弓网系统的无线电干扰特性研究  

Radio-frequency interference characteristic of electrical multiple units pantograph and catenaries

作　　者：单秦[1] 闻映红[1] 蔡伯根[1] 

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《华中科技大学学报（自然科学版）》2011年第9期20-24,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金重点资助项目(60736047);中央高校基本科研业务费专项基金资助项目(2009JBM154)

摘　　要：在实际测量的基础上,通过对大量数据进行统计分析,应用数理统计方法对高速铁路弓网系统产生的无线电干扰场强进行研究,获得干扰电平的频率特性曲线.利用柯尔莫可洛夫-斯米洛夫检验判断干扰电平的概率分布,然后利用最大似然估计得到相应的参数,最后得出干扰的幅度概率分布.在此基础上,根据干扰源的特性得出了弓网系统的无线电干扰对通信系统误码率的影响,最终得到在保证通信系统所要求的误码率的条件下,通信系统所需的有用信号场强.Frequency characteristic of radio-frequency interference （RFI） produced by electrical multiple units pantograph and catenaries was obtained through mathematic statistic method, after the measured data were analyzed. The probability distribution of the interference level was judged using Kolmogorov-Smirnov test, and then the corresponding parameters of probability distribution of the interference level was estimated using maximum likelihood estimation, and then the amplitude probability distribution was obtained. On that basis, the influence of RFI on bit error ratio （BER） of communica- tion system was obtained according to the characteristics of the interference source. Finally the useful signal field was obtained ensuring quality of communications system under the condition of BER.

关 键 词：无线电干扰 频率特性 幅度概率分布 误码率 弓网系统 

分 类 号：TN014[电子电信—物理电子学]