基于GNSS的前向散射雷达网目标穿越特性研究  

Research on target crossing characteristics of forward scatter radar net based on GNSS

作　　者：郑雨晴 艾小锋[1] 徐志明 赵锋[1] 肖顺平[1] 杨勇[1] ZHENG Yuqing;AI Xiaofeng;XU Zhiming;ZHAO Feng;XIAO Shunping;YANG Yong(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073

出　　处：《系统工程与电子技术》2024年第8期2600-2614,共15页Systems Engineering and Electronics

基　　金：国家自然科学基金(62071475,61890541,61890542)资助课题。

摘　　要：前向散射雷达可通过捕获目标穿越基线时引起的信号扰动实现目标检测,在隐身飞机目标探测方面具有一定潜力,目标穿越特性的研究对信号检测和参数估计具有重要意义。首先构建了基于全球导航卫星系统(global navigation satellite system,GNSS)的前向散射雷达网模型,分析了构成前向散射观测的条件和探测范围。然后,基于前向散射动态信号模型,提出采用时频域统计特征描述目标穿越基线的信号特性。最后,通过仿真分析了目标穿越位置和运动参数对散射信号及其统计特征的影响,揭示了前向散射信号的特征变化规律,对后续提高穿越事件检测概率和参数估计精度具有参考价值。Forward scatter radar can achieve target detection by capturing the signal disturbance caused by the target’s crossing of the baseline.It has certain potential in stealth aircraft’s target detection.The study of target crossing characteristics is of great significance to signal detection and parameter estimation.Firstly,the forward scatter radar net model based on global navigation satellite system(GNSS)is constructed.The conditions and range of forward scattering observation are analyzed.Then,time and frequency domain statistical characteristics are proposed to describe the signal characteristics of the target’s crossing the baseline based on the forward scattering dynamic signal model.Finally,the influence of target crossing position and motion parameters on the scattering signal and its statistical characteristics is analyzed through simulations.The variation law of the forward scattering signal characteristics is revealed,which provides the reference value for subsequent improvement of detection probability of crossing events and parameter estimation accuracy.

关 键 词：双基地雷达 全球导航卫星系统 信号模型 前向散射 统计特性 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]