一种抗 SDIF 分选的脉冲重复间隔参差设计方法

为提高雷达对电子侦察系统抗分选识别能力，从破坏脉冲重复间隔（PRI）分选性能的角度出发，提出了一种雷达信号 PRI 参差设计方法。根据典型的序列差值直方图（SDIF）算法的工作流程，分析了 SDIF 实现 PRI 参差信号分选的关键步骤。合理设计参差 PRI 取值，使其满足一定约束条件，可以破坏正确分选流程，达到分选结果中目标增批的目的。仿真结果表明，该设计方法能有效对抗基于 SDIF 的信号分选策略，可以为雷达信号射频隐身设计提供初步的理论指导。

A Design Method of PRI Stagger Countering the SDIF Sorting Algorithm

To improve the anti-sorting and anti-recognition ability of radars against electronic reconnaissance systems,a design method of PRI stagger for radar signals was proposed based on the idea of destroying the performance of sorting with the pulse repetition interval (PRI).The working process of a typical PRI sorting algorithm,the sequential difference histogram (SDIF)was analyzed,and some critical steps were discussed.It is revealed that,when the staggered PRI values are chosen properly under some contracts,the correct sorting processing can be destroyed,as a result,more than one targets appear in the sorting results.Simulation results show that,the presented design is effective during countering the signal sorting based on the SDIF,therefore it provides a preliminary theoretical guidance for the radio frequency stealth design of radar signals.