NDLI: Response Vector Constrained Robust LCMV Beamforming Based on Semidefinite Programming

Content Provider	IEEE Xplore Digital Library
Author	Jingwei Xu Guisheng Liao Shengqi Zhu Lei Huang
Copyright Year	1991
Abstract	Although linearly constrained minimum variance (LCMV) beamforming is robust against imprecise target information, it usually leads to relatively high sidelobe and distorted mainlobe which would induce a high false alarm probability. To circumvent this problem, this work devises a novel robust LCMV beamforming approach by utilizing response vector optimization. It intends to find the optimal response vector in lieu of the all-one response vector in traditional LCMV beamformer. The proposed robust beamformer is first formulated as a nonconvex quadratically constrained quadratic programming problem, and then transformed into a semidefinite programming problem which can be efficiently and exactly solved. The proposed beamformer not only improves the performance in terms of signal-to-interference-plus-noise ratio substantially, but also possesses low sidelobe and well-maintained mainlobe. Moreover, since the response vector is quite small in size, the complexity of calculating the optimal response vector is negligible. Additionally, the proposed beamformer is also extended to two-dimensional space-time adaptive processing. Simulation results are presented to demonstrate the superiority of the proposed approach.
Sponsorship	IEEE Signal Processing Society
Starting Page	5720
Ending Page	5732
Page Count	13
File Size	2473321
File Format	PDF
ISSN	1053587X
Volume Number	63
Issue Number	21
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Robustness Array signal processing Arrays Clutter Radar Degradation semidefinite programming Robust adaptive beamforming linearly constrained minimum variance beamformer response vector optimization quadratically constrained quadratic programming
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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