干扰机通过截获并间歇转发雷达发射信号，可以快速生成间歇采样转发干扰（Interrupted Sampling Repeater Jamming，ISRJ），当真、假目标在时域高度重合时，现有雷达干扰抑制方法会导致干扰信号存在较大残余。针对这一问题，本文提出了一种基于脉内频率捷变与复数变分模态分解（Complex Variational Mode Decomposition, CVMD）的间歇采样转发干扰抑制方法。具体而言，首先设计非线性拉伸函数来提取回波中被干扰信号段，随后对被干扰片段进行CVMD分解以实现不同频率成分的自适应分离，并利用干扰脉内载频滞后性实现目标与干扰信号的分选，最后通过分段脉压技术完成目标能量积累。仿真结果表明，所提方法能够有效对抗不同形式的ISRJ，在高干信比情况下仍能保持稳定的抑制性能，有效提升雷达的干扰对抗能力。

By intercepting and intermittently forwarding radar-transmitted signals, jammers can rapidly generate Interrupted Sampling Repeater Jamming (ISRJ). When true and false targets are highly overlapped in the time domain, existing radar jamming suppression methods tend to result in significant residual interference signals. To address this issue, this paper proposes a jamming suppression method based on frequency-agile waveforms and Complex Variational Mode Decomposition (CVMD). Specifically, a nonlinear stretching function is first designed according to the energy distribution of jamming in the echo, enabling the extraction of jamming echo segments, which are then then decomposed via CVMD to achieve adaptive separation of different frequency components. The separation of target and jamming signals is realized by exploiting the intra-pulse carrier frequency offset characteristic of the jamming. Finally, target energy integration is accomplished through segmented pulse compression. Simulation results demonstrate that the proposed method effectively counteracts various forms of ISRJ, maintains stable suppression performance even under high jamming-to-signal ratio conditions, and significantly enhances radar jamming resistance.