摘要
高铁场景由于高铁列车高速移动特性,容易导致频繁的切换,增大多普勒频移发生的概率,抬升误码率,降低网络解调性能。同时,高铁车体穿透损耗过大,不同车体的穿透损耗存在较大差异性,产生过多的掉话/掉线等问题,影响用户感知。因此,通过研究高铁覆盖技术、基站布局合理性、优化流程、参数设置等优化方案解决上述问题。
Because of the characteristics of the high-speed mobility on the high-speed railway, it happens frequent switching easily, increases the probability of the doppler shift phenomenon, raises the BER, reduces network demodulation performance. And penetration loss is too large, also a big difference among different railway-car body penetration-loss, which results too many drop calls and other problems, affecting user＇s perception.
出处
《互联网天地》
2013年第5期32-36,共5页
China Internet
关键词
高铁
多普勒频移
误码率
高铁覆盖技术
基站布局合理性
优化流程
参数设置
high-speed rail,doppler shift, BER,high-speed rail covering technology, rationality of base station layout,optimization process, parameter setting
