基于功率分割能量收集的全双工中继网络的能效优化  

Energy Efficiency Optimization of Full-Duplex Relay Network Based on Power-Splitting Energy Harvesting

作　　者：潘兴芬 仇润鹤[1,2] PAN Xingfen;QIU Runhe(College of Information Sciences and Technology,Donghua University,Shanghai 201620,China;Engineering Research Center of Digitized Textile&Apparel Technology,Ministry of Education,Shanghai 201620,China)

机构地区：[1]东华大学信息科学与技术学院,上海201620 [2]数字化纺织服装技术教育部工程研究中心,上海201620

出　　处：《通信技术》2023年第6期719-727,共9页Communications Technology

基　　金：上海市自然科学基金(20ZR1400700)。

摘　　要：针对全双工放大转发中继网络的能效提高问题,提出了一种基于功率分割能量收集的全双工中继网络的能效优化方法。该全双工中继网络的中继节点采用功率分割方式进行非线性能量收集,在非完美信道下,将非凸的能效问题转化为最小能量消耗问题,进一步转化为优化发射功率和传输时间两个子问题。根据信道容量得到最优传输速率,通过vpasolve函数求出最优传输速率和功率分割因子,再利用香农公式求最优传输时间,最终得到能效的最优解。仿真表明,所提方法的能效比仅优化传输速率和传输时间的能效分别提升约13.07%、8.48%,比单向全双工放大转发的能效提升约28.59%。Aiming at the problem of improving the energy efficiency of full-duplex amplifying and forwarding relay networks,an energy efficiency optimization method for full-duplex relay networks based on power-splitting energy harvesting is proposed.The relay nodes of the full-duplex relay network adopt the power-splitting method for nonlinear energy harvesting,which transforms the non-convex energy efficiency problem into the minimum energy consumption problem under the non-perfect channel,and the problem would be further transformed into two sub-problems of optimizing the transmission power and the transmission time.The optimal transmission power is obtained according to the channel capacity,the optimal transmission rate and power splitting factor are derived through the vpasolve function,then the Shannon formula is used to find the optimal transmission time,and finally,the optimal solution for energy efficiency is obtained.Simulation results indicate that the energy efficiency of the proposed method is improved by about 13.07%and 8.48%higher than that of optimizing the transmission rate only and the transmission time only,respectively,and by about 28.59%higher than that of one-way full-duplex amplifying and forwarding.

关 键 词：全双工 放大转发 非线性能量收集 功率分割 能效优化 

分 类 号：TN925[电子电信—通信与信息系统]