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Mathematical Problems in Engineering
Volume 2014, Article ID 429426, 12 pages
http://dx.doi.org/10.1155/2014/429426
Research Article

Direction Finding with Gain/Phase Errors and Mutual Coupling Errors in the Presence of Auxiliary Sensors

Department of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China

Received 17 January 2014; Accepted 15 February 2014; Published 27 March 2014

Academic Editor: Shen Yin

Copyright © 2014 Weijian Si et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Many classical direction of arrival (DOA) estimation algorithms suffer from sensitivity to array errors. A simple but efficient method is presented for direction finding in the presence of gain and phase errors as well as mutual coupling errors. By applying a group of auxiliary sensors, DOAs and gain and phase coefficients can be simultaneously estimated, and mutual coupling coefficients can also be estimated by utilizing a novel decoupling method. The proposed algorithm does not require iterative operation or any calibration sources or spectral peak searching. Simulation results demonstrate the effectiveness of the proposed method.