基于关联假设树的OTHR多径航迹融合算法  

A Multipath Track Fusion Algorithm Based on Associated Hypotheses Tree for OTHR

作　　者：王德章[1] 高火涛[1] 马文楠 曹婷[1] 

机构地区：[1]武汉大学电子信息学院,武汉430072

出　　处：《现代雷达》2015年第4期35-38,42,共5页Modern Radar

基　　金：国家自然科学基金资助项目(6067201);国防预研基金资助项目;教育部支撑计划基金资助项目

摘　　要：天波超视距雷达利用电离层传播高频信号来探测超远距离的目标,针对电离层的分层结构使得信号在目标与雷达之间的传播存在多种模式,导致单个目标在雷达坐标下对应多条航迹,以及目标跟踪过程中可能存在某种传播模式对应的航迹发生缺失或冗余的现象,文中提出了一种改进的多径航迹融合算法。在目标真实航迹数目未知的情况下,通过建立航迹-路径关联假设树,对各假设树的每一条路径进行评估,得到关联概率并进行加权,最终获得目标地理坐标下的真实航迹。在传播模式完整和非正常状态下进行了仿真分析,证实了该算法具有较强的适用性,在复杂跟踪环境下仍可以获得较好的融合效果,与多假设航迹融合算法相比,该算法具有更好的融合效果。The sky-wave over-the-horizon radar exploits propagation of HF signals to detect targets far in the distance by means of i- onosphere. Several tracks from a single arise in sky-wave over-the-horizon radar tracking, owing to the multipath of propagation in ionosphere between the target and the radar sites, during the process of target tracking, the lack or redundancy of tracks in some modes arises. In this paper, the multipath track fusion algorithm is developed, which all possible path-dependent track-to-target associated hypotheses trees were constructed as the number of targets is unknown, the probability of each feasible track association hypothesis is computed, and fused estimates for target states in ground coordinates are evaluated for each hypothesis. Simulation shows the algorithm has a strong applicability, and tracking in complex environment is still very good fusion effect can be obtained, compared with the multi-hypothesis fusion of muhipath tracks algorithm.

关 键 词：天波超视距雷达 关联假设树 多径航迹融合 

分 类 号：TN958.93[电子电信—信号与信息处理]