摘要
研究目的:郑州—西安客运专线采用GSM-R移动通信系统,由于该系统承载列控信号,又是在高速条件下运行,为避免多普勒效应和电磁干扰对列控信号传输的影响,实现GSM-R系统的网络覆盖,保证列控系统和铁路的正常运营,需对系统传输所引起的损伤进行研究,达到提高GSM-R网络为铁路运输服务的可靠性。研究结论:通过对建立传播模型进行的分析和对实际路测数据进行的拟合得出:传播损耗随着频率的升高、距离的增加、建筑物密度的增大而增大;参数越多拟合的效果越好,但计算机拟合的时间越长。故在无线设计中,选择合适的传输模型和在拟合过程中合理选择参数的个数,可以得到较好的效果。也为GSM-R移动通信系统的建模和设计提供了一定的依据。
Research purposes： GSM - R system is adopted in Zhengzhou -Xi＇an special railway for passenger transport. Because controlling signals are carried out and being used on high - speed condition, also in order to avoid Doppler effect and effects caused by electromagnetic on the controlling GSM - R system, ensure the railway train controlling system and be made on the losses which is caused by system transmission , railway transmission service. signals transmission, achieve the network coverage of the normal operations of railway, so the research should in order to improve GSM -R networklreliability for the Research conclusions： The results come from analysis of the establishment of communication model and fitting of measurement of the actual road data：With the frequency increases, the distance increases, building density increases, the transmission losses will increase. From the computer fitting results, the number of fitting parameters is more, the effect is better, but the computer fitting time is longer. So in the design of wireless communications, it is better to get a good result on selecting the appropriate transmission model and choosing the appropriate numbers of fitting parameters. It also provides a basis for modeling and design of GSM - R.
出处
《铁道工程学报》
EI
北大核心
2008年第10期50-52,62,共4页
Journal of Railway Engineering Society
