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Robust beamforming for coherent signals based on spatial smoothing technique

Zhang, L (2012) Robust beamforming for coherent signals based on spatial smoothing technique Signal Processing, 92 (11). pp. 2747-2758.

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Abstract

Spatial-smoothing provides an elegant solution for both beamforming and direction of arrival (DOA) estimation in a coherent signal environment. However, this technique is based on special array structures such as uniform linear arrays (ULAs) and its performance will degrade when the special structure is destroyed by all kinds of array errors in practice. In this paper, the robust beamforming problem for coherent signals is addressed and a forward-only (FO) beamformer is proposed first based on worst-case optimization by considering both the steering vector and the correlation matrix errors. By treating the steering vector error differently, two solutions are derived, which are then extended to the forward–backward (FB) case with improved performance. By introducing a preprocessing matrix, real-valued closed-form solutions are then presented with the same performance as in the FB case, but with much lower computational complexity.

Item Type: Article
Subjects : Electronic Engineering
Authors :
NameEmailORCID
Zhang, Llei.zhang@surrey.ac.ukUNSPECIFIED
Date : November 2012
Identification Number : https://doi.org/10.1016/j.sigpro.2012.05.008
Copyright Disclaimer : © 2012 Elsevier B.V. All rights reserved
Uncontrolled Keywords : Robust beamforming, Generalized eigenvector problem, Coherent signals, Forward backward, Real-valued, Spatial smoothing
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:58
Last Modified : 18 May 2017 12:54
URI: http://epubs.surrey.ac.uk/id/eprint/841001

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