时间受限下无人机无线携能传输效用最大化研究

Research on Utility Maximization of Simultaneous Wireless Information and Power Transfer for UAV Communications Systems

由于无人机机动灵活且可以与地面用户之间保持较好的视距传输条件,因此近年来无人机在通信领域的作用越来越重要。针对物联网设备电池容量有限且充电不便的情况,将无人机无线携能传输技术应用到物联网系统中,可以实现能量和数据的同时传输。为了评估时间受限下无线携能传输的效果,引入效用值的概念,设计了一个全新的效用函数,并提出了无人机发射功率和飞行轨迹联合优化算法。仿真结果表明,联合优化算法能够有效提高系统效用值。

Since UAVs are flexible and can maintain good LOS channel with ground users, in recent years, UAVs have played an increasingly important role in the communication field. Aiming at the problem of the limited battery capacity and inconvenient charging of Internet of Things devices(IoTDs), the application of simultaneous wireless information and power transfer(SWIPT) for UAV communications to the IoT system can realize the simultaneous transmission of energy and data. In order to evaluate the effect of SWIPT under time constraints, the concept of utility value is introduced, a new utility function is designed, and a joint optimization algorithm for UAV transmission power and flight trajectory is proposed. The simulation results indicate that the joint optimization algorithm can effectively improve the system utility value.