双曲调频波形抑制间歇采样转发干扰效果分析

doi:10.12305/j.issn.1001-506X.2021.11.16

摘要/Abstract

摘要：

双曲调频(hyperbolic frequency modulated, HFM)波形具有多普勒不变性, 在宽带雷达对高速目标的成像中具有重要价值。而间歇采样转发干扰(interrupted sampling repeater jamming, ISRJ)作为一种常见的有源干扰, 利用了脉冲压缩雷达的相干特性, 实现了多假目标干扰的效果, 对采用线性调频波形的雷达探测有着极大影响。该文基于对HFM波形和ISRJ的模型分析, 推导出HFM波形参数与ISRJ的效果之间的相关关系; 并经分析表明: HFM波形不仅具有良好的多普勒不变性, 而且较线性调频波形对ISRJ有更好的抑制效果。该结论可为HFM波形抗干扰设计提供理论依据, 数值仿真验证了结论的有效性。

关键词: 双曲调频波形, 间歇采样转发干扰, 抗干扰, 波形设计

Abstract:

Hyperbolic frequency modulated (HFM) is a waveform with the characteristic of Doppler invariance, and it has a high application value in the wideband radar imaging of high-speed targets. Interrupted-sampling repeater jamming (ISRJ), as a common type of radar jamming, can cause multiple false targets jamming by using coherent characteristics of pulse compression radar, which greatly limits the detection of radar with linear frequency modulated waveform. Firstly, the correlation is derived between the effect of ISRJ and the parameters of HFM waveforms based on the model analysis of HFM waveform and ISRJ. Then, the analysis shows that the HFM waveform can not only have the characteristic of Doppler invariance, but also have the effective jamming suppression performance caused by ISRJ compared with linear frequency modulated waveform. The conclusion provides a theoretical basis for the anti-jamming design of HFM waveform, and the numerical simulations verify the effectiveness of the conclusion.

Key words: hyperbolic frequency modulated (HFM) waveform, interrupted sampling repeater jamming (ISRJ), anti-jamming, waveform design

中图分类号:

TN974

张彦, 叶春茂, 鲁耀兵, 陈学斌. 双曲调频波形抑制间歇采样转发干扰效果分析[J]. 系统工程与电子技术, 2021, 43(11): 3169-3176.

Yan ZHANG, Chunmao YE, Yaobing LU, Xuebin CHEN. Hyperbolic frequency modulated waveform for interrupted sampling repeater jamming suppression[J]. Systems Engineering and Electronics, 2021, 43(11): 3169-3176.

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雷达波形及干扰参数	数值
雷达载波频率f_c/GHz	10
发射波形带宽B/GHz	1
发射波形脉宽T_p/ms	1
干扰机采样时长T_pj/μs	2
ISRJ(DF)间歇周期T_rj/μs	4
ISRJ(RF)间歇周期T_rj/μs	6

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