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| Performance of Ordered Statistic CFAR Detector Under Log-normal Distributed Clutter |
| Hu Wen-lin①②; Wang Yong-liang②; Wang Shou-yong② |
| ①School of Electronic Science and Engineering, NUDT, Changsha 410073, China; ②Key Lab.,Air Force Radar Academy Army, Wuhan 430019, China |
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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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Received: 08 December 2005
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2007, Vol. 29 
