| Title |
Height Constrained Gaussian Filter for Sea-Skimming Target Tracking |
| Authors |
황익호(Ick-Ho Whang) ; 강지훈(Jihoon Kang) ; 안지훈(Ji-Hoon An) ; 조형준(Hyeong-Jun Cho) ; 박상규(Sang-Gyu Park) ; 나원상(Won-Sang Ra) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.11.1989 |
| Keywords |
Multipath Error; Sea-Skimming Target Tracking; Equivalent Height Measurement; Positive Height Constrained Gaussian Filter |
| Abstract |
Modern anti-ship missiles often employ low-altitude sea-skimming tactics to improve their survivability against naval defense systems. However, radar returns from such low-flying missiles are notorious for exhibiting severe fluctuations due to the multipath effect. This phenomenon significantly impairs radar systems' ability to accurately measure angles - especially in the elevation channel - resulting in critically poor performance. These degraded pitch measurements pose a substantial challenge for ship defense systems attempting to counter sea-skimming threats. In this paper, we investigate the multipath effect and propose a simplified model for characterizing its impact on radar measurements. Furthermore, by constraining the positive height condition to pitch radar measurements, we introduce novel design methodologies for height-tracking filters tailored to sea-skimming missile scenarios. Simulation studies in various conditions demonstrate that the proposed filters can reliably track targets, even under conditions where pitch measurements are heavily degraded by multipath interference. |