基于空间相关电离层模型的天波雷达目标跟踪

天波超视距雷达(简称天波雷达)(OTHR)通过电离层反射效应可实现对多种高价值目标的远程预警.天波雷达目标跟踪算法设计中,电离层建模对其跟踪性能至关重要.该文考虑现实中电离层的空间相关性,提出一种基于高斯马尔可夫随机场(GMRF)的电离层虚高模型,以及相应的天波雷达多路径目标跟踪方法.该方法在贝叶斯估计的基础上,对多路...

Over-The-Horizon Radar Target Tracking Based on Spatial Correlation Ionosphere Model

Skywave Over-The-Horizon Radar (OTHR) relies on the earth’s ionosphere which reflects its electromagnetic waves to achieve long range early warning of a variety of high-value targets. The model of ionosphere is the key factor for OTHR target tracking. Considering the spatial correlation of the Virtual Ionospheric Height (VIH) in different geographic locations, a new VIH model, represented by a Gaussian Markov Random Field (GMRF) and a new multipath target tracking method are proposed. Based on Bayesian estimation, the new method estimates jointly target state and VIHs under multipath and clutter environment. Given the limited measurements of the ionospheric subregions, the VIHs of the unmeasured subregions are inferred based on the GMRF model, thereby the precision of VIHs and the accuracy of the target tracking are improved. Numerical simulation shows that the accuracy of OTHR target tracking is improved.