雷达抗DRFM干扰技术研究
发布时间：2018-11-15 06:34
【摘要】：由于数字射频存储器(DRFM)技术的突破,目前欺骗式干扰机主要使用转发式干扰。只要干扰信号调制参数处于雷达正常的信号处理范围内,它也可以获得雷达的信号处理增益。因此可以极大地降低对干扰功率的要求,特别适用于干扰各种相参信号处理体制的雷达。DRFM可以产生单假目标,多假目标,移频干扰,间歇采样DRFM干扰等各种干扰方式,干扰效能日益增强,给雷达抗干扰提出了极大的挑战。在此情形下,本文以脉冲压缩体制雷达和DRFM干扰为研究背景,从干扰机工作体制,设计雷达信号波形,脉内或脉间抗干扰算法等思考点出发,对雷达抗DRFM干扰作了较为细致的研究。文中讲述了一种多脉冲雷达发射信号抗收发分时体制DRFM干扰的方法,在雷达接收端设置多路匹配滤波器,通过目标超过门限的数目来判断真假目标。针对DRFM跨周期方式产生导前假目标干扰,文中提出了随机相位LFM信号和脉内随机相位脉间伪随机编码信号抗数字储频干扰的方法,这两种复杂波形都具有良好的自相关特性,而互相关特性弱的特点。文中还针对DRFM示样脉冲存储干扰的特点,分析了复杂波形抗DRFM示样脉冲存储干扰的方法。最后,本文提出了基于正交性原理和脉冲分集技术的抗数字储频干扰方法,该方法适用于被保护目标位于干扰机前方和DRFM通过跨周期方式产生导前假目标的情况。
[Abstract]:Because of the breakthrough of digital RF memory (DRFM) technology, the spoofed jammer mainly uses forward jamming. As long as the modulation parameters of the jamming signal are within the normal range of radar signal processing, it can also obtain the signal processing gain of the radar. Therefore, it can greatly reduce the requirement of jamming power, especially suitable for jamming radar with various coherent signal processing systems. DRFM can produce all kinds of jamming methods such as single false target, multiple false target, frequency shift jamming, intermittent sampling DRFM jamming, etc. The jamming efficiency is increasing, which poses a great challenge to radar anti-jamming. In this case, based on the research background of pulse compression radar and DRFM jamming, this paper starts from the working system of the jammer, the design of radar signal waveform, the anti-jamming algorithm within or between pulses, and so on. The radar anti-DRFM jamming is studied in detail. In this paper, a method of resisting DRFM interference of multi-pulse radar transmitting signal is described. A multi-channel matched filter is set at the receiving end of the radar, and the true or false target is judged by the number of targets exceeding the threshold. In this paper, a method of resisting digital frequency storage interference of random phase LFM signal and random phase pseudorandom coded signal between pulses is proposed, which can generate false target interference in front of DRFM in a cross-period mode. Both of these complex waveforms have good autocorrelation characteristics. And the cross correlation characteristic is weak. According to the characteristics of DRFM sample memory interference, the method of complex waveform against DRFM sample memory interference is analyzed. Finally, a digital frequency storage jamming method based on orthogonality principle and pulse diversity technique is proposed. This method is suitable for the situation where the protected target is located in front of the jammer and the DRFM generates the false target before the pilot in a cross-period manner.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN974
本文编号：2332400
[Abstract]:Because of the breakthrough of digital RF memory (DRFM) technology, the spoofed jammer mainly uses forward jamming. As long as the modulation parameters of the jamming signal are within the normal range of radar signal processing, it can also obtain the signal processing gain of the radar. Therefore, it can greatly reduce the requirement of jamming power, especially suitable for jamming radar with various coherent signal processing systems. DRFM can produce all kinds of jamming methods such as single false target, multiple false target, frequency shift jamming, intermittent sampling DRFM jamming, etc. The jamming efficiency is increasing, which poses a great challenge to radar anti-jamming. In this case, based on the research background of pulse compression radar and DRFM jamming, this paper starts from the working system of the jammer, the design of radar signal waveform, the anti-jamming algorithm within or between pulses, and so on. The radar anti-DRFM jamming is studied in detail. In this paper, a method of resisting DRFM interference of multi-pulse radar transmitting signal is described. A multi-channel matched filter is set at the receiving end of the radar, and the true or false target is judged by the number of targets exceeding the threshold. In this paper, a method of resisting digital frequency storage interference of random phase LFM signal and random phase pseudorandom coded signal between pulses is proposed, which can generate false target interference in front of DRFM in a cross-period mode. Both of these complex waveforms have good autocorrelation characteristics. And the cross correlation characteristic is weak. According to the characteristics of DRFM sample memory interference, the method of complex waveform against DRFM sample memory interference is analyzed. Finally, a digital frequency storage jamming method based on orthogonality principle and pulse diversity technique is proposed. This method is suitable for the situation where the protected target is located in front of the jammer and the DRFM generates the false target before the pilot in a cross-period manner.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN974
【参考文献】
相关硕士学位论文 前1条
1 王忠林;数字储频的应用分析[D];电子科技大学;2012年
，本文编号：2332400
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