基于多初级假设的FM广播外辐射源雷达网航迹起始算法  

A Track Initiation Method for FM-based Passive Radar Network Based on Multiple Elementary Hypotheses

作　　者：胡越洋 易建新[1] 万显荣[1] 程丰[1] 徐苏霖 HU Yueyang;YI Jianxin;WAN Xianrong;CHENG Feng;XU Sulin(School of Electronic Information,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电子信息学院,武汉430072

出　　处：《雷达学报（中英文）》2024年第3期601-612,共12页Journal of Radars

基　　金：国家自然科学基金(61931015,62071335,62250024);湖北省自然科学基金创新群体(2021CFA002);中央高校自主科研项目(2042022dx0001)。

摘　　要：基于调频(FM)广播信号的外辐射源雷达有着检测概率低、虚警率高、量测精度差的特点,这给组网目标跟踪带来了极大挑战。一方面,较高的虚警率使计算量增加,组网算法的实时性受到考验;另一方面,检测概率低、方位角精度差造成冗余信息缺乏,量测关联与航迹起始变得困难。为解决这些问题,该文提出初级假设点和初级假设航迹的概念,以及基于此概念的FM广播外辐射源雷达网航迹起始算法。首先构造可能的低维关联假设,并解算出与其对应的初级假设点;随后关联不同时刻的初级假设点,形成多条可能的初级假设航迹;最后联合多场雷达网数据进行假设航迹判决,真实目标对应的初级假设航迹会得到确认,错误关联导致的虚假初级假设航迹会被剔除。相比于已有算法,所提算法有着更低的计算量,更快的航迹起始速度,仿真与实测结果均验证了所提算法的有效性。Passive radars based on FM radio signals have low detection probability,high false alarm rates and poor accuracy,presenting considerable challenges to target tracking in radar networks.Moreover,a high false alarm rate increases the computational burden and puts forward high requirements for the real-time performance of networking algorithms.In addition,low detection probability and poor azimuth accuracy result in a lack of redundant information,making measurement association and track initiation challenging.To address these issues,this paper proposes an FM-based passive radar network based on the concepts of elementary hypothesis points and elementary hypothesis track,as well as a track initiation algorithm.First,we construct possible low-dimensional association hypotheses and solve for their corresponding elementary hypothesis points.Subsequently,we associate elementary hypothesis points from different frames to form multiple possible elementary hypothesis tracks.Finally,by combining multi-frame radar network data for hypothesis track judgment,we confirm the elementary hypothesis tracks corresponding to the real targets,and eliminate the false elementary hypothesis tracks caused by incorrect associations.Result reveal that the proposed algorithm has lower computational complexity and faster track initiation speed than existing algorithms.Moreover,we verified the effectiveness of the proposed algorithm using simulation and experimental results.

关 键 词：FM广播外辐射源雷达 初级假设 航迹起始 雷达网信息融合 

分 类 号：TN953[电子电信—信号与信息处理]