短距离D2D无线通信最优功率分配方法研究  

Research on optimal power allocation method for short distance D2D wireless communication

作　　者：陈家璘 孙志峰 曾铮 隋璐捷 汪龙志 CHEN Jialin;sUN Zhifeng;ZENG Zheng;sUI Lujie;WANG Longzhi(Information&Communication Branch of state Grid Hubei Electric Power Company,Wuhan 430077,China)

机构地区：[1]国网湖北信通公司,武汉430077

出　　处：《自动化与仪器仪表》2022年第10期46-50,共5页Automation & Instrumentation

基　　金：国网湖北信通公司(52153318004J)项目名称:基于图模数一体化及大数据技术的通信立体式全网络拓扑图的网络综合监视与预警分析。

摘　　要：异构网络是网络领域未来主要发展趋势之一,短距离通信在其中占据着至关重要的位置,尤其是D2D无线通信技术。随着D2D用户数据的暴增,无线通信功率分配遇到了极大的挑战,提出短距离D2D无线通信最优功率分配方法研究。构建短距离D2D无线通信模型与信道模型,以此为基础,获取信道状态信息(信道矩阵与瞬时信道系数),预编码D2D无线通信信号,以预编码后的短距离D2D无线通信信号为依据,构造无线通信功率分配目标函数,添加功率分配决策空间边界门限条件,应用拉格朗日对偶法求解目标函数,即可获得最优的无线通信功率分配结果。实验数据显示:应用提出方法获得的最优功率分配决策求解迭代次数均在6次以下,接收信噪比数值平均为64 dB,无线资源利用率数值平均为76%,总移动服务量最高达到了10 000 bits/Hz,充分证实了提出方法具有更好的功率分配性能。Heterogeneous network is one of the main development trends in the network field in the future,in which short-range communication occupies a crucial position,especially D2D wireless communication technology.With the explosion of D2D user data,wireless communication power allocation has encountered great challenges.The research on the optimal power allocation method of short-range D2D wireless communication is proposed.The short-range D2D wireless communication model and channel model are constructed.On this basis,the channel state information(channel matrix and instantaneous channel coefficient)is obtained,and the D2D wireless communication signal is precoded.Based on the precoded short-range D2D wireless communication signal,the wireless communication power allocation objective function is constructed,and the boundary threshold condition of power allocation decision space is added,Using Lagrange dual method to solve the objective function,the optimal wireless communication power allocation result can be obtained.The experimental data show that the it-eration times of the optimal power allocation decision obtained by the proposed method are all less than 6 times,the average value of received signal-to-noise ratio is 64dB,the average value of wireless resource utilization is 76%,and the maximum mobile service volume is 10000bits/Hz,which fully proves that the proposed method has better power allocation performance.

关 键 词：D2D通信技术 短距离 功率分配 最优化决策 无线通信 资源分配 

分 类 号：TP39[自动化与计算机技术—计算机应用技术] TN92[自动化与计算机技术—计算机科学与技术]