Paper Info
Title
Robust adaptive beamforming method using principal eigenpairs with modification of PASTd
Abstract
Adaptive arrays suffer from performance degradation in the presence of steering vector errors. The doubly constrained robust Capon beamformer (DCRCB) can deal with the problem, utilizing all the eigenvalues and eigenvectors of the covariance matrix, which leads to high computational complexity. This paper presents a robust beamforming method which is computationally efficient, exploiting principal eigenpairs only. The eigenpairs can be estimated based on the projection approximation subspace tracking with deflation (PASTd). The original PASTd algorithm, which does not provide orthonormal eigenvectors in general, is modified so that the orthonormalization of eigenvectors can be efficiently made using the structure of the modified algorithm. The proposed beamforming method significantly reduces the computational load, particularly when the number of the directional signals is much less than that of sensor elements, and substantially has the same performance as the conventional one utilizing all the eigenpairs.
Year
DOI
Venue
2013
10.1016/j.dsp.2012.08.014
Digital Signal Processing
Keywords
DocType
Volume
computational load,robust beamforming method,proposed beamforming method,robust capon beamformer,modified algorithm,performance degradation,original pastd algorithm,principal eigenpairs,high computational complexity,orthonormal eigenvectors,robust adaptive
Journal
23
Issue
ISSN
Citations 
2
1051-2004
7
PageRank 
References 
Authors
0.59
8
1
Name
Order
Citations
PageRank
Yang-Ho Choi1336.66