本文關(guān)鍵詞： 無人機 欺騙干擾 雷達欺騙 航跡欺騙　出處：《電子科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：無人機載雷達欺騙技術(shù)利用無人機隱蔽性好、價格低廉和機動性高等特性,能夠針對某些雷達實施欺騙干擾。然而,由于轉(zhuǎn)發(fā)旁瓣功率過大、多普勒頻移精度和功率控制精度低等原因使得欺騙干擾很難取得預(yù)期效果,甚至無法形成航跡。同時,隨著MTI/MTD等抗干擾技術(shù)的廣泛應(yīng)用,欺騙式干擾的成功率大大降低。本文介紹了一種無人機載的雷達欺騙設(shè)備的研究、實現(xiàn)和測試等過程。針對若干種雷達技術(shù)及其對抗手段展開了研究,包括航跡欺騙、高度欺騙、MTI/MTD欺騙等,給出了基于數(shù)字儲頻原理的欺騙干擾核心解決方案,最后進行了可行性驗證并給出了實際測試結(jié)果。具體工作包括:(1)基于雷達測距、測角、MTI/MTD技術(shù)原理,討論了其距離欺騙、高度欺騙和MTI/MTD欺騙的可行性,并提出了基于波形延遲、脈沖形態(tài)判別與功率控制和虛擬多普勒等技術(shù)的欺騙方法。(2)設(shè)計并實現(xiàn)了一種無人機載的雷達欺騙設(shè)備,包括:基于數(shù)字儲頻的系統(tǒng)架構(gòu),利用FPGA內(nèi)建RAM設(shè)計并實現(xiàn)采樣率高達1.25GSPS的中頻波形存儲模塊;設(shè)計并實現(xiàn)了脈沖形態(tài)判定狀態(tài)機用于脈沖形態(tài)識別;通過對雷達主瓣信號測周實現(xiàn)了旁瓣抑制。同時,使用DDS芯片精確控制載頻實現(xiàn)了多普勒頻移模擬。另外,設(shè)計了設(shè)備的無線通信報文格式,實現(xiàn)了地面站控制軟件用于動態(tài)調(diào)整欺騙參數(shù);并結(jié)合Matlab和E4438C矢量信號發(fā)生器實現(xiàn)了設(shè)備的模擬輸入源。(3)通過模擬測試展示了設(shè)備的整機指標和性能,并在外場實測中成功實現(xiàn)了雷達欺騙干擾,測試結(jié)果驗證了高度欺騙、航跡欺騙和MTI/MTD欺騙等功能的正確性。
[Abstract]:Unmanned airborne radar deceptive technology can implement deception jamming against some radars by using unmanned aerial vehicles (UAVs) such as good concealment, low price and high maneuverability. However, because of the high power of forwarding sidelobe, Because of the low accuracy of Doppler frequency shift and power control, it is very difficult to obtain the expected effect of deception jamming, or even to form track. At the same time, with the wide application of anti-jamming technology such as MTI/MTD, The success rate of deceptive jamming is greatly reduced. In this paper, the research, realization and testing of a radar deception device on UAV are introduced. Some radar technologies and their countermeasures, including track deception, are studied. High deceptive MTI / MTD spoofing, the core solution of deceptive jamming based on digital frequency storage principle is presented. Finally, the feasibility is verified and the actual test results are given. The specific work includes: 1) based on radar ranging, angle measurement MTI / MTD technical principle, The feasibility of distance deception, height deception and MTI/MTD deception is discussed, and the waveform delay is proposed. The deceptive method of pulse shape discrimination and power control and virtual Doppler is used to design and implement a radar deceptive device based on UAV, which includes: a system architecture based on digital frequency storage. The if waveform storage module with sampling rate up to 1.25GSPS is designed and realized by using FPGA built-in RAM, the pulse shape determination state machine is designed and implemented for pulse shape recognition, and the sidelobe suppression is realized by measuring the cycle of radar main lobe signal. The Doppler frequency shift simulation is realized by using DDS chip to control the carrier frequency accurately. In addition, the wireless communication message format of the device is designed, and the ground station control software is used to dynamically adjust the spoofing parameters. Combined with Matlab and E4438C vector signal generator, the analog input source of the equipment is realized. The performance of the equipment is demonstrated by simulation test. The radar spoofing jamming is successfully realized in the field measurement. The test results verify the high degree of deception. Track spoofing and MTI/MTD spoofing are correct.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN974
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本文編號：1527207