无线携能通信系统能量获取研究

Study on Energy Harvesting in Simultaneous Wireless Information and Power Transmission Network

本文首先概述了无线携能通信技术的重要意义及发展前景,进而构建了无线携能通信系统的重要架构,并针对该系统中能量获取的问题,提出一种最大化获取能量的方法并针对此方法建立数学模型,由于该模型是非凸优化的且在数学上很难直接求解,因此将利用半定松弛方法将其转化为可解的凸优化问题。最后将此方法运用Matlab仿真实现,验证多输入单输出(MISO)系统的优越性,并得出接收端所获取的能量随发送端天线数量的增加而增大的结论。

This paper firstly introduces the meaning and prospects of simultaneous wireless information and power transmission network （SWIPT）. And then designs the model of SWlPT system. For problem of optimizing harvested energy, we point out a method of optimizing harvested energy and build the related model. Due to this model is a non-convex problem and is hard to be solved, we transforms it into a solvable convex problem by semi-definite program （SDP）. Finally, we use the Matlab software to simulate and verify that MISO system has a better performance. In addition, we conclude that with the increasing number of antennas, the energy receiver can harvest more energy.