Open Access

A Robust Capon Beamformer against Uncertainty of Nominal Steering Vector

EURASIP Journal on Advances in Signal Processing20062006:062327

https://doi.org/10.1155/ASP/2006/62327

Received: 21 April 2005

Accepted: 21 October 2005

Published: 2 March 2006

Abstract

A robust Capon beamformer (RCB) against the uncertainty of nominal array steering vector (ASV) is formulated in this paper. The RCB, which can be categorized as diagonal loading approach, is obtained by maximizing the output power of the standard Capon beamformer (SCB) subject to an uncertainty constraint on the nominal ASV. The bound of its output signal-to-interference-plus-noise ratio (SINR) is also derived. Simulation results show that the proposed RCB is robust to arbitrary ASV error within the uncertainty set.

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Authors’ Affiliations

(1)
Center for Signal Processing, Nanyang Technological University
(2)
School of Electrical and Electronic Engineering, Nanyang Technological University

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Copyright

© Yu and Er 2006