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本文提出并研究在参考单元中有干扰目标时使用的三种检测器。在加权单元平均恒虚警率(WCA—CFAR)检测器中,根据干扰电平对由超前和滞后距离单元产生的均值加权。最佳权重既保持获得 CFAR 又使检测概率最大。接着研究校对平均电平检测器(CMLD),它要求准确地知道干扰目标的数目。研究 CMLD 对SwerlingⅣ目标的检测性能,并同 SwellingⅡ目标的检测性能相比较。然后,介绍广义校对平均电平检测器(GCMLD)。GCMLD 不要求事先知道干扰目标的数量并获得良好的性能。它先确定干扰目标的数量,然后删除它们对应的采样。推导删除干扰目标概率和总检测概率的精确表达式。本文还给出了 GCMLD 与近来提出的CFAR 检测器的性能比较,以证明 GCMLD 的优越性。
This paper presents and investigates three detectors used when interfering targets in a reference cell. In the WCA-CFAR detector, the mean produced by the leading and lagging distance elements is weighted according to the interference level. The best weight keeps both the CFAR and the detection probability. Then study the proof of mean level detector (CMLD), which requires accurate knowledge of the number of interfering targets. The detection performance of CMLD on Swerling IV target was compared with that of Swelling II target. Then, introduce the generalized proofreading average level detector (GCMLD). GCMLD does not require prior knowledge of the number of interfering targets and good performance. It first determines the number of interfering targets and then deletes their corresponding samples. Derive the exact expression of the target probability of interference removal and the total detection probability. This article also gives a comparison of the performance of GCMLD with the CFAR detector recently proposed to prove the superiority of GCMLD.