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在DJS-130小型数字计算机上产生了均匀分布、瑞利分布与广义瑞利分布的伪随机数序列。在此基础上,对小滑窗加探测脉冲计数型检测器进行了统计试验,即所谓的Monte Carlo模拟。文中给出了虚警概率P_(fa)与第一门限V_o,第三门限nk的关系曲线,并将其与理论计算结果进行了比较,发现两者非常一致;同时给出了P_(fa)=10~(-6),10~(-5)时的各种信噪比的发现概率曲线。从所绘曲线看出,第三门限有明显的最佳值,与第三门限选在谷点时相比,约有0.8分贝的得益;另外还给出了测角时的方位中心均值与方差曲线。以上结果为设计此种类型的小滑窗检测器提供了依据。为了将此种小滑窗检测器与滑窗检测器进行比较,我们也对滑窗检测器进行了Monte Carlo模拟,给出了P_(fa)=10~(-6)时的发现概率曲线及方位中心的均值,方差曲线。在本文的具体条件下,将两种检测器的统计试验结果进行了比较。我们发现,此种类型的小滑窗检测器在性能上不如滑窗检测器,约差0.28分贝左右;测角时,方位中心的均值都与信噪比无关,滑窗检测器的方位中心标准差在a较小时,要小于此种类型的小滑窗检测器,但两者均不超过0.14度。
On the DJS-130 small digital computer, a pseudo-random number sequence with uniform distribution, Rayleigh distribution and generalized Rayleigh distribution is generated. On this basis, a statistical test was carried out on a small sliding window plus detection pulse counting detector, which is called Monte Carlo simulation. The relationship between the false alarm probability P_ (fa) and the first threshold V_o and the third threshold nk is given and compared with the theoretical results. The results show that the two are in good agreement. At the same time, = 10 ~ (-6), 10 ~ (-5) when the probability of finding the various SNR curves. It can be seen from the curve that the third threshold has the obvious best value, which is about 0.8 dB compared with the third threshold at the valley point. In addition, the average of the center of azimuth Variance curve. The above results provide a basis for the design of this type of small window detector. In order to compare this kind of small window detector with sliding window detector, Monte Carlo simulation of sliding window detector is also given, and the probability of finding probability when P fa is 10 -6 is given. Azimuth center mean, variance curve. Under the specific conditions of this paper, the statistical test results of two kinds of detectors are compared. We found that this type of small sliding window detector is not as good as the sliding window detector in performance, about 0.28 decibels; when the angle is measured, the average of the bearing centers has nothing to do with the signal to noise ratio. The bearing center of the sliding window detector The difference is smaller at a smaller time than this type of small window detector, but neither exceeds 0.14 degrees.