Performance Analysis of MUSIC-Based Jammer DOA Estimation Technique for a Misaligned Antenna Array

• Published in: Journal of Positioning, Navigation, and Timing Vol. 9; no. 1; pp. 7 - 13
• Main Authors: Park, Kwansik, Seo, Jiwon
• Format: Journal Article
• Language: Korean
• Published: 사단법인 항법시스템학회 01.03.2020
• Subjects: 기타공학; DOA estimation; misaligned antenna array; MUSIC algorithm
• ISSN: 2288-8187; 2289-0866
• DOI: 10.11003/JPNT.2020.9.1.7

As a countermeasure against the threat of jamming which can disrupt operation of the Global Positioning System (GPS) receivers, various kinds of technique to estimate the Direction-Of-Arrivals (DOAs) of incoming jamming signals have been widely studied, and among them, the MUltiple SIgnal Classification (MUSIC) algorithm is known to provide very high resolution. However, since the previous studies regarding the MUSIC algorithm does not consider the orientation of each antenna element of antenna arrays, there is a possibility that DOA estimation performance degrades in the case of a misaligned antenna array whose antenna elements are not oriented along the same direction. As an effort to solve this problem, there exists a previous work which presents an MUSIC-based method for DOA estimation. However, the error between the real and measured values of each antenna orientation is not taken into consideration. Therefore, in this paper, the effect of the aforementioned error on the DOA estimation performance in the case of a misaligned antenna array is analyzed by simulations.