Robust Adaptive LCMV Beamformer Based On An Iterative Suboptimal Solution

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dc.contributor.authorGuo, Xiansheng
dc.contributor.authorChu, Lei
dc.contributor.authorLi, Baocang
dc.coverage.issue2cs
dc.coverage.volume24cs
dc.date.accessioned2015-06-29T12:55:44Z
dc.date.available2015-06-29T12:55:44Z
dc.date.issued2015-06cs
dc.description.abstractThe main drawback of closed-form solution of linearly constrained minimum variance (CF-LCMV) beamformer is the dilemma of acquiring long observation time for stable covariance matrix estimates and short observation time to track dynamic behavior of targets, leading to poor performance including low signal-noise-ratio (SNR), low jammer-to-noise ratios (JNRs) and small number of snapshots. Additionally, CF-LCMV suffers from heavy computational burden which mainly comes from two matrix inverse operations for computing the optimal weight vector. In this paper, we derive a low-complexity Robust Adaptive LCMV beamformer based on an Iterative Suboptimal solution (RAIS-LCMV) using conjugate gradient (CG) optimization method. The merit of our proposed method is threefold. Firstly, RAIS-LCMV beamformer can reduce the complexity of CF-LCMV remarkably. Secondly, RAIS-LCMV beamformer can adjust output adaptively based on measurement and its convergence speed is comparable. Finally, RAIS-LCMV algorithm has robust performance against low SNR, JNRs, and small number of snapshots. Simulation results demonstrate the superiority of our proposed algorithms.en
dc.formattextcs
dc.format.extent572-582cs
dc.format.mimetypeapplication/pdfen
dc.identifier.citationRadioengineering. 2015 vol. 24, č. 2, s. 572-582. ISSN 1210-2512cs
dc.identifier.doi10.13164/re.2015.0572en
dc.identifier.issn1210-2512
dc.identifier.urihttp://hdl.handle.net/11012/41860
dc.language.isoencs
dc.publisherSpolečnost pro radioelektronické inženýrstvícs
dc.relation.ispartofRadioengineeringcs
dc.relation.urihttp://www.radioeng.cz/fulltexts/2015/15_02_0572_0582.pdfcs
dc.rightsCreative Commons Attribution 3.0 Unported Licenseen
dc.rights.accessopenAccessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en
dc.subjectRobust adaptive beamformeren
dc.subjectLCMVen
dc.subjectiterative suboptimal solutionen
dc.subjectcomputational analysisen
dc.titleRobust Adaptive LCMV Beamformer Based On An Iterative Suboptimal Solutionen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.affiliatedInstitution.facultyFakulta eletrotechniky a komunikačních technologiícs
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