| Title |
Time Mismatch Compensation and Fusion of Asynchronous Sensor Data for CIWS Radar Tracking Performance Enhancement |
| Authors |
정보영(Boyoung Jung) ; 이윤하(Yunha Lee) ; 나원상(Won-Sang Ra) ; 설권(Kwon Seol) ; 문경빈(Gyeong-Bin Mun) ; 신승용(Seung-Yong Shinark ?) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.12.2299 |
| Keywords |
Closed-in-weappon System; Out-of-sequence Measurement; Time-mismatch Compensation Filter; Sensor Fusion; Multipath Error |
| Abstract |
This paper presents a practical heterogeneous sensor fusion algorithm aimed at enhancing the interception capability of naval close-in weapon systems (CIWSs) against anti-ship missiles. Since sea surface reflection multipath is well known to significantly degrade radar tracking performance, most CIWS sensors incorporate electro-optical (EO) sensors, which are inherently robust to such errors. To effectively synchronize EO sensor data with radar data, a preprocessing filter based on the first-order Pade approximation is designed. This filter estimates the current target elevation from the EO sensor’s time-delayed measurements. The proposed method enables fast-cycle fusion of heterogeneous sensors, ensuring more reliable target tracking even when radar data is biased due to multipath effects. Simulation results using a representative anti-ship missile trajectory demonstrate that the proposed approach outperforms existing fusion methods based on retrodiction. |