Summary
International Symposium on Antennas and Propagation
2009
Session Number:3E3
Session:
Number:3E3-2
On the Accuracy of DOA Estimation via Blind Calibration
Ryuya Arita, Koichi Ichige, Hiroyuki Arai,
pp.1099-1102
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
Direction-Of-Arrival (DOA) estimation is one of significant techniques for high-speed mobile communication to know wave propagation environment [1]. "Superresolution" DOA estimation methods such as MUSIC [2], and ESPRIT [3] methods are paid so much attention because of their high accuracy in estimating DOAs of incident signals. The accuracy of those DOA estimation methods is often deteriorated by the mutual coupling among array elements. Therefore we have to calibrate array elements in order to compensate the mutual coupling in advance but it often takes time and is difficult to accurately calibrate antenna elements. To resolve this problem, the MUSIC-based DOA estimation method that compensating the influence of mutual coupling without actual calibration ? called "Blind Calibration" ? has been proposed [4]. This method can hide mutual coupling coefficients by installing some virtual elements around Uniform Linear Array (ULA). In this paper, we expand the formulation of this method to correspond to URA configuration, and confirm that the blind calibration can work for URA. Also we verify the DOA estimation accuracy of the blind calibration for ULA through the experiment in anechoic chamber.