摘要
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,对多路径杂波环境下目标状态估计与电离层虚高参数进行联合建模与估计。该方法有效建立起了不同电离层区域之间的相关性,能够在电离层量测有限的情况下推断未量测区域的电离层虚高,改善电离层虚高参数辨识精度,进而提高目标跟踪精度。仿真结果表明基于空间相关性的电离层模型可以有效改善天波雷达目标跟踪性能。
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.
作者
郭振
王增福
兰华
潘泉
GUO Zhen;WANG Zengfu;LAN Hua;PAN Quan(School of Automation,Northwestern Polytechnical University,Xi’an 710129,China;Key Laboratory of Information Fusion Technology,Ministry of Education,Xi’an 710129,China)
出处
《电子与信息学报》
EI
CSCD
北大核心
2022年第1期354-362,共9页
Journal of Electronics & Information Technology
基金
国家自然科学基金(61873211,61790552)
陕西省自然科学基础研究计划(2021JM-067)。
关键词
天波超视距雷达
电离层模型
目标跟踪
高斯马尔可夫随机场
空间相关性
Over-The-Horizon Radar(OTHR)
Ionospheric model
Target tracking
Gaussian Markov Random Field(GMRF)
Spatial correlation
