解码转发全双工中继网络的能效谱效均衡  

Trade-off between energy efficiency and spectrum efficiency for decode-and-forward full-duplex relay network

作　　者：张茜 仇润鹤[1,2] ZHANG Qian;QIU Runhe(College of Information Science and Technology,Donghua University,Shanghai 201620,China;Engineering Research Center of Digitalized Textile and Apparel Technology,Ministry of Education(Donghua University),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(东华大学),上海201620

出　　处：《计算机应用》2023年第10期3188-3194,共7页journal of Computer Applications

基　　金：上海市自然科学基金资助项目(20ZR1400700)。

摘　　要：为优化解码转发(DF)全双工中继网络的能量效率(EE)与频谱效率(SE),提出一种DF全双工中继网络的EE和SE的均衡方法。在全双工中继网络中,首先,以提高网络的SE为目标来优化网络的EE,并结合求导和牛顿‒拉弗森方法得到中继的最优功率,进而给出目标函数的帕累托最优集;然后,通过加权标量法引入均衡因子,构建一个EE和SE的折中优化函数,通过归一化将EE最优化和SE最优化这一多目标优化问题转化为单目标的能量‒频谱效率的优化问题,并分析不同均衡因子下的EE、SE和折中优化的性能。仿真实验结果表明,相较于全双工‒最优功率方法、半双工‒最佳中继最优功率分配方法,所提方法的SE和EE在相同数据传输速率下更高;通过调整不同均衡因子,可以实现EE和SE的最优均衡与优化。In order to optimize the Energy Efficiency(EE)and Spectrum Efficiency(SE)of Decode-and-Forward(DF)full-duplex relay network,a trade-off method of EE and SE for DF full-duplex relay network was proposed.In full-duplex relay network,firstly,the EE of the network was optimized with the goal of improving the SE of the network.And the optimal power of the relay was obtained by combining the derivation and the Newton-Raphson method,then the Pareto optimal set of the objective function was given.Secondly,a trade-off factor was introduced through the weighted scalar method,a trade-off optimization function of EE and SE was constructed,and the multi-objective optimization problem of EE optimization and SE optimization was transformed into a single-objective energy-spectrum efficiency optimization problem by using normalization.At the same time,the performance of EE,SE and trade-off optimization under different trade-off factor was analyzed.Simulation results show that the SE and EE of the proposed method are higher at the same data transmission rate compared with the those of the full-duplex-optimal power method and the half-duplex-optimal relay-optimal power allocation method.By adjusting different trade-off factors,the optimal trade-off and the optimization of EE and SE can be achieved.

关 键 词：全双工 解码转发 能量效率 频谱效率 均衡因子 

分 类 号：TN925[电子电信—通信与信息系统]