水鹏朗
西安电子科技大学雷达信号处理国家重点实验室 西安 710071
基金项目:国家自然科学基金(61671357)
详细信息
作者简介:张坤：男，1989年生，博士生，研究方向为压缩感知、雷达信号处理和海面目标检测及其参数估计
水鹏朗：男，1967年生，教授，博士生导师，研究方向为雷达目标探测、图像处理和滤波器组设计与应用
通讯作者:张坤 xidiankun@163.com
中图分类号:TN959.72计量
文章访问数:473
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被引次数:0
出版历程
收稿日期:2020-07-24
修回日期:2021-01-20
网络出版日期:2021-01-29
刊出日期:2021-03-22
CFAR Analysis of Non-coherent Detectors in Generalized Pareto Distributed Sea Clutter
Kun ZHANG,,Penglang SHUI
National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China
Funds:The National Natural Science Foundation of China (61671357)
摘要
摘要:该文在广义Pareto分布海杂波背景下研究了单元平均(CA)和有序统计量(OS)两种非相干检测器的恒虚警(CFAR)性质，推导了两种非相干检测器的虚警概率公式，发现了两种检测器对杂波的尺度参数是恒虚警的。然而，两种检测器对杂波的散斑协方差矩阵结构和杂波形状参数是非恒虚警的。为了实现全场景的恒虚警检测，预先通过白化方法将具有相关性的海杂波去相关，并通过查表方法使用了匹配杂波形状参数、累积脉冲数和参考单元数的检测门限。在这种情况下，实验结果表明两种非相干检测器能确保全场景恒虚警。
关键词:广义Pareto分布/
非相干检测器/
恒虚警/
海杂波
Abstract:In this paper, under the generalized Pareto distributed sea clutter, the Constant False Alarm Rate (CFAR) properties of Cell-Averaging (CA) and Order-Statistic (OS) non-coherent detectors are studied, the false alarm probability formulas of the two non-coherent detectors are derived, and it is found that the two detectors are CFAR with respect to the scale parameter of sea clutter. However, the two detectors do not have CFAR with respect to speckle covariance matrix structure and shape parameter of sea clutter. In order to ensure CFAR detection in the overall scene, the correlated sea clutter is decorrelated via whitening and the detection threshold matching the shape parameters of sea clutter, number of accumulated pulses, and number of reference cells is applied via lookup tables. In this case, the experimental results show that the two non-coherent detectors can ensure CFAR in the overall scene.
Key words:Generalized Pareto distributed/
Non-coherent detectors/
Constant False Alarm Rate (CFAR)/
Sea clutter
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