Research on Anti-Interference of Double Hop Wireless Powered Communication Networks based on Time Reversal

Abstract

To solve the problems of dual near and far in wireless powered communication network(WPCN) and the interference in the process of information transmission, a resource allocation method based on time inversal (TR) for WPCN is proposed. An optimization problem to maximize the minimum network throughput is constructed by jointly optimizing the transmission time of each phase of the network, the transmission power of the hybrid access point (HAP) and the transmission power of the relay. Since the constructed problem is non-convex, this paper converts the non-convex problem into an equivalent convex problem by introducing relaxation variables and auxiliary variables, and further divides the convex problem into two sub-problems to obtain the solution of the original problem. Finally, the simulation results show that the proposed resource allocation scheme can alleviate the dual distance and interference effectively, so as to obtain a higher total system throughput.