On channel estimation in hybrid broadcasting and cellular networks with high mobility

With the explosive growth of mobile Internet services, traditional wireless communication networks cannot meet the increasing demand of users. Broadband communication in high mobility scenarios leads to time-frequency doubly selective channels, and transmission throughput is even worse for the users on high speed trains. In this work, we propose a hybrid broadcasting and cellular network system for high speed railways. The converged broadcasting network and cellular network can transmit data cooperatively. We propose a pilot-aided channel estimation method based on time-frequency interpolation (TFI) and evaluate its performance by comparing it with other channel estimation methods. Numerical results are provided to substantiate our study.