无人机载的雷达欺骗设备研究与实现

发布时间：2018-02-23 18:40

  本文关键词： 无人机 欺骗干扰 雷达欺骗 航迹欺骗　出处：《电子科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：无人机载雷达欺骗技术利用无人机隐蔽性好、价格低廉和机动性高等特性,能够针对某些雷达实施欺骗干扰。然而,由于转发旁瓣功率过大、多普勒频移精度和功率控制精度低等原因使得欺骗干扰很难取得预期效果,甚至无法形成航迹。同时,随着MTI/MTD等抗干扰技术的广泛应用,欺骗式干扰的成功率大大降低。本文介绍了一种无人机载的雷达欺骗设备的研究、实现和测试等过程。针对若干种雷达技术及其对抗手段展开了研究,包括航迹欺骗、高度欺骗、MTI/MTD欺骗等,给出了基于数字储频原理的欺骗干扰核心解决方案,最后进行了可行性验证并给出了实际测试结果。具体工作包括:(1)基于雷达测距、测角、MTI/MTD技术原理,讨论了其距离欺骗、高度欺骗和MTI/MTD欺骗的可行性,并提出了基于波形延迟、脉冲形态判别与功率控制和虚拟多普勒等技术的欺骗方法。(2)设计并实现了一种无人机载的雷达欺骗设备,包括:基于数字储频的系统架构,利用FPGA内建RAM设计并实现采样率高达1.25GSPS的中频波形存储模块;设计并实现了脉冲形态判定状态机用于脉冲形态识别;通过对雷达主瓣信号测周实现了旁瓣抑制。同时,使用DDS芯片精确控制载频实现了多普勒频移模拟。另外,设计了设备的无线通信报文格式,实现了地面站控制软件用于动态调整欺骗参数;并结合Matlab和E4438C矢量信号发生器实现了设备的模拟输入源。(3)通过模拟测试展示了设备的整机指标和性能,并在外场实测中成功实现了雷达欺骗干扰,测试结果验证了高度欺骗、航迹欺骗和MTI/MTD欺骗等功能的正确性。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN974
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本文编号：1527207