Cross-ambiguity function domain multipath channel parameter estimation

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• 作者：Mehmet Burak Guldogan^a ; ^{bguldogan@isy.liu.se}  ; [Author Vitae] ; Orhan Arikan^b  ; [Author Vitae]
• 关键词：Direction-of-arrival (DOA) ; Multipath channels ; Channel estimation ; Cross-ambiguity function (CAF) ; Space-alternating generalized expectation&ndash ; maximization (SAGE) algorithm
• 刊名：Digital Signal Processing
• 出版年：2012
• 期刊代码：128_10512004
• 类别：cp
• 出版时间：March, 2012
• 卷：22
• 期：2
• 页码：275-287
• 文件大小：560 K

摘要

A new array signal processing technique is proposed to estimate the direction-of-arrivals (DOAs), time delays, Doppler shifts and amplitudes of a known waveform impinging on an array of antennas from several distinct paths. The proposed technique detects the presence of multipath components by integrating cross-ambiguity functions (CAF) of array outputs, hence, it is called as the cross-ambiguity function direction finding (CAF-DF). The performance of the CAF-DF technique is compared with the space-alternating generalized expectation-maximization (SAGE) and the multiple signal classification (MUSIC) techniques as well as the Cram茅r-Rao lower bound. The CAF-DF technique is found to be superior in terms of root-mean-squared-error (rMSE) to the SAGE and MUSIC techniques.