Cross-ambiguity function domain multipath channel parameter estimation

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 integ...

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Published in:	Digital signal processing Vol. 22; no. 2; pp. 275 - 287
Main Authors:	Guldogan, Mehmet Burak, Arikan, Orhan
Format:	Journal Article
Language:	English
Published:	Elsevier Inc 01.03.2012
Subjects:	Antennas Arrays Channel estimation Channels Cross-ambiguity function (CAF) Direction-of-arrival (DOA) Doppler effect Multipath channels Music Signal classification Space-alternating generalized expectation-maximization (SAGE) algorithm TECHNOLOGY TEKNIKVETENSKAP Time delay Waveforms Direction-of-arrival (DOA) Cross-ambiguity function (CAF) Space-alternating generalized expectation–maximization (SAGE) algorithm Channel estimation Multipath channels
ISSN:	1051-2004, 1095-4333, 1095-4333
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Abstract	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 Cramér–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.
AbstractList	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 Cramér–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. 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 Cramer-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.
Author	Arikan, Orhan Guldogan, Mehmet Burak
Author_xml	– sequence: 1 givenname: Mehmet Burak surname: Guldogan fullname: Guldogan, Mehmet Burak email: bguldogan@isy.liu.se organization: Department of Electrical Engineering, Linköping University, Linköping 58183, Sweden – sequence: 2 givenname: Orhan surname: Arikan fullname: Arikan, Orhan organization: Department of Electrical and Electronics Engineering, Bilkent University, Bilkent, Ankara TR-06800, Turkey
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Keywords	Direction-of-arrival (DOA) Cross-ambiguity function (CAF) Space-alternating generalized expectation–maximization (SAGE) algorithm Channel estimation Multipath channels
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Snippet	A new array signal processing technique is proposed to estimate the direction-of-arrivals (DOAs), time delays, Doppler shifts and amplitudes of a known...
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SubjectTerms	Antennas Arrays Channel estimation Channels Cross-ambiguity function (CAF) Direction-of-arrival (DOA) Doppler effect Multipath channels Music Signal classification Space-alternating generalized expectation-maximization (SAGE) algorithm TECHNOLOGY TEKNIKVETENSKAP Time delay Waveforms
Title	Cross-ambiguity function domain multipath channel parameter estimation
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