Spatial consistency of dominant components between ray-tracing and stochastic modeling in 3GPP high-speed train scenarios

In reality, the dominant components (the specular rays with larger power) of wireless channels should be contiguous and smoothly changing over positions. However, such spatial consistency cannot be guaranteed if the channel is modeled in a purely stochastic way. In this paper, through two series of simulations, we study the spatial consistency of dominant components between ray-tracing and stochastic modeling in the 3GPP high-speed train scenarios. The results imphes that the geometry near transmitter and receiver is the main influence of the dominant components. Thus, it makes sense to include ray-tracing into the standardized channel modeling approaches in order to keep spatial consistency of the channel and avoid the uncertainty of the rehabihty of the performance evaluation due to false stochasticity.