Progressive iterative channel estimation in 
fast time-varying OFDM systems

doi:10.1016/S1005-8885(14)60309-5

中国邮电高校学报(英文) ›› 2014, Vol. 21 ›› Issue (4): 8-14.doi: 10.1016/S1005-8885(14)60309-5

Progressive iterative channel estimation in fast time-varying OFDM systems

杨睿哲¹,叶斯洋¹,²,张延华²,²,孙艳华¹,²,Richard Yu²,³

1. College of Electronics Information and Control Engineering, Beijing University of Technology, Beijing 100124, China 2. Department of Systems and Computer Engineering, Carleton University, Ottawa, ON Canada

收稿日期:2013-12-10 修回日期:2014-05-09 出版日期:2014-08-31 发布日期:2014-08-30
通讯作者: 杨睿哲 E-mail:xiangshe124@139.com
基金资助:
基于多模型的信道混合估计理论及方法;格约减理论在MIMO系统中的应用;绿色无线通信网络的基础理论和方法研究

Progressive iterative channel estimation in fast time-varying OFDM systems

1. College of Electronics Information and Control Engineering, Beijing University of Technology, Beijing 100124, China 2. Department of Systems and Computer Engineering, Carleton University, Ottawa, ON Canada

Received:2013-12-10 Revised:2014-05-09 Online:2014-08-31 Published:2014-08-30
Contact: Rui-Zhe Yang E-mail:xiangshe124@139.com

摘要/Abstract

摘要： Considering the joint channel estimation and data detection in time-varying orthogonal frequency division multiplexing (OFDM) and addressing transmission performance degradation induced by the severe inter-carrier interference (ICI) at very high speed, a new progressive iterative channel estimation scheme is proposed. To alleviate the error propagation of the inaccurate data due to ICI, the measurement subcarriers in the Kalman filter is designed to be extended from pilots subcarriers to all the subcarriers progressively through the iterations. Furthermore, in iteration process, the interference of the non-pilot data to the measurement subcarriers is considered to be part of noise in the modified Kalman filter, which improves the estimation accuracy. Simulation indicates that the proposed scheme improves the performance in fast time-varying situation.

关键词: time-varying OFDM, channel estimation, ICI, progressive, Kalman

Abstract: Considering the joint channel estimation and data detection in time-varying orthogonal frequency division multiplexing (OFDM) and addressing transmission performance degradation induced by the severe inter-carrier interference (ICI) at very high speed, a new progressive iterative channel estimation scheme is proposed. To alleviate the error propagation of the inaccurate data due to ICI, the measurement subcarriers in the Kalman filter is designed to be extended from pilots subcarriers to all the subcarriers progressively through the iterations. Furthermore, in iteration process, the interference of the non-pilot data to the measurement subcarriers is considered to be part of noise in the modified Kalman filter, which improves the estimation accuracy. Simulation indicates that the proposed scheme improves the performance in fast time-varying situation.

Key words: time-varying OFDM, channel estimation, ICI, progressive, Kalman

参考文献

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Progressive iterative channel estimation in fast time-varying OFDM systems

Progressive iterative channel estimation in fast time-varying OFDM systems

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