| 一种LFM雷达回波对消干扰算法 |
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| 引用本文： | 王玉军,赵国庆,王宏伟.一种LFM雷达回波对消干扰算法[J].西安电子科技大学学报,2008,35(6):1031-1035. |
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| 作者姓名： | 王玉军 赵国庆 王宏伟 |
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| 作者单位： | (1. 西安电子科技大学 电子对抗研究所，陕西 西安 710071; 2. 空军工程大学 电讯工程学院，陕西 西安 710077) |
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| 基金项目： | 武器装备预研基金
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| 摘 要： | 根据线性调频(LFM)信号群延迟特性，提出了一种针对LFM雷达的回波对消干扰算法．首先将LFM信号与其自身延迟信号的共轭相乘，用所得频率差对LFM信号进行移频，然后根据目标雷达散射截面积特性进行幅度和相位调制，可产生与目标回波同频反相的信号，达到与目标回波对消的目的．给出了一种实现此算法的干扰机结构，并提出了减小非线性相位误差的方法．理论分析与仿真表明，该算法在未知调频斜率的情况下可有效降低进入雷达接收机的回波信号功率，且在干扰机有较大转发延迟的情况下依然有效．
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| 关 键 词： | 雷达对抗 干扰 对消 线性调频 有源隐身 |
| 收稿时间： | 2008-03-25 |
Echo cancelling algorithm for the LFM radar |
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| WANG Yu-jun,ZHAO Guo-qing,WANG Hong-wei.Echo cancelling algorithm for the LFM radar[J].Journal of Xidian University,2008,35(6):1031-1035. |
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| Authors: | WANG Yu-jun ZHAO Guo-qing WANG Hong-wei |
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| Affiliation: | (1. Research Inst. of Electronic Countermeasures, Xidian Univ., Xi’an 710071， China;2. Telecommunication Eng. Inst., Airforce Eng. Univ., Xi’an 710077， China) ; |
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| Abstract: | A new algorithm is proposed for radar echo cancelling based on the group delay of the LFM(Linear Frequency Modulated) signal.Firstly,the received signal is multiplied by the conjugation of its delayed version to get the frequency difference between them.The received signal's frequency is then shifted using the frequency difference.According to the target's RCS(Radar Cross Section),phase and amplitude modulation are made in order to get the signal having the same frequency as the echo pulse but with the oppo... |
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| Keywords: | radar countermeasures jamming cancelling linear frequency modulated active stealth |
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