Performance of direction-finding systems with sensor gain and phase uncertainties |
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Authors: | Benjamin Friedlander Anthony J Weiss |
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Institution: | (1) Department of Electrical and Computer Engineering, University of California, 95616 Davis, California, USA;(2) Department of Electrical Engineering, Tel Aviv University, 69978 Tel Aviv, Israel |
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Abstract: | In this paper we study the performance of direction-finding systems which attempt to estimate unknown array parameters (such as sensor gains and phases) in addition to the estimation of the directions of arrival (DOA), as a way of performing array self-calibration. We develop compact closed form expressions for the Cramér-Rao bound associated with the joint estimation of DOAs, gains, phases, and the signal covariance matrix. By evaluating the Cramér-Rao bound for selected cases we gain some insight into the performance of direction-finding systems in the presence of gain and phase uncertainties.This work was supported by the Army Research Office under Contract No. DAAL03-89-C-0007, sponsored by U.S. Army Communications Electronics Command, Center for Signals Warfare. |
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