分析了单元平均恒虚警(CA-CFAR)检测器在多目标环境中的检测性能。通过数学推导,得出一个结论:在CA-CFAR中,当参考单元数与干扰目标数的比值小于归一化门限时,此时不管信杂比多大,CA-CFAR对主目标的检测概率始终为零,即主目标始终被“遮挡”。最后用仿真实验验证了该结论。

In this paper,the detection performance of Cell-averaging CFAR processor in multiple-target situations is analyzed.By means of mathematical derivation,a conclusion is obtained: in CA-CFAR,when the ratio of reference cell number and interfering number is smaller than the normalized threshold,the detection probability of the primary target is always zero,i.e. the primary target is always masked.At this time,the probability of detection has nothing to do with the signal to clutter ratio(SCR).Finally,this conclusion is validated by the experiment results.

TN958 TN957.51