Frequency Offset Estimation for OFDM Systems with a Novel Frequency Domain Training Sequence

Yanxiang JIANG; Xiqi GAO; Xiaohu YOU

doi:10.1093/ietcom/e89-b.4.1194

Frequency Offset Estimation for OFDM Systems with a Novel Frequency Domain Training Sequence

Yanxiang JIANG, Xiqi GAO, Xiaohu YOU

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A novel frequency domain training sequence and the corresponding carrier frequency offset (CFO) estimator are proposed for orthogonal frequency division multiplexing (OFDM) systems over frequency-selective fading channels. The proposed frequency domain training sequence comprises two types of pilot tones, namely distinctively spaced pilot tones with high energies and uniformly spaced ones with low energies. Based on the distinctively spaced pilot tones, integer CFO estimation is accomplished. After the subcarriers occupied by the distinctively spaced pilot tones and their adjacent subcarriers are nulled for the sake of interference cancellation, fractional CFO estimation is executed according to the uniformly spaced pilot tones. By exploiting a predefined lookup table making the best of the structure of the distinctively spaced pilot tones, computational complexity of the proposed CFO estimator can be decreased considerably. With the aid of the uniformly spaced pilot tones generated from Chu sequence with cyclically orthogonal property, the ability of the proposed estimator to combat multipath effect is enhanced to a great extent. Simulation results illustrate the good performance of the proposed CFO estimator.

Publication: IEICE TRANSACTIONS on Communications Vol.E89-B No.4 pp.1194-1204

Publication Date: 2006/04/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e89-b.4.1194

Type of Manuscript: PAPER

Category: Transmission Systems and Transmission Equipment for Communications

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Yanxiang JIANG, Xiqi GAO, Xiaohu YOU, "Frequency Offset Estimation for OFDM Systems with a Novel Frequency Domain Training Sequence" in IEICE TRANSACTIONS on Communications, vol. E89-B, no. 4, pp. 1194-1204, April 2006, doi: 10.1093/ietcom/e89-b.4.1194.
Abstract: A novel frequency domain training sequence and the corresponding carrier frequency offset (CFO) estimator are proposed for orthogonal frequency division multiplexing (OFDM) systems over frequency-selective fading channels. The proposed frequency domain training sequence comprises two types of pilot tones, namely distinctively spaced pilot tones with high energies and uniformly spaced ones with low energies. Based on the distinctively spaced pilot tones, integer CFO estimation is accomplished. After the subcarriers occupied by the distinctively spaced pilot tones and their adjacent subcarriers are nulled for the sake of interference cancellation, fractional CFO estimation is executed according to the uniformly spaced pilot tones. By exploiting a predefined lookup table making the best of the structure of the distinctively spaced pilot tones, computational complexity of the proposed CFO estimator can be decreased considerably. With the aid of the uniformly spaced pilot tones generated from Chu sequence with cyclically orthogonal property, the ability of the proposed estimator to combat multipath effect is enhanced to a great extent. Simulation results illustrate the good performance of the proposed CFO estimator.
URL: https://globals.ieice.org/en_transactions/communications/10.1093/ietcom/e89-b.4.1194/_p

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@ARTICLE{e89-b_4_1194,
author={Yanxiang JIANG, Xiqi GAO, Xiaohu YOU, },
journal={IEICE TRANSACTIONS on Communications},
title={Frequency Offset Estimation for OFDM Systems with a Novel Frequency Domain Training Sequence},
year={2006},
volume={E89-B},
number={4},
pages={1194-1204},
abstract={A novel frequency domain training sequence and the corresponding carrier frequency offset (CFO) estimator are proposed for orthogonal frequency division multiplexing (OFDM) systems over frequency-selective fading channels. The proposed frequency domain training sequence comprises two types of pilot tones, namely distinctively spaced pilot tones with high energies and uniformly spaced ones with low energies. Based on the distinctively spaced pilot tones, integer CFO estimation is accomplished. After the subcarriers occupied by the distinctively spaced pilot tones and their adjacent subcarriers are nulled for the sake of interference cancellation, fractional CFO estimation is executed according to the uniformly spaced pilot tones. By exploiting a predefined lookup table making the best of the structure of the distinctively spaced pilot tones, computational complexity of the proposed CFO estimator can be decreased considerably. With the aid of the uniformly spaced pilot tones generated from Chu sequence with cyclically orthogonal property, the ability of the proposed estimator to combat multipath effect is enhanced to a great extent. Simulation results illustrate the good performance of the proposed CFO estimator.},
keywords={},
doi={10.1093/ietcom/e89-b.4.1194},
ISSN={1745-1345},
month={April},}

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TY - JOUR
TI - Frequency Offset Estimation for OFDM Systems with a Novel Frequency Domain Training Sequence
T2 - IEICE TRANSACTIONS on Communications
SP - 1194
EP - 1204
AU - Yanxiang JIANG
AU - Xiqi GAO
AU - Xiaohu YOU
PY - 2006
DO - 10.1093/ietcom/e89-b.4.1194
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E89-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2006
AB - A novel frequency domain training sequence and the corresponding carrier frequency offset (CFO) estimator are proposed for orthogonal frequency division multiplexing (OFDM) systems over frequency-selective fading channels. The proposed frequency domain training sequence comprises two types of pilot tones, namely distinctively spaced pilot tones with high energies and uniformly spaced ones with low energies. Based on the distinctively spaced pilot tones, integer CFO estimation is accomplished. After the subcarriers occupied by the distinctively spaced pilot tones and their adjacent subcarriers are nulled for the sake of interference cancellation, fractional CFO estimation is executed according to the uniformly spaced pilot tones. By exploiting a predefined lookup table making the best of the structure of the distinctively spaced pilot tones, computational complexity of the proposed CFO estimator can be decreased considerably. With the aid of the uniformly spaced pilot tones generated from Chu sequence with cyclically orthogonal property, the ability of the proposed estimator to combat multipath effect is enhanced to a great extent. Simulation results illustrate the good performance of the proposed CFO estimator.
ER -