频率捷变雷达联合模糊C均值抗间歇采样干扰

间歇采样噪声调制转发干扰是一种兼具压制和欺骗特点的新型有源干扰,是目前雷达抗干扰领域的难点之一.为了提高捷变频雷达对抗噪声调制的间歇采样转发干扰(ISRJ)的能力,该文结合ISRJ时域不连续的特点,提出一种基于频率捷变体制雷达联合模糊C均值(FCM)的抗ISRJ方法.首先,该文设计一种脉内频率编码-脉间频率捷变的雷达发...

Anti-interrupted Sampling Repeater Jamming Method Based on Frequency-agile Radar Joint Fuzzy C-means

Intermittent sampling noise modulation and forward jamming is a novel active jamming method with both suppression and deception characteristics and is a challenge often encountered in radar anti-jamming. To improve the capability of frequency-agile radar to resist noise-modulated Intermittent Sampling Repeater Jamming (ISRJ), we propose an anti-ISRJ method based on frequency-agile radar joint Fuzzy C-Means (FCM). First, we designed a radar-transmitted waveform with intra pulse frequency coding and inter pulse frequency agility. Second, after receiving the echo signal, we obtained the sub pulse signals corresponding to different intra-pulse frequency codes via narrow-band filtering in the frequency domain. Third, we adopted the FCM algorithm to determine the presence of ISRJs in the sub pulses after pulse compression. Finally, we realized the phase-coherent accumulation of inter pulse frequency-hopping waveform using the compressed sensing algorithm. Theoretical analysis and simulation experiments showed that the proposed method can effectively resist ISRJ.