摘要
针对无线通信能量受限设备安全问题,提出了采用时间反演和人工噪声的无线协能传输方案(time inversion and artificial noise simultaneous wireless information and power transmission ,TRAN-SWIPT),来提高能量受限无线供电网络的保密性能。该方案在多天线源处应用时间反演(time reversal,TR)技术,利用TR技术的空时聚焦性,使得无线信号聚焦到目的地,增大无线能量收集;此外,在能量受限的目的地采用能量收集和自干扰人工噪声操作,以延长设备使用寿命以及混淆窃听者;最后,通过李雅普洛夫(Lyapunov)算法优化时间分配因子、发送端发送功率和自干扰人工噪声发送功率使保密速率达到最大。通过理论分析与仿真证明了所提方案的能效性与保密性。
Aiming at the security problem of energy-constrained devices in wireless communication, a time reversal (TR) and artificial noise wireless cooperative energy transmission scheme is proposed to improve the security performance of the energy-constrained wireless power supply network. The scheme uses the TR technology at multi-antenna sources, makes use of the time and space focusing of the TR technology to focus the wireless signal to the destination and increases the wireless energy collection. In addition, the energy collection and self-jamming artificial noise operation are used in energy-constrained destinations to prolong the service life of the equipment and confuse eavesdroppers. Finally, the Lyapunov algorithm is used to optimize the time allocation factor. The transmission power of sub, sender and self-interference artificial noise makes the secret rate reach the maximum. The theoretical analysis and simulations prove the energy efficiency and confidentiality of the proposed scheme.
作者
朱江
汪智豪
ZHU Jiang;WANG Zhihao(School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2019年第12期2879-2884,共6页
Systems Engineering and Electronics
基金
国家自然科学基金(61771084)资助课题
关键词
能量收集
保密速率
李雅普洛夫
空时聚焦
energy harvesting
confidentiality rate
Lyapulov
spatial and temporal focusing
