The train-groundradio communication system of Maglev trains is the information exchange channel for trains and the ground control center.
磁浮列车车地无线电通信系统则是列车与地面控制中心进行信息交换的通道。
2
The statistic model of air-groundradio communication channel is characterized by the multipath fading, Doppler power spectrum and delay power spectrum.
空地通信信道的主要统计特性包括多径衰落特性、多普勒功率谱和时延功率谱。
3
He warned that traditional media - television, radio and newspapers - are losing ground.