New Simultaneous Timing and Frequency Synchronization Utilizing Matched Filters for OFDM Systems

Shigenori KINJO; Hiroshi OCHI

doi:10.1093/ietfec/e90-a.8.1601

New Simultaneous Timing and Frequency Synchronization Utilizing Matched Filters for OFDM Systems

Shigenori KINJO, Hiroshi OCHI

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Orthogonal frequency division multiplexing (OFDM) is an attractive technique to accomplish wired or wireless broadband communications. Since it has been adopted as the terrestrial digital-video-broadcasting standard in Europe, it has also subsequently been embedded into many broadband communication standards. Many techniques for frame timing and frequency synchronization of OFDM systems have been studied as a result of its increasing importance. We propose a new technique of simultaneously synchronizing frame timing and frequency utilizing matched filters. First, a new short preamble consisting of short sequences multiplied by a DBPSK coded sequence is proposed. Second, we show that the new short preamble results in a new structure for matched filters consisting of a first matched filter, a DBPSK decoder, and a second matched filter. We can avoid the adverse effects of carrier frequency offset (CFO) when frame timing is synchronized because a DBPSK decoder has been deployed between the first and second matched filters. In addition, we show that the CFO can be directly estimated from the peak value of matched filter output. Finally, our simulation results demonstrate that the proposed scheme outperforms the conventional schemes.

Publication: IEICE TRANSACTIONS on Fundamentals Vol.E90-A No.8 pp.1601-1610

Publication Date: 2007/08/01

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Online ISSN: 1745-1337

DOI: 10.1093/ietfec/e90-a.8.1601

Type of Manuscript: Special Section PAPER (Special Section on Papers Selected from the 21st Symposium on Signal Processing)

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Shigenori KINJO, Hiroshi OCHI, "New Simultaneous Timing and Frequency Synchronization Utilizing Matched Filters for OFDM Systems" in IEICE TRANSACTIONS on Fundamentals, vol. E90-A, no. 8, pp. 1601-1610, August 2007, doi: 10.1093/ietfec/e90-a.8.1601.
Abstract: Orthogonal frequency division multiplexing (OFDM) is an attractive technique to accomplish wired or wireless broadband communications. Since it has been adopted as the terrestrial digital-video-broadcasting standard in Europe, it has also subsequently been embedded into many broadband communication standards. Many techniques for frame timing and frequency synchronization of OFDM systems have been studied as a result of its increasing importance. We propose a new technique of simultaneously synchronizing frame timing and frequency utilizing matched filters. First, a new short preamble consisting of short sequences multiplied by a DBPSK coded sequence is proposed. Second, we show that the new short preamble results in a new structure for matched filters consisting of a first matched filter, a DBPSK decoder, and a second matched filter. We can avoid the adverse effects of carrier frequency offset (CFO) when frame timing is synchronized because a DBPSK decoder has been deployed between the first and second matched filters. In addition, we show that the CFO can be directly estimated from the peak value of matched filter output. Finally, our simulation results demonstrate that the proposed scheme outperforms the conventional schemes.
URL: https://globals.ieice.org/en_transactions/fundamentals/10.1093/ietfec/e90-a.8.1601/_p

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@ARTICLE{e90-a_8_1601,
author={Shigenori KINJO, Hiroshi OCHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={New Simultaneous Timing and Frequency Synchronization Utilizing Matched Filters for OFDM Systems},
year={2007},
volume={E90-A},
number={8},
pages={1601-1610},
abstract={Orthogonal frequency division multiplexing (OFDM) is an attractive technique to accomplish wired or wireless broadband communications. Since it has been adopted as the terrestrial digital-video-broadcasting standard in Europe, it has also subsequently been embedded into many broadband communication standards. Many techniques for frame timing and frequency synchronization of OFDM systems have been studied as a result of its increasing importance. We propose a new technique of simultaneously synchronizing frame timing and frequency utilizing matched filters. First, a new short preamble consisting of short sequences multiplied by a DBPSK coded sequence is proposed. Second, we show that the new short preamble results in a new structure for matched filters consisting of a first matched filter, a DBPSK decoder, and a second matched filter. We can avoid the adverse effects of carrier frequency offset (CFO) when frame timing is synchronized because a DBPSK decoder has been deployed between the first and second matched filters. In addition, we show that the CFO can be directly estimated from the peak value of matched filter output. Finally, our simulation results demonstrate that the proposed scheme outperforms the conventional schemes.},
keywords={},
doi={10.1093/ietfec/e90-a.8.1601},
ISSN={1745-1337},
month={August},}

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TY - JOUR
TI - New Simultaneous Timing and Frequency Synchronization Utilizing Matched Filters for OFDM Systems
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 1601
EP - 1610
AU - Shigenori KINJO
AU - Hiroshi OCHI
PY - 2007
DO - 10.1093/ietfec/e90-a.8.1601
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E90-A
IS - 8
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - August 2007
AB - Orthogonal frequency division multiplexing (OFDM) is an attractive technique to accomplish wired or wireless broadband communications. Since it has been adopted as the terrestrial digital-video-broadcasting standard in Europe, it has also subsequently been embedded into many broadband communication standards. Many techniques for frame timing and frequency synchronization of OFDM systems have been studied as a result of its increasing importance. We propose a new technique of simultaneously synchronizing frame timing and frequency utilizing matched filters. First, a new short preamble consisting of short sequences multiplied by a DBPSK coded sequence is proposed. Second, we show that the new short preamble results in a new structure for matched filters consisting of a first matched filter, a DBPSK decoder, and a second matched filter. We can avoid the adverse effects of carrier frequency offset (CFO) when frame timing is synchronized because a DBPSK decoder has been deployed between the first and second matched filters. In addition, we show that the CFO can be directly estimated from the peak value of matched filter output. Finally, our simulation results demonstrate that the proposed scheme outperforms the conventional schemes.
ER -