Log-normal分布杂波背景下有序统计恒虚警检测器性能分析
doi: 10.3724/SP.J.1146.2005.01584
Performance of Ordered Statistic CFAR Detector Under Log-normal Distributed Clutter
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摘要: 该文证明了在形状参数已知的均匀对数-正态(Log-normal)杂波背景下有序统计恒虚警(OS-CFAR)检测器能保持恒虚警的特性，导出了该背景下OS-CFAR检测器对非起伏目标的检测性能表达式和平均判决阈值(ADT)表达式。最后用数值方法讨论了最佳序值的选取以及OS-CFAR检测器在取不同参考单元数时相对于理想CFAR的信杂比损失。Abstract: The property that the ordered statistics CFAR(OS-CFAR) detector can obtain constant false alarm rate under homogeneous Log-normal distributed clutter background is proved in this paper, when the shape parameter of probability density function is known. Both the detection performance expressions with non-fluctuating target and the ADT (average decision threshold) expressions of the OS-CFAR detector are derived. Finally, the optimal order value and the signal-clutter-ratio losses compared with ideal CFAR of the OS-CFAR detector are discussed by numerical method when the number of reference cells is taken different values.
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[1] Chan H C. Radar sea-clutter at low grazing angles. IEE Proc. -F, 1990, 137(2): 102-112. [2] Rohling H. Radar CFAR thresholding in clutter and multiple target situation. IEEE Trans. on AES, 1983, 19(4): 608-621. [3] Schleher D C. Radar detection in Log-normal clutter[C].Proc. of the IEEE International Radar Conference. Washintong, 1975: 262-267. [4] AL-Hussaini E K. Performance of an ordered statistic CFAR processor in Log-normal clutter[J].Electronics Letters.1988, 24(7):424-425 [5] 何友, 关键, 等. 雷达自动检测与恒虚警处理[M]. 北京: 清华大学出版社, 1999: 142-143. He You and Guan Jian, et al.. Automatic radar detection and CFAR processing[M]. Beijing: Tsinghua University Press, 1999:142-143. -
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