【摘要】：由于數(shù)字射頻存儲(chǔ)器(DRFM)技術(shù)的突破,目前欺騙式干擾機(jī)主要使用轉(zhuǎn)發(fā)式干擾。只要干擾信號(hào)調(diào)制參數(shù)處于雷達(dá)正常的信號(hào)處理范圍內(nèi),它也可以獲得雷達(dá)的信號(hào)處理增益。因此可以極大地降低對(duì)干擾功率的要求,特別適用于干擾各種相參信號(hào)處理體制的雷達(dá)。DRFM可以產(chǎn)生單假目標(biāo),多假目標(biāo),移頻干擾,間歇采樣DRFM干擾等各種干擾方式,干擾效能日益增強(qiáng),給雷達(dá)抗干擾提出了極大的挑戰(zhàn)。在此情形下,本文以脈沖壓縮體制雷達(dá)和DRFM干擾為研究背景,從干擾機(jī)工作體制,設(shè)計(jì)雷達(dá)信號(hào)波形,脈內(nèi)或脈間抗干擾算法等思考點(diǎn)出發(fā),對(duì)雷達(dá)抗DRFM干擾作了較為細(xì)致的研究。文中講述了一種多脈沖雷達(dá)發(fā)射信號(hào)抗收發(fā)分時(shí)體制DRFM干擾的方法,在雷達(dá)接收端設(shè)置多路匹配濾波器,通過(guò)目標(biāo)超過(guò)門限的數(shù)目來(lái)判斷真假目標(biāo)。針對(duì)DRFM跨周期方式產(chǎn)生導(dǎo)前假目標(biāo)干擾,文中提出了隨機(jī)相位LFM信號(hào)和脈內(nèi)隨機(jī)相位脈間偽隨機(jī)編碼信號(hào)抗數(shù)字儲(chǔ)頻干擾的方法,這兩種復(fù)雜波形都具有良好的自相關(guān)特性,而互相關(guān)特性弱的特點(diǎn)。文中還針對(duì)DRFM示樣脈沖存儲(chǔ)干擾的特點(diǎn),分析了復(fù)雜波形抗DRFM示樣脈沖存儲(chǔ)干擾的方法。最后,本文提出了基于正交性原理和脈沖分集技術(shù)的抗數(shù)字儲(chǔ)頻干擾方法,該方法適用于被保護(hù)目標(biāo)位于干擾機(jī)前方和DRFM通過(guò)跨周期方式產(chǎn)生導(dǎo)前假目標(biāo)的情況。
[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.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN974

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 王忠林;數(shù)字儲(chǔ)頻的應(yīng)用分析[D];電子科技大學(xué);2012年

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本文編號(hào)：2332400