计算雷达检测器虚警概率的GEVT混合法

THE GEVT MIXED METHOD FOR THE CALCULATION OF FALSE-ALARM PROBABILITY OF RADAR DETECTORS

先扼要地回顾了解析法和模拟法计算雷达检测器性能的困难,指出用Monte—Carlo模拟方法的主要困难在于虚警概率的计算和重要采样原理在解决此困难时的局限性。提出了用GEVT混合法来计算检测器虚警概率的方法。本法的实质是:根据给定的虚警概率和第二门限,用解析法经计算得到单元虚警概率,再根据广义极值理论去拟合单元量化以前的原随机交量概率密度函数的尾部,然后根据单元虚警概率以确定第一门限(即单元量化门限)。采用本法具有运算量小的显著优点。本文最终对本法的适用范围做了分析,并得出了相应的结论。

Difficulties of the Analytical Method and Simulation Method when used for the calculation of performance of radar detectors are pointed out. The major problem of the Monte-Carlo Simulation lies in the calculation of false-alarm probability of radar detectors. Important sampling theory is sometimes helpful for resolving this problem, but it is not always successful. A mixed method is presented in this paper, and it is point out that this GEVT Mixed Method is appropriate for solving the above mentioned problem. Merits of the GEVT Mixed Method is analyzed and the necessexy condition for using it pointed out.