共查询到17条相似文献，搜索用时 385 毫秒
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舰载雷达组网协同探测能力受到多种关键因素的影响,本文分析了不同雷达对同一目标观测时的RCS起伏特性,并针对典型关键因素提出了基于双雷达协同探测能力的试飞评估方法,给出雷达协同探测时的站点布设方案,以及针对分离站点模式的协同探测能力评估方法,为验证雷达协同探测能力提供了有效的工程试验手段。 相似文献
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非接触式人体探测雷达利用雷达回波中包含人体的体动和心跳呼吸等生命特征信息,来探测隐藏于固定物后人体目标的存在。本文介绍了一种宽带线性调频连续波体制的非接触式雷达的信号检测方法,基于相谱分析来实现对目标的定位和运动参数提取。 相似文献
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在雷达领域当中,气象雷达是很重要的一部分,多用于交通、气象以及农业等不同的领域当中。在民航飞机当中,气象雷达有着很重要的作用,它主要专用于大气探测,不仅可以对天气情况进行预报还可以探测出空风切变等一系列的危险因素,为中小尺度天气系统进行预报和警戒,进而有效保证民航飞机的顺利、安全航行。近几年随着电子行业的快速发展,气象雷达的性能也日益增强,探测功能也愈加广泛。本文主要分析了新型气象雷达的性能,进一步体现新型气象雷达探测性能的优越性。 相似文献
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本文主要介绍了超宽带穿墙探测雷达;设计了以FPGA和DSP的雷达回波信号处理终端;介绍了该信号处理终端的系统框架、工作原理,并采用双口RAM作为DSP和FPGA之间进行数据传输的缓冲存储器;通过实验,各模块可以相互协调地完成工作,并实现了目标回波信号的采样、算法处理、目标方位显示等功能。 相似文献
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为了对不同参数影响下的雷达威力进行数学分析,如不同的SNR,不同的RCS,以及不同的脉冲条件下雷达探测距离,常见反隐身效果进行评估与分析,我们通过采用系统仿真分析软件System Vue,对雷达方程转化为图像,进行更加直观,明了的分析。通过采用固定变量的方法,对影响雷达威力的诸多因素逐一分析。文中列举3种飞行器,对其不同的SNR,RCS、雷达探测距离以及电子对抗中各种参数进行比较分析,最终达到对雷达威力分析评估的结果。 相似文献
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<正>机载火控雷达的最大探测距离是表征雷达探测能力的一项关键指标。分析雷达方程可知雷达探测距离受多种影响因素制约,且部分环境变量往往无法度量,故直接从不同影响因素出发分析雷达最大探测距离的分布特性存在一定困难,所以大部分对雷达探测距离评估方法的研究均是从数据本身出发,通过统计学方法分析变量的分布特性。 相似文献
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超宽带穿墙成像雷达作为一种能够隔墙探测和定位的新型雷达系统，在很多领域得到应用。穿墙成像雷达有非相干方法和相干方法两种成像方法。本文采用一发二收的天线组合形式，用非相关成像方法，研究了在无墙体和有墙体两种情况下目标的定位，分析了雷达的方位向分辨率,并通过二维FDTD仿真验证了目标定位方法。 相似文献
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《Journal of The Franklin Institute》2022,359(9):4449-4467
A novel ground-moving target detection method is introduced using a distinguishing target, and clutter feature for airborne radar. The clutter proximity feature is extracted based on the Euclidean distance between a signal pixel and the expected clutter ridge in the angle-Doppler domain. Subsequently, target and clutter pixels are classified based on the extracted features for target detection without actually removing clutters or clutter estimation. The proposed technique is especially suitable for effective airborne radar target detection in the unknown ground clutter. The experimental results have validated the effectiveness of the new approach, which enables ground moving target detection in inhomogeneous clutter. 相似文献
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利用IPIX雷达回波数据分析了海杂波的统计特性.并利用LFM信号在分数阶Fourier域良好的能量聚集性,提出基于分数阶Fourier变换的海面动目标检测方法.此方法能较好的聚集动目标回波能量,而对海杂波回波的能量聚集不明显,可以较好的检测出动目标.最后采用实测海杂波数据做了仿真分析,证实了此方法的有效性. 相似文献
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The presence of significant multipath propagation and heavy clutter in indoor environments imposes severe limitations on imaging through walls, rendering through-the-wall radar imaging a difficult and complex proposition. It is highly desirable to properly interpret the radar images and determine the contents of the indoor scene with a high level of confidence. Data collected from multiple vantage points around a structure can be used to improve imaging visibility into the indoor scene, which, in turn, enhances indoor target detection and localization. In this paper, we consider multi-location radar imaging. Image fusion techniques for combining synthetic aperture radar images acquired from multiple locations along two sides of an enclosed structure are presented. Supporting results, based on real-data collected in a semi-controlled laboratory environment, are provided which demonstrate the improved performance of the multiple location scheme compared to operation from a single vantage point. 相似文献
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对L波段雷达探测系统在使用过程中常常出现的影响雷达探测高度原因问题进行分析和总结,并根据积累的工作经验,并对有关问题提出了解决方法和对策。 相似文献
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指挥引导系统中，不同的雷达站由于受到自身技术和设备的限制，它们对于同一批目标的航迹很难重合，这就需要系统对这些雷达情报进行综合处理。本文介绍了雷达情报综合处理的方法和流程。 相似文献
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Mohamed B. El Mashade 《Journal of The Franklin Institute》2011,348(6):941-972
In this article, we provide a complete detection analysis, in its exact form, of what is known as moderately fluctuating radar targets when the background environment contains a number of interfering targets along with the target under test. The illumination of this class of radar targets by a coherent pulse train, return a train of correlated pulses with a correlation coefficient in the range 0<ρ<1 (intermediate between SWII and SWI models). Since the adaptive detection is one of the desirable features for modern radar receivers, it becomes of importance to adaptively detect this class of targets. The attractive class of adaptive detectors is that based on order-statistics (OS) technique. The more advanced version of the OS algorithm, known as the generalized trimmed-mean (GTM) scheme, is chosen here to carry out this task. It implements trimmed averaging of a weighted ordered range samples. This processor is analyzed for the case where the radar receiver incorporates a postdetection integrator amongst its contents and where the operating environment is multitarget. The primary and the secondary interfering targets are assumed to be fluctuating in accordance with partially correlated χ2 fluctuation model. SWI and SWII well-known models represent the cases where the signal is completely correlated and completely decorrelated, respectively, from pulse to pulse. It is shown that the processor performance improves, for weak SNR of the primary target, as the correlation coefficient ρs increases and this occurs either in the absence or in the presence of spurious targets. For strong SNR, on the other hand, the processor performance degrades as ρs increases and the SWI and SWII models enclose the correlated target case and this behavior is common for all GTM based schemes. 相似文献
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PD模式雷达,IQ信号被干扰,引起相位变化,导致画面虚警增加,速度解算不准确,目标检测能力下降的问题,采集数据仿真分析,提出一种解决方法,进而工程实现,得到比较好的效果。 相似文献