Summary
International Conference on Emerging Technologies for Communications
2023
Session Number:P2
Session:
Number:P2-18
DOA Estimation of Direct Wave in Multipath Environments Using FFT-FOCUSS with Adaptive Change of Angle Bin Spacing
Kazuya Ota, Nobuyoshi Kikuma, Kunio Sakakibara, Yoshiki Sugimoto,
pp.-
Publication Date:2023/11/29
Online ISSN:2188-5079
Summary:
In the DOA estimation of the first-arrival wave in a multipath environment, the median algorithm with multiple thinned arrays in FFT-FOCUSS was shown to improve the estimation accuracy. This study demonstrates that the scheme of adaptively changing the angle bin spacing further improves the estimation accuracy of the DOA estimation by computer simulation. We propose using a scheme of two-step estimation; we estimate roughly the DOAs in the first step and get more accurate DOAs in the second step. In the first step, the wide-angle bin spacing is used for FOCUSS. In the second step, we apply FOCUSS again with the narrower-angle bin spacing for the areas that are the DOAs estimated in the first step ± wide-angle bin spacing.