A Carrier Frequency Offset and Timing Offset Detection Scheme for OFDM Systems Utilizing Pilot Sub-Carriers

Takashi WAKUTSU; Mutsumu SERIZAWA

A Carrier Frequency Offset and Timing Offset Detection Scheme for OFDM Systems Utilizing Pilot Sub-Carriers

Takashi WAKUTSU, Mutsumu SERIZAWA

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A novel carrier frequency offset and timing offset detection scheme for orthogonal frequency division multiplexing (OFDM) is proposed. The carrier frequency offset is detected by utilizing a certain a-priori known pattern of power differences along the sub-carrier index. The power difference is caused by the collapse of the orthogonal condition. In order that the power differences are effectively influenced by the frequency offset, time-domain windowing is employed. Timing offset is detected by utilizing average phase rotation according to the sub-carrier index. Moreover, by applying the cyclically mapped sequence as a pilot sequence, the computational complexity for reference signal generation is reduced. Additionally, a simplified burst frame searcher is possible if the sliding correlator is applied as a burst frame searcher. The proposed scheme is advantageous for designing the air-frame format, because the operation for synchronization is done using only one pilot symbol. The simulation results of the offset detection performance are shown, and the validity of the proposed offset detection scheme is presented.

Publication: IEICE TRANSACTIONS on Communications Vol.E83-B No.8 pp.1854-1863

Publication Date: 2000/08/25

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Type of Manuscript: Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)

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Takashi WAKUTSU, Mutsumu SERIZAWA, "A Carrier Frequency Offset and Timing Offset Detection Scheme for OFDM Systems Utilizing Pilot Sub-Carriers" in IEICE TRANSACTIONS on Communications, vol. E83-B, no. 8, pp. 1854-1863, August 2000, doi: .
Abstract: A novel carrier frequency offset and timing offset detection scheme for orthogonal frequency division multiplexing (OFDM) is proposed. The carrier frequency offset is detected by utilizing a certain a-priori known pattern of power differences along the sub-carrier index. The power difference is caused by the collapse of the orthogonal condition. In order that the power differences are effectively influenced by the frequency offset, time-domain windowing is employed. Timing offset is detected by utilizing average phase rotation according to the sub-carrier index. Moreover, by applying the cyclically mapped sequence as a pilot sequence, the computational complexity for reference signal generation is reduced. Additionally, a simplified burst frame searcher is possible if the sliding correlator is applied as a burst frame searcher. The proposed scheme is advantageous for designing the air-frame format, because the operation for synchronization is done using only one pilot symbol. The simulation results of the offset detection performance are shown, and the validity of the proposed offset detection scheme is presented.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e83-b_8_1854/_p

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@ARTICLE{e83-b_8_1854,
author={Takashi WAKUTSU, Mutsumu SERIZAWA, },
journal={IEICE TRANSACTIONS on Communications},
title={A Carrier Frequency Offset and Timing Offset Detection Scheme for OFDM Systems Utilizing Pilot Sub-Carriers},
year={2000},
volume={E83-B},
number={8},
pages={1854-1863},
abstract={A novel carrier frequency offset and timing offset detection scheme for orthogonal frequency division multiplexing (OFDM) is proposed. The carrier frequency offset is detected by utilizing a certain a-priori known pattern of power differences along the sub-carrier index. The power difference is caused by the collapse of the orthogonal condition. In order that the power differences are effectively influenced by the frequency offset, time-domain windowing is employed. Timing offset is detected by utilizing average phase rotation according to the sub-carrier index. Moreover, by applying the cyclically mapped sequence as a pilot sequence, the computational complexity for reference signal generation is reduced. Additionally, a simplified burst frame searcher is possible if the sliding correlator is applied as a burst frame searcher. The proposed scheme is advantageous for designing the air-frame format, because the operation for synchronization is done using only one pilot symbol. The simulation results of the offset detection performance are shown, and the validity of the proposed offset detection scheme is presented.},
keywords={},
doi={},
ISSN={},
month={August},}

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TY - JOUR
TI - A Carrier Frequency Offset and Timing Offset Detection Scheme for OFDM Systems Utilizing Pilot Sub-Carriers
T2 - IEICE TRANSACTIONS on Communications
SP - 1854
EP - 1863
AU - Takashi WAKUTSU
AU - Mutsumu SERIZAWA
PY - 2000
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E83-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2000
AB - A novel carrier frequency offset and timing offset detection scheme for orthogonal frequency division multiplexing (OFDM) is proposed. The carrier frequency offset is detected by utilizing a certain a-priori known pattern of power differences along the sub-carrier index. The power difference is caused by the collapse of the orthogonal condition. In order that the power differences are effectively influenced by the frequency offset, time-domain windowing is employed. Timing offset is detected by utilizing average phase rotation according to the sub-carrier index. Moreover, by applying the cyclically mapped sequence as a pilot sequence, the computational complexity for reference signal generation is reduced. Additionally, a simplified burst frame searcher is possible if the sliding correlator is applied as a burst frame searcher. The proposed scheme is advantageous for designing the air-frame format, because the operation for synchronization is done using only one pilot symbol. The simulation results of the offset detection performance are shown, and the validity of the proposed offset detection scheme is presented.
ER -