| 摘要: |
| 为了适应数字干扰设备干扰脉压接收机时对数字脉内相干干扰信号的需求，研究了一
种数字多时延灵巧干扰信号。首先通过数学推导得到多时延数字灵巧干扰信号的数学模型，
并论证该模型可作为循环转发干扰信号、脉内多假目标干扰信号和数字多时延灵巧噪声的统
一数学模型；然后从理论上分析数字多时延灵巧噪声对脉压接收机的欺骗干扰机理和噪
声压制干扰机理；接着通过数字延迟叠加方法和快速卷积算法设计了两种多时延灵巧噪声的
数字实现算法；最后以线性调频脉冲压缩信号为例，对两种算法产生的数字多时延灵巧噪声
通过匹配滤波器前后的时域、频域、时频域特征进行仿真分析，验证了算法有效性同时直观
呈现了数字多时延灵巧噪声对脉压接收机的干扰效果。研究表明多时延灵巧噪声能够有效干
扰脉压接收机，并造成脉内多假目标欺骗干扰效果和高效的噪声压制干扰效果。 |
| 关键词: 雷达对抗 相干干扰 灵巧噪声 多时延干扰信号 卷积调制干
扰信号 |
| DOI： |
|
| 基金项目: |
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| Study on Digital Multidelay Smart Jamming Signal |
| HU Min,LI Guo-lin,ZHANG Ying |
| (Naval Aeronautical and Astronautical University, Yantai 264001，China) |
| Abstract: |
| To meet the requirement of digital jammer for
digital cohere
nt jamming signal when jamming pulse compression receiver, digital multidelay sm
art jamming signal is studied. Firstly,
mathematical model of digital multidelay smart jamming signal which can be used
for representing cycleretransmitting jamming signal, multifalsetarget in s
ingle pulse duration jamming signal and digital multidelay smart noise is
established. Posteriorly, the deceiving and noise jamming mechanism of pulse co
mpression receiver by digital multidelay smart noise is analysed. Then, two algo
rithms of digital multidelay smart noise are presented based on digital delay ac
c
umulation and fast convolution modulation. Finally, taking the LFM signal as exa
mple
, the preandpost matched filter characteristics in time domain, frequ
ency domain and timefrequency domain of digital multidelay smart noise generat
ed by two different algorithms are analysed by simulation. The study shows that
d
igital multidelay smart noise can effectively jam pulse compression receiver and
achieves the effect of
multifalsetarget in single pulse deceiving and noise coverup. |
| Key words: radar countermeasure coherent jamming smart noise multidelay jamming signal convolution modulation
jamming signal |
《电讯技术》编辑部 