时差定位系统对雷达猝发的定位性能分析  

Location Performance Analysis of TDOA Location System Under Radar Burst

作　　者：曾小东[1] ZENG Xiaodong(China Electronics Technology Group Corporation NO.10 Research Institute,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第十研究所,成都610036

出　　处：《电子信息对抗技术》2024年第4期80-86,共7页Electronic Information Warfare Technology

摘　　要：针对雷达暴露时间长,容易被无源定位系统截获和定位的问题,研究了雷达猝发对降低到达时间差(Time Difference of Arrival, TDOA)无源定位系统定位精度的影响。首先,介绍了雷达猝发和TDOA无源定位系统定位原理。然后,建立了雷达猝发对TDOA无源定位系统的影响模型,推导了雷达猝发下的克拉美-罗下界(Cramer-Rao Lower Bound, CRLB)。仿真实验表明,雷达的猝发模式可以有效降低TDOA无源定位系统的定位精度,延长定位时间。当雷达辐射时间为0.5 s,雷达辐射间隔为1 s时,与连续辐射方式相比,定位精度降低了0.26%·R(R为探测距离),定位时间延长了2.5 s。Aiming at the problem that radar is easy to be intercepted and located by passive location system due to its long exposure time,the impact of radar burst mode on reducing the positioning accuracy to time difference of arrival(TDOA)passive detection system is studied.Firstly,the radar burst mode and the TDOA location principle are introduced.Then,the influence model of radar burst mode on the TDOA location system is devised,and the Cramer-Rao lower bound(CRLB)under radar burst mode is deduced.Finally,the simulation experiment demonstrates that the burst mode of radar can effectively reduce the location accuracy and prolong the location time of TDOA location system.When the radar radiation duration is 0.5 s,burst interval is 1 s,the location accuracy is reduced by 0.26%·R(R is the detection distance)and the location time is prolonged by 2.5 s compared with the continuous radiation mode.

关 键 词：雷达 猝发模式 无源定位系统 定位精度 

分 类 号：TN953[电子电信—信号与信息处理]