标题: | A low-complexity frame synchronization and frequency offset compensation scheme for OFDM systems over fading channels |
作者: | Hsieh, MH Wei, CH 电子工程学系及电子研究所 Department of Electronics Engineering and Institute of Electronics |
关键字: | frame synchronization;frequency offset compensation;low-complexity algorithms;OFDM |
公开日期: | 1-九月-1999 |
摘要: | dThis paper presents a fast low-complexity synchronization scheme for orthogonal frequency division multiplexing (OFDM) systems over fading channels. By utilizing the guard interval in OFDM signals, the Frame synchronization and the frequency offset estimation are considered simultaneously. The Implementation can be simplified by only using the sign bits of the in-phase and the quadrature components of the received OFDM signal for frame synchronization and frequency offset compensation. A frequency-offset independent frame synchronization algorithm is derived, and a low-complexity frequency offset estimator based on the synchronized correlator output is presented in this paper. Due to the subcarrier ambiguity in the guard-interval-based (GIB) frequency detector, the maximum correctable frequency range is limited to +/- 1/2 of the subcarrier spacing. In this paper, we also present a new frequency acquisition scheme that can solve the subcarrier ambiguity problem and extend the frequency acquisition range to nearly a half of the useful OFDM signal bandwidth. |
URI: | http://dx.doi.org/10.1109/25.790537 http://hdl.handle.net/11536/31099 |
ISSN: | 0018-9545 |
DOI: | 10.1109/25.790537 |
期刊: | IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY |
Volume: | 48 |
Issue: | 5 |
起始页: | 1596 |
结束页: | 1609 |
显示于类别: | Articles |
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