摘要
移动通信网络中,高速移动网络一直是个难解决的课题,高速移动会带来很强的多普勒效应,产生较强的快衰落特性,对网络各项关键绩效指标(KPI)产生严重影响,严重时会导致用户无法使用移动网络。高速铁路时速较快,多普勒移频较大,大的频移特性给高铁网络优化带来很大的麻烦。这里先分析多普勒效应基本概念,接着讨论了多普勒频移对网络产生的影响,再介绍了克服多普勒效应的方法和算法,最后从站址选择上提出现网中应该注意的地方。
In the mobile communication network,it＇s a hard to solve high-speed mobiling of the network,and thus problem always attracts much attention.High-speed mobiling would bring strong Doppler effect,and thus result in fast fading characteristics and serious impact on KPI,or even on network operation.High-speed rail is known for its high speed,and Doppler frequency shift brings much trouble to the high-speed rail network.This paper first analyzes the basic concept of the Doppler effect,then discusses its impact on mobile network and the method and algorithm for overcoming this effect,and finally gives suggestions in site selection for reducing the Doppler effect.
出处
《通信技术》
2012年第3期57-59,共3页
Communications Technology
