Mobile Communication Doppler Frequency Shift and High-speed Railway Coverage Technology
SU Hua-hong · 2009
Doppler frequency shift is actually spread spectrum,equal to fading channel.It limits low-rate data transport. 2G and 3G system can resist Doppler frequency shift when the speed of the train is less than 500 km/h.The major factor which effects communication is fast Rayleigh Fading.