针对压制干扰的存在性检测问题，提出了一种适用于脉压雷达的基于FRFT域峰值特性的压制干扰检测算法。首先，从完整的雷达抗干扰系统角度考虑，提出了将压制干扰存在性检测与目标检测、干扰分类相结合的总体思路；其次，在充分分析FRFT域LFM信号和压制干扰信号峰值特性差异的基础上，选取回波信号在FRFT域的峰值阶次作为检测算法特征参数；然后，采用序贯判决算法对多段回波信号在FRFT域的峰值阶次进行判别，从而完成压制干扰的存在性检测。最后，通过仿真实验验证了算法的有效性。

Aiming at the existence detection problem of suppression interference, a suppression interference detection algorithm based on Fractional Fourier Transform (FRFT) domain peak characteristic is proposed for pulse-compression radar. First, from the perspective of complete radar anti-jamming system, the general idea of combining the existence detection of suppression interference with target detection and interference classification is put forward.Secondly, based on the analysis of the difference between the peak characteristics of the FRFT domain LFM signals and the suppression interference signals, the peak order of the echo signal in the FRFT domain is selected as the characteristic parameter. Then, the sequential decision algorithm is used to determine the peak order of the multi-stage echo signal in the FRFT domain, thus to complete the existence detection of suppression interference. Finally, the effectiveness of the proposed algorithm is verified by simulation experiments.