| 摘要: |
| 从主动反侦察角度出发，为了提高雷达信号在面临电子战侦察时的抗分选性能，在经典脉冲重复周期(Pulse Repetition Interval,PRI)工作形式上，提出了一种在信号脉冲序列前添加拼接干扰脉冲的方法。信号脉冲序列采用成组参差PRI形式，拼接干扰脉冲是基于Arnold映射的改进二维混沌二值化序列，该混沌序列具有良好的安全性和随机性，可提高分选的难度，破坏分选算法对雷达信号PRI的统计属性。通过CDIF、SDIF和PRI变换算法3个场景的仿真实验探究，和未添加拼接干扰脉冲对比，该方法使得3个场景的分选失败，不能分选出设定的PRI值，达到抗分选效果。 |
| 关键词: 雷达信号抗分选 PRI设计 拼接干扰脉冲 混沌调制 Arnold映射 |
| DOI：10.20079/j.issn.1001-893x.231227006 |
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| 基金项目:基础加强计划技术领域基金(2020-JCJQ-JJ-376) |
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| A Design Method of Anti-sorting Chaotic Modulation PRIBased on Arnold Mapping |
| LIU Guangxia,LI Qi,HAN Zhuangzhi,WEI Yingzhen,YANG Yanduan |
| (1.School of Electronic and Information Engineering,Hebei University of Technology,Tianjin 300401,China;2.Department of Electronic and Optical Engineering,Army Engineering University Shijiazhuang Campus,Shijiazhuang 050003,China) |
| Abstract: |
| From the point of view of active anti-reconnaissance,in order to improve the anti-sorting performance of radar signal in the face of electronic warfare reconnaissance,a method of adding jamming pulses before signal pulse sequence is proposed in the form of pulse repetition interval(PRI).The signal pulse sequence adopts the form of group uneven PRI,and the splicing jamming pulse is an improved two-dimensional chaotic binarization sequence based on Arnold mapping.The chaotic sequence has good security and randomness,improves the difficulty of sorting,and destroys the statistical property of sorting algorithm to radar signal PRI.Through the simulation experiment of CDIF,SDIF and PRI transformation algorithms,and the comparison without adding splicing jamming pulse,the proposed method makes the separation of the three scenes fail,and the set PRI value can not be separated,and the anti-separation effect can be achieved. |
| Key words: radar signal anti-sorting PRI design splicing jamming pulse chaotic modulation Arnold mapping |
