基于峰均比的混响室独立样本数估计  

Estimation of Independent Sample Number in Reverberation Chamber Using Maximum-to-mean Ratio Method

作　　者：徐千 张旭 范岩 陈阳 张云蕾 卢田丰 黄漪 Xu Qian;Zhang Xu;Fan Yan

机构地区：[1]南京航空航天大学 [2]中汽研新能源汽车检验中心(天津)有限公司 [3]国家物理实验室(英国) [4]利物浦大学(英国)

出　　处：《安全与电磁兼容》2023年第5期38-41,共4页Safety & EMC

基　　金：国防基础科研计划(JCKYS2021DC05);南京航空航天大学前瞻布局科研专项。

摘　　要：混响室搅拌过程中的有效独立样本数与其性能评估密切相关。文章从Weibull分布出发,推导了混响室中接收功率样本峰值的概率密度函数,给出了样本峰值的期望值与独立样本数之间的关系;提出采用样本峰值与均值之比(简称峰均比)的方法估计测量数据的独立样本数。对比现有的独立样本数评估方法——相关角度法,峰均比法适用于混响室任意搅拌方式,物理意义自洽,计算过程相对简单。相关角度法与峰均比法的对比测试结果验证了峰均比法的准确性。Independent sample number is a key figure of merit in characterizing the performance of the stirring process in a reverberation chamber.Starting from the Weibull distribution,the article derives the probability density function of the maximum received power in a reverberation chamber,presents the relationship between the maximum-to-mean ratio and the independent sample number,and proposes a method to use the maximumto-mean ratio of the received power to estimate the independent sample number.Different from the correlationangle method,the maximum-to-mean ratio method can be applied to arbitrary stirring process,the physical meaning of the method is clear and the method itself is self-consistent,the calculation process is relatively easy.The validity of the proposed method is verified by measurements.

关 键 词：独立样本数 峰均比 电磁混响室 

分 类 号：TN03[电子电信—物理电子学]