Is the effect significant? Is it useful or not? Is there really any effect in the received datarate? Are there effects in other forms of mobile communication?
Dear Inbaraj Anbalagan, The classical Doppler model does not provide a satisfactory geometric model for this type of scattering. Instead, multipath energy is more likely to have a narrow Doppler spread, having arisen from reflections off isolated obstacles such as buildings or hills.
Doppler effect is due to mobile moving speed. The higher the speed, higher is the carrier frequency shift. This is serious if bandwidth is large. Therefore, high data rates and high speed of vehicle will not go together.
At very high vehicle speed, modulation level drops and hence data rates. A trade-off is made between vehicle speed and data rate.