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通过外辐射源雷达与情报雷达异地配置方式下的组网,利用外辐射源雷达生存能力强、反隐身隐蔽性能好、数据率高、测速精度较高等特征,可进一步提高对目标的定位精度及对隐身目标的探测能力。文中将基于“当前”模型的扩展卡尔曼滤波应用于外辐射源雷达与情报雷达的数据融合,仿真表明利用这两类雷达的互补特性,通过数据融合,滤波后得到的目标的定位精度及速度精度有大幅度提高。 相似文献
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针对电子干扰和隐身目标的威胁日趋恶化的趋势,本文研究了电子对抗环境下T/R-R型双基地雷达如何运用数据融合实现对隐身目标的三维跟踪问题.按照无-弱-较强-强的干扰强度变化,提出了双基地雷达采取不同观测子集对隐身目标的跟踪技术,对不同干扰方式下双基地雷达对隐身目标的测量误差以及双基地雷达截面积的计算进行了讨论,建立了电子战环境下双基地雷达对隐身目标的测量模型,给出了几种典型情况下的计算机仿真结果,验证了双基地雷达反隐身的有效性. 相似文献
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分析了国内外现有标准规范对军机特征信号的抑制要求,指出其不足之处.根据周边国家和地区装备的雷达和光学探测装置的主要性能,研究了我国现阶段军机面临的主要威胁及其特点;提出了我国现阶段新型战斗机雷达与红外隐身设计的主要要求,包括隐身频段、隐身姿态及应具有的隐身性能. 相似文献
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分布式网络雷达利用多部节点雷达对责任区域的多角度重叠覆盖,挖掘低RCS目标的空间相关性,从而提高系统对隐身目标的探测能力。通过与单部大型雷达相比较,对分布式网络雷达的反隐身能力进行分析与仿真,结果表明分布式网络雷达具有较好的反隐身能力。 相似文献
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介绍了甚高频(VHF)频段、工作在水平(H)或垂直(V)极化发射-接收组合(即HH、VV、HV、VH)情况下隐身目标缩比模型的雷达散射截面积(RCS)测量方法;给出了低频段RCS测量与计算的详细过程,采用背景杂波对消和时域加窗处理的方法减少了低频段RCS测量的误差;并给出了两种隐身目标缩比模型的RCS测量结果。测量结果表明:由于谐振效应,在VHF下端的低频段,隐身目标的RCS在平方米的量级,远大于在微波段的测量值;在部分频点,交叉极化的RCS甚至比同极化还强。这为利用隐身目标在频率域的谐振效应和极化域的极化特征,设计具有探测隐身目标能力的现代雷达提供了理论依据。 相似文献
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Nonsinusoidal radar signal design for stealth targets 总被引:1,自引:0,他引:1
The detection of stealth point targets challenges the design of conventional radars using sinusoidal carriers since the objective of stealth technology is to reduce the radar cross section (RCS) of targets to a level where the radar receiver cannot detect the target. While there are a number of techniques employing different technologies to reduce the RCS of targets, shaping and coating the target with absorbing material are the most useful ones. The analysis and design of nonsinusoidal radar signals is based on modeling stealth point targets by a two-layer structure consisting of a metal surface covered with a coat of absorbing material. The design is presented for two classes of signals: uncoded signals and pulse compression signals using Barker codes. The relationship between target response, absorbing material time delay, time variation of transmitted pulses and coding features are determined and analyzed. While sliding correlators are used for detection and selection of various target responses, their output autocorrelation functions are determined analytically in terms of transmitted signal autocorrelation functions. Thumbtack range-velocity resolution functions are obtained for transmitted signal characters with a single pulse and characters with coded waveforms, for different pulse duration. It is shown that the range resolution can be improved by the proper choice of the transmitted signal duration relative to absorbing material time delay. Thumbtack range-velocity resolution functions similar to those of conventional point targets can also be realized 相似文献
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文中介绍了地面对空情报三坐标雷达的主要技术发展历程,以及国外典型雷达的发展过程、现状及特点。在当今复杂电磁环境中,地面情报雷达任务从以前只是对飞机、直升机、无人机等目标探测向隐身飞机、临近空间目标和战术弹道导弹探测方向发展,针对新军事需求,从雷达系统角度,重点介绍地面对空情报三坐标雷达后续技术发展。 相似文献
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频率步进雷达及其在小目标检测中的应用 总被引:7,自引:4,他引:3
在强杂波环境下检测一类重要小目标(如巡航导弹,反舰掠海导弹,隐身飞机)是现代雷达面临的一个最具有挑战性的课题。频率步进雷达,由于其高距离分辨能力及独特的波形和处理,正在用来解决强杂波中小目标的检测问题。文中首先介绍了频率步进宽带高距离分辨雷达的原理和技术,然后讨论了应用频率步进雷达解决强杂波中运动小目标的无杂波区检测和无折叠杂波检测问题。 相似文献
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The detection of low flying targets with small radar cross section (RCS), known as low observables, such as cruise missiles and stealth airplanes adds a new dimension to radar signal design and radar signal processing. A high resolution look-down radar is very attractive since it takes advantage of target shape to overcome difficulties encountered with small RCS. The look-down geometry, however, imposes three requirements: 1) the radar should detect targets with small relative velocities from almost zero to about the velocity of sound with no blind speeds, 2) it should minimize ground clutter by using short pulses, and 3) the radar signal must have a thumbtack ambiguity function. We investigate a look-down radar that eliminates time side lobes of compressed signal correlation functions to improve range resolution, reduces ground clutter to enhance receiver dynamic range, and uses thumbtack resolution function to resolve moving low observable targets from the surface of the Earth. The side lobe elimination technique transforms the correlation function of a coded waveform, based on complementary codes, to the correlation function of a single pulse. Features of side lobe elimination technique along with clutter cancellation circuits are presented in terms of blind speeds and range-velocity resolution function 相似文献
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对抗隐身进攻兵器的光电探测研究 总被引:1,自引:1,他引:0
采用低可见性技术或隐身技术制造的进攻兵器是21世纪防空系统重点对抗的主要目标威胁。隐身兵器并非不可探测,采用常规的长波低频雷达可以探测低可见性目标,采用激光雷达、光电探测和雷达组网等均具有探测隐身的能力。 相似文献
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常规雷达系统越来越难于应对日益迫近的空间目标和隐身目标,MIMO雷达已成为一个发展方向。针对运动目标,本文深入分析了充分统计量的概率密度函数,讨论了四种工作模式的内涵,研究了MIMO雷达工作于四种工作模式时的检测模型、方法及性能改善。通过理论和仿真分析,建议MIMO雷达系统采用单发多收工作模式,并且,接收站数量建议取4至6。 相似文献