铁路专用移动通信场强测量检波方式研究  

Detection Modes of Field Strength Measurement in Railway Dedicated Mobile Communication Network

作　　者：丁建文[1,2] 刘杨[3] 费丹[3] 钟章队[3] 

机构地区：[1]北京交通大学国家轨道交通安全评估研究中心,北京100044 [2]北京交通大学电子信息工程学院,北京100044 [3]北京交通大学轨道交通控制与安全国家重点实验室,北京100044

出　　处：《交通运输系统工程与信息》2016年第1期71-77,84,共8页Journal of Transportation Systems Engineering and Information Technology

基　　金：国家自然科学基金(U1334202);教育部科学技术研究重大项目(313006);铁道部科技研究开发计划项目(J2013C019;2014X006)~~

摘　　要：在铁路专用移动通信网场强测量中,检波方式将决定场强测量结果的准确性.常用检波方式有正峰值检波、均值检波和有效值检波.铁路数字移动通信系统(GSM-R)场强测量标准采用正峰值检波,而在实际运营中,场强测量的结果与通信系统实际应用效果存在一定差异,进而影响了通信系统的实际性能.本文主要研究了场强测量接收机及不同检波器的工作机理,根据数学描述建立了不同检波方式的模型,设计了实验室静态环境和现场动态环境下验证不同检波方式的测量方法,并进行了测量,对不同检波方式测量的数据进行对比分析.分析结果表明,有效值检波更适合GSM-R场强测量.In the field strength measurement of railway dedicate mobile communication network, the selection of detection mode determines accuracy of measurement results. The detectors available are the max peak, the average and the RMS detector. The max peak detection is applied in the standards of railway digital mobile communication system （GSM-R） field strength measurement. This paper investigates the difference between the field measurement results and practical application effect of communication system in railway operation which affects the actual performance of the communication system. We mainly study the working mechanism of field strength measurement receiver and different detector, and propose the detection model according to the mathematical description. Then the field strength measurement methodology for the verification of different detection is designed in the laboratory static scenario and railway field dynamic scenario. At last the measurements are carried out and the data of different detection modes are compared and analyzed. The analysis result shows that the RMS detection is more suitable for GSM-R field strength measurement.

关 键 词：信息技术 有效值检波 场强测量 铁路专用移动通信 检波方式 

分 类 号：TN929.5[电子电信—通信与信息系统] U285.21[电子电信—信息与通信工程]