Research on the optimization algorithm for UAV-aided wireless-powered communication systems
The resource allocation optimization scheme for a UAV-aided wireless-powered communica-tion system is studied,in which a UAV emits RF signals,and a ground node equipped with an energy harvesting circuit harvests energy from the RF signals and consumes the harvested energy to send a certain amount of data to the UAV.For this system,by jointly optimizing the energy transmission in-terval,information transmission interval,and the flight speed and time of the UAV in these two inter-vals,the UAV flight time is minimized under the condition of meeting the constraints of UAV data col-lection.The established optimization problem is a non-convex optimization problem that is difficult to solve.In order to solve this problem,it is decomposed into two tractable subproblems corresponding to the energy transmission interval and the information transmission interval.By employing the iterative optimization method to solve the two subproblems,an efficient system optimization algorithm is pro-posed.Simulation results show that as compared with the existing baseline schemes,the proposed scheme can significantly reduce the UAV flight time for the UAV-aided wireless-powered communica-tion system.