A robust capon beamformer against uncertainty of nominal steering vector

Abstract

A robust Capon beamformer (RCB) against the uncertainty of nominalarray steering vector (ASV) is formulated in this paper. The RCB,which can be categorized as diagonal loading approach, is obtainedby maximizing the output power of the standard Capon beamformer(SCB) subject to an uncertainty constraint on the nominal ASV. Thebound of its output signal-to-interference-plus-noise ratio (SINR)is also derived. Simulation results show that the proposed RCB isrobust to arbitrary ASV error within the uncertainty set. Copyright © 2006 Hindawi Publishing Corporation. All rights reserved.