SCMA系统中一种新节能资源分配算法  

A novel energy-saving resource allocation algorithm of SCMA systems

作　　者：张鹏举 葛文萍[1] 张永星 高梦瑶 ZHANG Pengju;GE Wenping;ZHANG Yongxing;GAO Mengyao(College of Information Science and Engineering,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学信息科学与工程学院,乌鲁木齐830046

出　　处：《激光杂志》2020年第6期106-110,共5页Laser Journal

基　　金：新疆维吾尔自治区自然科学基金(No.2018D01C033)。

摘　　要：随着移动网络的快速更新换代,无线通信系统的能耗急剧增加,考虑一种稀疏码多址接入(Sparse Code Multiple Access,SCMA)下行链路系统的节能策略,通过联合优化功率分配及子载波资源分配算法来最小化系统总功耗。由于该问题是一个非凸规划问题,很难求解,首先通过松弛整数和拉格朗日对偶分解将功率分配问题转化为一个标准的凸优化问题,然后综合考虑用户的特征,提出一种快速搜索算法对子载波进行分配。仿真结果和理论分析表明,所提出的联合功率分配及子载波资源分配算法可以有效地降低下行链路系统传输功耗和保证较好的用户公平性。With rapid upgrading of mobile networks,the energy consumption of wireless communication systems has increased dramatically.We consider a sparse code multiple access(SCMA)downlink system energy-saving strategy to minimize the total system power consumption by jointly optimizing power allocation and sub-carrier resource allocation algorithms.In this system,the problem is a non-convex programming problem,which is hard to solve.To make it traceable,we first transform the power allocation problem into a standard convex optimization problem by using the relaxation integer and Lagrange dual decomposition.Furthermore,considering the characteristics of users,a fast search algorithm is proposed to allocate sub-carriers.Simulation results and theoretical analysis show that the proposed joint power allocation and sub-carrier resource allocation algorithm can effectively reduce the transmission power consumption of the downlink system and the user fairness can be also be guaranteed.

关 键 词：稀疏码多址接入 资源分配 功率分配 快速搜索算法 

分 类 号：TN929.5[电子电信—通信与信息系统]