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High accuracy and low complexity adaptive Generalized Sidelobe Cancelers for colored noise scenarios

Kehrle Miranda, Rccardo and C. L. da Costa, João Paulo and Antreich, Felix (2014) High accuracy and low complexity adaptive Generalized Sidelobe Cancelers for colored noise scenarios. Digital Signal Processing (34), pp. 48-55. Elsevier. DOI: 10.1016/j.dsp.2014.07.015 ISSN 1051-2004

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Official URL: http://www.journals.elsevier.com/digital-signal-processing

Abstract

The Generalized Sidelobe Canceler (GSC) is a beamforming scheme which is applied in many fields such as audio, RADAR, SONAR and telecommunications. Recently, the adaptive Reduced Rank GSC (RR-GSC) has been proposed for applications with a large number of sensors. Due to its dimensionality reduction step, the adaptive RR-GSC achieves an enhanced performance in comparison with the standard GSC. However, both standard GSC and RR-GSC have their performance drastically degraded in the presence of colored noise. In this paper, we propose to extend further the GSC and the RR-GSC for colored noise scenarios. As shown in this paper, such improvement in colored noise scenarios can be obtained by incorporating a stochastic or a deterministic prewhitening step in the GSC and RR-GSC algorithms. Since the prewhitening increases the computational complexity, a block-wise reduced rank stochastic gradient GSC beamformer is also proposed. The block-wise step allows only one prewhitening step per block while in the previous schemes one per sample was needed. Another proposed advance in colored noise scenarios is the incorporation of the Vandermonde Invariance Transform (VIT). The VIT works as a pre-beamformer which reduces the interferent power of the undesired sources and the colored noise effect. We show by means of simulations the improved results even for highly correlated scenarios.

Item URL in elib:https://elib.dlr.de/92490/
Document Type:Article
Title:High accuracy and low complexity adaptive Generalized Sidelobe Cancelers for colored noise scenarios
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kehrle Miranda, RccardoLaboratory of Array Signal Processing (LASP), Department of Electrical Engineering, University of Brasília, BrazilUNSPECIFIED
C. L. da Costa, João PauloLaboratory of Array Signal Processing (LASP), Department of Electrical Engineering, University of Brasília, BrazilUNSPECIFIED
Antreich, FelixGerman Aerospace Center (DLR)UNSPECIFIED
Date:30 July 2014
Journal or Publication Title:Digital Signal Processing
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.dsp.2014.07.015
Page Range:pp. 48-55
Publisher:Elsevier
ISSN:1051-2004
Status:Published
Keywords:Beamforming Array processing Colored noise Prewhitening
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Project Dependable Navigation
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Antreich, Felix
Deposited On:26 Nov 2014 10:46
Last Modified:26 Nov 2014 10:46

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