基于多电视台的两种无源雷达成像算法

Two algorithms for passive radar imaging based on multiple television stations

基于外辐射源的无源雷达成像是当前新体制雷达的研究热点,给出了利用多个电视台作为外辐射源的直接二维快速傅里叶变换成像算法和极坐标成像算法。建立了多基地无源雷达成像模型,通过理论推导得到目标散射函数和雷达接收信号之间的傅里叶变换对的关系。选取15个电视台信号作为外辐射源进行了仿真实验,分析和比较了两种算法的性能,证实了算法的可行性。

Passive radar imaging using external illuminators as illuminators is a very important research topic in designing of new style radar system, two passive radar imaging algorithms are presented, which is referred to as FFT algorithm and polar coordinates algorithm, both of them use multiple television stations as transmitters. An imaging model of muhistatic passive radar is built, then the relationship between target scattering function and the echo signal is proved to hold as a Fourier transform pair. The imaging simulations are performed using 15 television station signals as the external illuminators. In the end, the performance analysis and comparison demonstrate the feasibility of the two algorithms.