom.E97.B.137

Blind CFO Estimation Based on Decision Directed MVDR Approach for Interleaved OFDMA Uplink Systems

Chih-Chang SHEN, Ann-Chen CHANG

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This paper deals with carrier frequency offset (CFO) estimation based on the minimum variance distortionless response (MVDR) criterion without using specific training sequences for interleaved orthogonal frequency division multiple access (OFDMA) uplink systems. In the presence of large CFOs, the estimator is proposed to find a new CFO vector based on the first-order Taylor series expansion of the one initially given. The problem of finding the new CFO vector is formulated as the closed form of a generalized eigenvalue problem, which allows one to readily solve it. Since raising the accuracy of residual CFO estimation can provide more accurate residual CFO compensation, this paper also present a decision-directed MVDR approach to improve the CFO estimation performance. However, the proposed estimator can estimate CFOs with less computation load. Several computer simulation results are provided for illustrating the effectiveness of the proposed blind estimate approach.

Publication: IEICE TRANSACTIONS on Communications Vol.E97-B No.1 pp.137-145

Publication Date: 2014/01/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E97.B.137

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Authors

Chih-Chang SHEN
Ling Tung University
Ann-Chen CHANG
Ling Tung University

Keyword

CFO, interleaved OFDMA, MVDR, Taylor series expansion, iterative approach, decision directed

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Chih-Chang SHEN, Ann-Chen CHANG, "Blind CFO Estimation Based on Decision Directed MVDR Approach for Interleaved OFDMA Uplink Systems" in IEICE TRANSACTIONS on Communications, vol. E97-B, no. 1, pp. 137-145, January 2014, doi: 10.1587/transcom.E97.B.137.
Abstract: This paper deals with carrier frequency offset (CFO) estimation based on the minimum variance distortionless response (MVDR) criterion without using specific training sequences for interleaved orthogonal frequency division multiple access (OFDMA) uplink systems. In the presence of large CFOs, the estimator is proposed to find a new CFO vector based on the first-order Taylor series expansion of the one initially given. The problem of finding the new CFO vector is formulated as the closed form of a generalized eigenvalue problem, which allows one to readily solve it. Since raising the accuracy of residual CFO estimation can provide more accurate residual CFO compensation, this paper also present a decision-directed MVDR approach to improve the CFO estimation performance. However, the proposed estimator can estimate CFOs with less computation load. Several computer simulation results are provided for illustrating the effectiveness of the proposed blind estimate approach.
URL: https://globals.ieice.org/en_transactions/communications/10.1587/transcom.E97.B.137/_p

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@ARTICLE{e97-b_1_137,
author={Chih-Chang SHEN, Ann-Chen CHANG, },
journal={IEICE TRANSACTIONS on Communications},
title={Blind CFO Estimation Based on Decision Directed MVDR Approach for Interleaved OFDMA Uplink Systems},
year={2014},
volume={E97-B},
number={1},
pages={137-145},
abstract={This paper deals with carrier frequency offset (CFO) estimation based on the minimum variance distortionless response (MVDR) criterion without using specific training sequences for interleaved orthogonal frequency division multiple access (OFDMA) uplink systems. In the presence of large CFOs, the estimator is proposed to find a new CFO vector based on the first-order Taylor series expansion of the one initially given. The problem of finding the new CFO vector is formulated as the closed form of a generalized eigenvalue problem, which allows one to readily solve it. Since raising the accuracy of residual CFO estimation can provide more accurate residual CFO compensation, this paper also present a decision-directed MVDR approach to improve the CFO estimation performance. However, the proposed estimator can estimate CFOs with less computation load. Several computer simulation results are provided for illustrating the effectiveness of the proposed blind estimate approach.},
keywords={},
doi={10.1587/transcom.E97.B.137},
ISSN={1745-1345},
month={January},}

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TY - JOUR
TI - Blind CFO Estimation Based on Decision Directed MVDR Approach for Interleaved OFDMA Uplink Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 137
EP - 145
AU - Chih-Chang SHEN
AU - Ann-Chen CHANG
PY - 2014
DO - 10.1587/transcom.E97.B.137
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E97-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2014
AB - This paper deals with carrier frequency offset (CFO) estimation based on the minimum variance distortionless response (MVDR) criterion without using specific training sequences for interleaved orthogonal frequency division multiple access (OFDMA) uplink systems. In the presence of large CFOs, the estimator is proposed to find a new CFO vector based on the first-order Taylor series expansion of the one initially given. The problem of finding the new CFO vector is formulated as the closed form of a generalized eigenvalue problem, which allows one to readily solve it. Since raising the accuracy of residual CFO estimation can provide more accurate residual CFO compensation, this paper also present a decision-directed MVDR approach to improve the CFO estimation performance. However, the proposed estimator can estimate CFOs with less computation load. Several computer simulation results are provided for illustrating the effectiveness of the proposed blind estimate approach.
ER -