机载火控雷达仿真器目标探测功能建模与仿真

Modeling and Simulation of Target Detection of Airborne Fire-control Radar

针对一定的气象条件、电磁环境和地理环境,分别对雷达接收机噪声、回波信号、电磁干扰建立数学模型,重点模拟机载火控雷达完成目标自动探测的方法。根据雷达目标回波功率,分别求取无干扰和施加干扰环境下目标的信噪比,进而求出探测概率。通过比较[0,1]区间上产生的均匀分布随机数与探测概率,判定雷达是否发现目标。

In the simulator of airborne acquisition sensors to aero target,fire-control radar simulator,flight simulator,photo-sensor simulator,virtual cockpit,a distributed interactive simulation system is constructed.Target detection is an importing issue in the design of radar simulator.In this paper,the models of the receiver noise,echo power,jamming power under the conditions of special weather,electromagnetic environment are built,and the method for target detection is primarily addressed.Considering the jamming condition,the SN（C）R is calculated respectively based on the echo power,then the probability of detection is obtained.By using the method of producing a random variable of uniform distribution in the interval ,whether targets are detected or not can be judged.This paper presents the simulation result in the context of complex environment,and also gives the flow sheet of simulating process.