光电工程, 2018, 45 (5): 170593, 网络出版: 2018-06-01  

针对韦布尔分布的循环剔除TLM-CFAR检测器

A cycle elimination TLM-CFAR detector for Weibull clutter
作者单位
1 中国空间技术研究院西安分院,陕西 西安 710000
2 中国空间技术研究院,北京 100094
摘要
针对韦布尔分布杂波背景中的目标检测问题,本文提出了一种CFAR检测器—循环剔除TLM-CFAR检测器。该检测器基于TL 矩估计方法,首先获得韦布尔分布的两参数估计值,进而确定CFAR 检测门限,然后利用循环剔除法剔除干扰目标和强散射点的影响。文中证明了TLM-CFAR检测器具有恒虚警性,利用Monte Carlo仿真方法研究了这种检测器的性能,并与MLH-CFAR检测器进行了比较。仿真结果和实验结果表明,这种检测器不仅可以达到MLH-CFAR检测器的性能,同时避免了最大似然估计需要迭代计算的繁琐性,提高了检测算法的效率和适用性。
Abstract
For the problem of constant false alarm rate (CFAR) detection in Weibull clutter background, a CFAR detector—cycle elimination TLME-CFAR detector is proposed. The detector calculates its detection threshold through the estimation of two parameters ofWeibull distribution, which is based on TL-moment estimation. The effect of the interference target and the strong scattering point are then eliminated by the cyclic elimination method. This paper proved that the proposed detector is a CFAR detector, and then the performance of the detector is studied by Monte Carlo simulation and compared with the MLH-CFAR detector. The result shows that the cyclic elimination TLM-CFAR detector has very nearly the same performance with MLH-CFAR detector. The detector avoids iterated operation of maximum likelihood estimation, and improves the efficiency and applicability of detection algorithm.

韩东娟, 谭小敏, 史平彦. 针对韦布尔分布的循环剔除TLM-CFAR检测器[J]. 光电工程, 2018, 45(5): 170593. Han Dongjuan, Tan Xiaomin, Shi Pingyan. A cycle elimination TLM-CFAR detector for Weibull clutter[J]. Opto-Electronic Engineering, 2018, 45(5): 170593.

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