Anti-interrupted sampling repeater jamming method for random pulse repetition interval and intra-pulse frequency agile radar,IET Radar Sonar and Navigation

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Anti-interrupted sampling repeater jamming method for random pulse repetition interval and intra-pulse frequency agile radar
IET Radar Sonar and Navigation ( IF 1.4 ) Pub Date : 2023-09-06 , DOI: 10.1049/rsn2.12465
Tai Guo ₁ , Haihong Zhan ₁ , Xingde Su ₁ , Tao Wang ₁

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Interrupted sampling repeater jamming can produce numerous active false targets with high fidelity, which is a significant challenge for coherent pulse radar. This poses a threat to the effectiveness of anti-jamming technology, such as time-frequency analysis and frequency agility for conventional constant pulse repetition interval (PRI) radar, which will render the radar inoperable to detect and track the actual target. A random PRI and intra-pulse frequency agile radar waveform with low interception properties is proposed, which can effectively restrict the acquisition of radar waveform parameters by the jammer, destroy the coherence of jamming signals, and capture the range-dimensional centroid feature of the echo. Accordingly, a jamming identification method based on the scale constrained Gaussian mixture model and an entity radar target energe recovery algorithm based on the neighbourhood weighted maximum entropy are proposed for target detection. Theoretical analysis and simulation experiments demonstrate the effectiveness of the proposal.

中文翻译：

随机脉冲重复间隔与脉冲内捷变雷达的抗间断采样中继干扰方法

中断采样中继器干扰会产生大量高保真度主动虚假目标，这对相干脉冲雷达来说是一个重大挑战。这对传统恒定脉冲重复间隔（PRI）雷达的时频分析和频率捷变等抗干扰技术的有效性构成威胁，导致雷达无法检测和跟踪实际目标。提出一种低截获特性的随机PRI和脉冲内频率捷变雷达波形，可以有效限制干扰机获取雷达波形参数，破坏干扰信号的相干性，捕获回波的距离维质心特征。据此，针对目标检测提出了基于尺度约束高斯混合模型的干扰识别方法和基于邻域加权最大熵的实体雷达目标能量恢复算法。理论分析和仿真实验验证了该方案的有效性。

更新日期：2023-09-06

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