对相位编码体制雷达的导前假目标干扰

基于间歇采样收发干扰体制，针对采用相位编码信号的雷达系统，提出了部分接收、预测转发，形成导前假目标群的新型干扰方法。在介绍间歇采样转发的基本原理后，分析了相位编码信号匹配滤波器的群延迟特性，从群延迟的角度分析了移频转发干扰和间歇采样转发干扰不能形成导前假目标的理论原因。在此基础上，针对相位编码M序列的编码特点，提出了一种基于间歇采样的预测转发干扰方法，并分析了对转发功率的要求。理论分析和仿真结果表明，该方法可以形成导前距离不同的假目标群，而且干扰功率要求低，是一种极具潜力的新型干扰方法。

Preceded False Targets Jamming Against Phase-Coded Radars

Based on an Intermittent Sampling Repeater Jamming (ISRJ) system, a novel jamming approach for forming precede false targets is presented for the phase coded radar system with partial receiving and predictive repeater. After the principle of ISRJ is expounded, the group delay characteristics of phase coded match filter are analyzed to explain why shift frequency repeater jamming and ISRJ can’t form precede false targets. On this basis, according to the characteristics of M series, a predictive repeater jamming method is proposed. Then the requirement for repeater power is analyzed. Theoretical analysis and simulation results show that the new jamming method can form precede false targets and does not have rigid requirement for power. It shows the method has potential value in practice.