一种基于顺序统计量的距离扩展目标检测器
doi: 10.3724/SP.J.1146.2008.01471
Order-Statistic-Based Detector for Range Spread Target
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摘要: 该文提出一种高斯白噪声中的距离扩展目标检测器。实际目标的宽带雷达回波能量往往集中于若干距离单元中，基于这一事实，对检测窗内的回波数据按能量降序进行排列，然后顺序进行能量积累和检测，直到做出判决为止。文中详细推导了检测器的虚警概率，给出了设置检测门限的方法。最后通过Monte Carlo实验，利用两类特殊能量分布方式的距离像和一个实际目标的实测距离像，对比分析了该文提出的基于顺序统计量的距离扩展目标检测器相对于能量积累检测器的性能。对于回波能量集中于少数距离单元的距离像，该文提出的检测器比能量检测器具有更好的检测性能。Abstract: A detector based on order statistic for range spread target in white Gaussian noise is derived in this paper. With the fact that the power of wideband radar target return is concentrated in several range bins, the data in the detection window is re-arranged in the order of energy decreasing, then the energy accumulation and detection is implemented in order, until the decision is made. The false alarm rate of the detector is derived and the method of threshold setting is proposed. Finally, the performance of proposed detector compared with that of the integration detector is given by Monte Carlo experiment, with two special energy distributing range profiles and a measured range profile of an actual target. For the range profiles that the energy of the return is concentrated in several range bins, the detector proposed in this paper has a better performance than the integration detector.
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