Presentation Information
[B-1C-40]Evaluation of Element Position Error Robustness in DOA Estimation of Closely-Spaced Waves
◎Ryo Ijichi1, Steven Wandale1, Koichi Ichige1, Shota Kunikata2, Ryo Saito2, Katsuhisa Kashiwagi2, Takahiro Kinoshita3 (1. Yokohama National Univ., 2. Murata Manufacturing Co., Ltd., 3. Hokusei Gakuen Univ.)
Keywords:
DOA estimation,Element position error,Robustness,Annihilating filter method,Closely-spaced waves
Direction-of-arrival (DOA) estimation is a fundamental technique in radar, wireless communications, and related fields, where high-resolution methods such as the MUSIC algorithm and the Annihilating Filter (AF) method are widely used. These methods assume that the array geometry is known; however, in practical systems, element position errors arise from manufacturing and installation tolerances, and their effect is not negligible. Although MUSIC and AF achieve high estimation accuracy, the effect of element position errors on DOA estimation accuracy has received little attention. The authors have previously examined the estimation accuracy of the AF method for DOA estimation, but its robustness was not investigated. In this paper, focusing on DOA estimation of closely-spaced waves, we model element position errors and compare and evaluate the robustness of the MUSIC, spatial-smoothing MUSIC (SS-MUSIC), and AF methods.