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Target recognitionudtechniques forudmultifunction phasedudarray radar

机译：目标识别 ud技术多功能相控阵列雷达

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摘要

This thesis, submitted for the degree of Doctor of Philosophy at University College London, is auddiscussion and analysis of combined stepped-frequency and pulse-Doppler target recognition methodsudwhich enable a multifunction phased array radar designed for automatic surveillance and multi-targetudtracking to offer a Non Cooperative Target Recognition (NCTR) capability. The primary challengeudis to investigate the feasibility of NCTR via the use of high range resolution profiles. Given steppedudfrequency waveforms effectively trade time for enhanced bandwidth, and thus resolution, attention isudpaid to the design of a compromise between resolution and dwell time. A secondary challenge is toudinvestigate the additional benefits to overall target classification when the number of coherent pulsesudwithin an NCTR wavefrom is expanded to enable the extraction of spectral features which can helpudto differentiate particular classes of target. As with increased range resolution, the price for this extraudinformation is a further increase in dwell time. The response to the primary and secondary challengesuddescribed above has involved the development of a number of novel techniques, which are summarizedudbelow:ud• Design and execution of a series of experiments to further the understanding of multifunctionudphased array Radar NCTR techniquesud• Development of a ‘Hybrid’ stepped frequency technique which enables a significant extensionudof range profiles without the proportional trade in resolution as experienced with ‘Classical’udtechniquesud• Development of an ‘end to end’ NCTR processing and visualization pipelineud• Use of ‘Doppler fraction’ spectral features to enable aircraft target classification via propulsionudmechanism. Combination of Doppler fraction and physical length features to enable broadudaircraft type classification.ud• Optimization of NCTR method classification performance as a function of feature and waveformudparameters.ud• Generic waveform design tools to enable delivery of time costly NCTR waveforms within operationaludconstraints.udThe thesis is largely based upon an analysis of experimental results obtained using the multifunctionudphased array radar MESAR2, based at BAE Systems on the Isle of Wight. The NCTRudmode of MESAR2 consists of the transmission and reception of successive multi-pulse coherent burstsudupon each target being tracked. Each burst is stepped in frequency resulting in an overall bandwidthudsufficient to provide sub-metre range resolution. A sequence of experiments, (static trials, movingudpoint target trials and full aircraft trials) are described and an analysis of the robustness of targetudlength and Doppler spectra feature measurements from NCTR mode data recordings is presented. Audrecorded data archive of 1498 NCTR looks upon 17 different trials aircraft using five different varietiesudof stepped frequency waveform is used to determine classification performance as a function ofudvarious signal processing parameters and extent (numbers of pulses) of the data used. From analysisudof the trials data, recommendations are made with regards to the design of an NCTR mode for anudoperational system that uses stepped frequency techniques by design choice.
机译：本论文是伦敦大学学院哲学博士学位的论文，是对步进频率和脉冲多普勒目标识别方法相结合的讨论和分析，它使多功能相控阵雷达设计用于自动监视和多目标 udtracking提供非合作目标识别（NCTR）功能。主要挑战在于通过使用高范围分辨率曲线来研究NCTR的可行性。给定阶跃低频波形有效地权衡时间以增加带宽，从而提高分辨率，则要注意分辨率和驻留时间之间折衷的设计。第二个挑战是，当扩展NCTR波内的相干脉冲数以扩展频谱特征的提取以帮助提取光谱特征，从而有助于区分特定的目标类别时，要研究总体目标分类的其他好处。与增加的范围分辨率一样，此额外 udinformation的价格是驻留时间的进一步增加。针对上述主要挑战和次要挑战的响应涉及了许多新颖技术的发展，总结如下：ud•设计和执行一系列实验以进一步理解多功能同相阵列雷达NCTR技术 ud•开发了“混合”步进频率技术，该技术可实现大幅扩展 udof范围配置文件，而无需像“经典” udtechniques ud所经历的分辨率成比例的交易。开发“端到端” NCTR处理和可视化管道 ud•使用“多普勒分数”频谱特征通过推进 udmechanism实现飞机目标分类。多普勒分数和物理长度特征的组合可实现广泛的飞机类型分类。 ud•根据特征和波形 udparameters优化NCTR方法分类性能。 ud•通用波形设计工具可提供时间成本高昂的NCTR波形本文主要是基于对怀特岛BAE Systems公司使用多功能同相阵列雷达MESAR2获得的实验结果的分析。 MESAR2的NCTR udmode由连续跟踪的多脉冲相干突发的传输和接收 udupon组成，每个目标都被跟踪。每个突发的频率步进导致总带宽不足以提供亚米范围的分辨率。描述了一系列实验（静态试验，移动目标靶试验和完整飞机试验），并从NCTR模式数据记录中分析了目标靶长和多普勒光谱特征测量的鲁棒性。 1498 NCTR的一个未记录的数据档案库使用五种不同的品种 udof步进频率波形，对17架不同的试验飞机进行了研究，用于确定分类性能作为 ud信号处理参数和所使用数据的范围（脉冲数）的函数。从试验数据的分析 ud，就设计/使用步进频率技术的操作系统的NCTR模式的设计提出了建议。

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    French A.;

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  • 年度 2010
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  • 正文语种 {"code":"en","name":"English","id":9}
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