Research On Target Active Detection Technology Of Network Radar Countermeasure System

Network Radar Countermeasure System is a new radar countermeasure system with distributed network station distribution.It connects multiple transmitting stations,receiving stations and central stations deployed in different places into an organic whole through specified network protocols and devices.It can complete target detection,intelligence collection,identification and tracking,interference suppression,fire guidance and other functions.This paper mainly studies the target active detection technology of network radar countermeasure system.The main work and innovation include the following aspects:(1)This paper studies the signal model of network radar countermeasure system,and analyzed the signal processing flow of networked radar countermeasure system.The deduction process from distributed target model to ideal point source target model is given.Also the signal model of networked radar countermeasure system is constructed.On this basis,the diversity processing gain and radar anti-interception performance of networked radar countermeasure system are studied.(2)The target detection performance of networked radar countermeasure system under different conditions is studied.When the RCS scattering coefficients of targets are independent of each other,the chi-square distribution is used to describe the statistics.When the RCS scattering coefficients of targets are correlated,the gamma distribution is used to describe the statistical distribution of RCS scattering coefficients.The detection performances of phased array radar,multistatic radar and network radar countermeasure system are compared and analyzed.The performance of coherent gain and diversity gain,centralized data processing and distributed data processing in detection is further elaborated.(3)The application and advantages of moving target display technology in network radar countermeasure system and the factors affecting the effectiveness of moving target display are studied,and a modified method of target coordinate representation is proposed to improve the sudden change of angle when crossing radar coordinate quadrant.The feasibility of this modified method is verified by simulation.(4)The influence of system configuration model on detection performance is studied.In view of the low power of the transmitting station of the network radar countermeasure system,the coverage and detection performance under three basic configurations,i.e.linear,circular and regional configurations,are studied,and some suggestions for the configuration method are put forward.