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학술대회 Efficient Time and Frequency Offset Estimation for OFDM based MSS Systems
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저자
김희욱, 구본준, 강군석, 안도섭
발행일
200609
출처
Vehicular Technology Conference (VTC) 2006 (Fall), pp.2766-2770
DOI
https://dx.doi.org/10.1109/VTCF.2006.568
협약과제
05MR2800, 위성 IMT-2000+ 기술 개발, 안도섭
초록
We consider efficient time and frequency synchronization using one training symbol with a constant envelop for orthogonal frequency division multiplexing (OFDM) based mobile satellite service (MSS) Systems over rician fading channel. We propose a new preamble corresponding to only one OFDM symbol, where multiplication of a value of one sample and a conjugated value of its neighboring sample becomes CAZAC sequence in time domain, and present joint frame/symbol timing and frequency synchronization method through only time domain processing based on this preamble. By the proposed method, the accuracy of the frame/symbol timing synchronization is obviously improved and an estimation range of the frequency offset normalized by the carrier spacing is extremely extended to one half of the total signal bandwidth with only one preamble symbol which has lower peak to average power ratio (PAPR) than those in conventional schemes. The performance of the proposed method is shown by simulation. © 2006 IEEE.
KSP 제안 키워드
CAZAC sequence, Constant envelop, Frequency Offset Estimation, Mobile satellite, Orthogonal frequency division Multiplexing(OFDM), Peak-to-Average-Power-Ratio(PAPR), Rician Fading channel, Symbol timing synchronization, signal bandwidth, synchronization method, time and Frequency synchronization