| Title |
An Error Mitigation Method for TDOA-based Localization in Multipath Environments |
| Authors |
문형주(Hyeongju Mun) ; 정성훈(Seonghun Jeong) ; 이명식(Myung-Sik Lee) ; 박진오(Jin-Oh Park) ; 채주희(Ju-Hui Chae) ; 길기성(Gi-Seong Gil) ; 김진우(Jin-Woo Kim) ; 공경보(Kyeongbo Kong) |
| Keywords |
Localization; TDOA; Electronic warfare; Raster condition; Density map |
| Abstract |
Time Difference of Arrival (TDOA)-based position estimation is an effective technique for estimating the location of a transmitter in electronic warfare environments by using the arrival-time differences of received signals. However, in multipath environments, multiple reflected paths can introduce misleading information into TDOA measurements, which significantly reduces the accuracy of position estimation. To mitigate this issue, raster condition?based approaches have been proposed, but ambiguity still remains. To address the structural limitations of conventional raster condition methods, this paper presents an approach that incorporates TDOA reliability, derived from raster condition results, as weighting factors in a position-based density map. The proposed method constructs an updated total density map by applying reliability values corresponding to each TDOA estimate to the conventional intersection-based density map. In the post-processing stage, tolerance-based filtering and connected-component filtering are applied to remove low-reliability false intersections, enabling more robust position estimation even under multipath conditions. Simulation results verify the effectiveness of the proposed method, showing improved performance in terms of removing false intersections and enhancing position estimation accuracy compared with raster condition?only techniques. |