摘要
针对弹载宽带相控阵单脉冲雷达体制以及强海杂波背景,提出了一种基于通道级STAP与ATBF的杂波抑制、目标检测与角度测量方法。该方法交替使用两种发射方向图,首先采用常规方向图形成发射波束,利用和通道与俯仰差通道输出的距离-多普勒图像进行自适应杂波对消与目标检测;然后根据目标单元处的对消因子获得等效的接收方向图,在需要抑制的杂波方向形成零点,根据收发互易原理将其转换为修正的发射方向图;最后按修正的方向图计算各阵元的加权因子,形成发射波束,采用常规的单脉冲方式测量目标角度。理论分析及仿真结果表明:该方法能有效抑制杂波及移位角闪烁、改善目标角度的测量精度,且运算量低、易于实现。
A novel method of clutter suppression, target detection and angle measurement based on channel-level STAP and ATBF is presented for wideband phased array mono-pulse radar with application in strong sea clutter background. In the method, two kinds of transmitting pattern are used alternatively. Firstly, transmitting beam of conventional pattern is formed, and the output range-Doppler images of sum channel and elevation difference channel are used for adaptive clutter cancellation and target detection. Then the cancellation factor of the target cell is used to obtain the equivalent receiving pattern which is null-formed at the direction of clutter to be suppressed, and the receiving pattern is conversed to the modi- fied transmitting pattern according to the transceiver reciprocity principle. Finally, the weight factor of each array element is computed to form the transmitting beam according to the modified pattern, and target angles are measured according to the conventional mono-pulse mode. Theoretical analysis and simulation results show that the method has low computational complexity and good performance in clutter suppression, mitigated glint suppression and target angle measurement.
出处
《信号处理》
CSCD
北大核心
2016年第9期1108-1116,共9页
Journal of Signal Processing
关键词
相控阵
单脉冲雷达
空时自适应处理
自适应波束形成
目标检测
高距离分辨
phased array
mono-pulse radar
space time adaptive processing
adaptive beam-forming
target detection
high range resolution
