通信学报2017，Vol.38Issue(3)：45-52,8.DOI:10.11959/j.issn.1000-436x.2017060
基于多符号BEM的OFDM系统时变信道估计
Time-varying channel estimation in OFDM systems based on multiple symbols BEM
摘要
Abstract
In view of the problem of low frequency spectrum utilization for the time-varying channel estimation in orthogonal frequency division multiplexing(OFDM) systems based on basis expansion model (BEM),a new method based on multiple symbols BEM was proposed.Compared with the conventional method based on single symbol,the proposed method reduced the subcarriers for pilots.And by means of the baseline tilting technique,the new method mitigated the Gibbs phenomenon caused by Fourier series expansion.The theoretical analysis reveals that the channel model error is reduced due to the introduction of the baseline tiring technique when the normalized Doppler frequency is no more than 1/2-1/M/N1+g/NFinally,the numerical simulation shows that compared with conventional methods,the proposed algorithm achieves significant improvement on the estimation error performance and bit error rate (BER) performance under the conditions of the corresponding time-varying channel.关键词
正交频分复用/信道估计/基扩展模型/多符号Key words
orthogonal frequency division multiplexing/channel estimation/basis expansion model (BEM)/multiple symbol分类
信息技术与安全科学引用本文复制引用
丁勇,欧阳缮,谢跃雷,蒋俊正,陈小毛..基于多符号BEM的OFDM系统时变信道估计[J].通信学报,2017,38(3):45-52,8.基金项目
国家自然科学基金资助项目(No.61371186,No.61461015,No.61261032,No.61261018) （No.61371186,No.61461015,No.61261032,No.61261018）
广西区自然科学基金资助项目(No.2013GXNSFFA019004,No.2015GXNSFAA139302) （No.2013GXNSFFA019004,No.2015GXNSFAA139302）
广西无线宽带通信与信号处理重点实验室基金资助项目(No.GXKL06160101)The National Natural Science Foundation of China (No.61371186,No.61461015,No.61261032,No.61261018),The Natural Science Foundation of Guangxi (No.2013GXNSFFA019004,No.2015GXNSFAA139302),Foundation of Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing (No.GXKL06160101) （No.GXKL06160101）
