【摘要】 为了提高信息与能量协同传输系统的安全传输性能,提出一种基于功率分配协作干扰的无线信息与能量安全协同传输方法.该方法中包含一个信息发送端和信息接收端以及一个能量接收器和干扰器.由于能量接收器离信息发送端较近,很容易窃听信息发送端的信息.在接收到来自信息发送端的信息后,能量接收器利用一部分接收到的功率进行能量接收,利用另外一部分功率进行信息解码,窃听信息发送端的信息.为了保证信息发送端到接收端信息的安全传输,干扰器使用其中一根天线对来自信息发送端的信号进行能量接收,利用接收到的能量使用另一根天线发射干扰信号,对能量接收器进行信息干扰.研究该方法中如何对功率进行分配,保证能量接收器收到的能量达到要求的条件下最大化信息接收端的保密信息速率.仿真结果表明,该方法能有效提高信息与能量协同传输系统的安全性能.更多还原

【Abstract】 To improve the secure transmission performance for simultaneous information and energy cooperative transmission system,apower splitting cooperative jamming based secure simultaneous wireless information and power transfer method is proposed in this paper.In the proposed method,the system includes an information transmitter,an information receiver,an energy receiver and a jammer.Due to the energy receiver is close to the information transmitter,it is easy to eavesdrop the information of the transmitter.After receiving the information sent from the information transmitter,the energy receiver utilizes a fraction of the received power to perform energy harvesting,and utilizes the remained fraction of the power to perform information decoding to eavesdrop the information from the information transmitter.To ensure secure transmission between the information transmitterand the information receiver,the jammer uses one of the antennas to perform energy harvesting from the signal sent from the information transmitter,and uses another antenna to send interference signal to interfere the energy receiver with the harvested power.We study how to allocate the power in the proposed method,such that the secrecy transmission rate of the information receiver is maximized under the condition that the energy harvester can harvest the required energy.Simulation results demonstrate that our proposed method can effectively improve the security performance of simultaneous wireless information and power transfer system.更多还原