相控阵PD雷达目标检测的实时空间滤波算法

Real-time Spatial-filtering Algorithm for Phased-array PD Radar Target Detection

针对弹载相控阵PD制导雷达的目标搜索与检测应用,建立了回波信号模型以及基于子阵的信号处理模型;提出了一种旁瓣杂波区位置估计以及在旁瓣杂波区检测目标的实时空间滤波新算法。该算法采用方位、俯仰方向上的分步降维处理,以一定的滤波性能损失换取运算开销的显著降低;通过理论分析比较了该算法与常规最优空间滤波算法的运算复杂度;通过计算机仿真实验比较了该算法与常规PD雷达的信号积累算法、相控阵PD雷达的最优空间滤波算法的杂波抑制性能。

For application of missile-borne phased-array pulse-Doppler radar target ~acquisition and detection, mathematical model of return signal and its processing based on sub-array is established. Then a novel aIgorithm of side-lobe clutter area estimation and spatial filtering for target detection in such area is presented. The algorithm evidently lowers the computation by using reduction of dimensionality in azimuth and pitch direction with reasonable losses in performance of clutter-suppression. The computation complexity of the algorithm is compared with the conventional optimal spatial filtering algorithm by theoretical analysis. The performance of clutter-suppression of the algorithm is compared with the signal integration algorithm of traditional PD radar and the optimal spatial filtering algorithm of phased-array PD radar by computer simulation.