一种同时全极化雷达发射波形和接收滤波器联合设计的抗间歇采样转发干扰方法

An anti-jamming method against interrupted sampling repeater jamming based on designing transmitted waveforms and receiving filters for simultaneous polarimetric radar

针对间歇采样干扰生成的高逼真虚假目标串能将真实目标回波掩盖,致使雷达目标检测功能失效的问题,本文以降低脉冲压缩后的干扰能量为出发点,首次提出了在同时全极化雷达体制下,基于正交发射波形和接收滤波器联合设计的间歇采样干扰抑制方法.文中首先建立了以脉冲压缩输出信号旁瓣能量为指标的目标函数;其次,以抑制间歇采样干扰为目的,根据发射波形的恒模约束等条件,建立了同时全极化雷达体制下发射波形与接收滤波器的联合优化模型;最后,通过交替迭代优化方法对该模型求解,继而实现对间歇采样干扰的抑制.数字仿真和半实物硬件系统测试结果表明,本文提出的方法能有效抑制间歇采样干扰,提升全极化雷达在复杂电磁环境下的抗干扰能力.

The realistic false targets caused by the interrupted sampling repeater jamming can obscure the real target echo, resulting in radar target detection failure. In this paper, based on reducing the energy of the interference signal after the pulse compression operation, a method is first proposed to suppress the interrupted sampling repeater jamming by jointly designing the transmitted waveforms and receiving filters for the simultaneous polarimetric radar. The joint design optimization problem is formulated by minimizing the energy of the sidelobes of the pulse compression output signal with the constant modulus constraint. An alternately optimized iterative algorithm is proposed to optimize the transmitted waveforms and receiving filters, respectively. Numerical and indoor experimental results are presented to show the effectiveness of the proposed method to suppress the interrupted sampling repeater jamming.