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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Some of Problems of Direction Finding of Ground-Based Radars Using Monopulse Location System Installed on Unmanned Aerial Vehicle
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Some of Problems of Direction Finding of Ground-Based Radars Using Monopulse Location System Installed on Unmanned Aerial Vehicle

机译：无人机定位系统安装地基雷达方向查找问题的一些问题

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摘要

Locating active radars in real environmental conditions is a very important and complex task. The efficiency of the direction finding (DF) of ground-based radars and other microwave emitters using unmanned aerial vehicles (UAV) is dependent on the parameters of applied devices for angle location of microwave emitters, and on the construction and modes of operation of the observed transmitting antenna systems. An additional factor having the influence on DF of the radar, when are used systems installed on the UAV, is the rotation of the antenna of a radar. The accuracy of estimation of direction of any microwave transmitter is determined by the terrain properties that surround the transmitter and the objects reflecting microwave signals. The exemplary shapes of the radar antenna patterns and the associated relationships with the probability of remotely detecting the radar and determining its bearings are described. The simulated patterns of the signals received at an emitter-locating device mounted on a UAV and the expected results of a monopulse DF based on these signals are presented. The novelty of this work is the analysis of the DF efficiency of radars in conditions where intense multi-path phenomena appear, and for various amplitudes and phases of the direct signal and multi-path signals that reach the UAV when assuming that so-called simple signals and linear frequency modulation (LFM) signals are transmitted by the radar. The primary focus is on multi-path phenomenon, which can make it difficult, but not entirely impossible, to detect activity and location of radar with a low-flying small UAV and using only monopulse techniques, that is, when only a single pulse emitted by a radar must be sufficient to DF of this radar. Direction of arrival (DOA) algorithms of signals in dense signal environment were not presented in the work, but relevant suggestions were made for the design of such algorithms.
机译：在真正的环境条件下定位有效雷达是一个非常重要和复杂的任务。使用无人驾驶飞行器（UAV）的地基雷达和其他微波发射器的方向查找（DF）的效率取决于微波发射器的角度位置的应用装置的参数，以及施工和操作模式观察到的传输天线系统。当安装在UAV上的使用系统时，对雷达的DF影响的额外因素是雷达天线的旋转。任何微波发射器的方向估计的准确性由地形特性确定，其围绕发射器和反射微波信号的物体。描述了雷达天线图案的示例性形状和与远程检测雷达的概率和确定其轴承的概率的相关关系。呈现了在安装在UAV上的发射器定位装置上接收的信号的模拟图案和基于这些信号的Monopulse DF的预期结果。这项工作的新颖性是分析雷达在激烈的多路现象出现的条件下的DF效率，以及用于在假设所谓的简单时到达UAV的直接信号和多路径信号的各种幅度和多路径信号和线性频率调制（LFM）信号由雷达传输。主要焦点是在多路上现象上，这可以使其难以，但并不完全不可能，以利用低飞行的小无人机和仅使用单个脉冲发出的单个脉冲时检测雷达的活动和位置。通过雷达必须足以使该雷达的DF。到达方向（DOA）致密信号环境中信号的算法未在工作中呈现，但是对这种算法的设计进行了相关的建议。

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