Journal
IEEE TRANSACTIONS ON SIGNAL PROCESSING
Volume 60, Issue 11, Pages 5845-5856Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSP.2012.2212889
Keywords
Beampattern shaping; coherent robust Capon beamforming; linearly constrained minimum variance beamforming; mainbeam constraints; null-pattern constraints; robust adaptive beamforming; robust Capon beamforming
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In this paper, a novel linearly constrained robust Capon beamformer (LCRCB) framework is proposed. In the LCRCB, linear constraints can be used, e.g., for beampattern control and ellipsoidal array steering vector sets can be exploited, using robust Capon beamforming techniques, e.g., to allow for arbitrary array steering vector errors, such as those arising from calibration errors. The LCRCB is applicable to arbitrary array geometries and can be computed efficiently. For the limiting case that the ellipsoid is a point, we show that the LCRCB coincides with a linearly constrained minimum variance beamformer. To show the utility of the LCRCB, mainbeam and null-pattern control examples are included.
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