一种功率最小化的双层迭代子载波分配算法  

Two-Level Iterative Subcarrier Allocation Algorithm for Power Minimization

作　　者：孟超 李孜恒 戴西 王刚[2] MENG Chao;LI Zi-heng;DAI Xi;WANG Gang(School of Networks and Telecommunications Engineering,Jinling Institute of Technology,Nanjing Jiangsu 211169,China;National Mobile Communications Research Laboratory,Southeast University,Nanjing Jiangsu 210096,China)

机构地区：[1]金陵科技学院网络与通信工程学院,江苏南京211169 [2]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《通信技术》2020年第1期20-23,共4页Communications Technology

基　　金：江苏省高校自然科学研究面上项目（No.16KJB510011）;金陵科技学院高层次人才科研启动项目（No.40620044）~~

摘　　要：研究OFDM下行链路通信系统中关于子载波和对应功率分配的功率消耗问题。在满足用户最小速率和子载波约束的条件下,形成了关于系统功率消耗最小化的混合优化问题。通过变量代换,将原始问题转化为只与子载波分配有关的整数优化问题。在此基础上,提出了一种功率最小化的双层迭代子载波分配算法,每次内部迭代求解两个用户的局部最优值,外部迭代判断收敛停止条件,最后通过数值仿真验证了所提算法的有效性。The power consumption of subcarriers and corresponding power allocation in OFDM downlink communication systems is explored.Under the condition of satisfying the minimum user rate and subcarrier constraints,a hybrid optimization problem with regard to minimizing system power consumption is formed.Through variable substitution,the original problem is transformed into an integer optimization problem related to subcarrier allocation only.Based on this,a two-level iterative subcarrier allocation algorithm with power minimization is proposed.Internal iterations are performed to solve the local optimal values of two users each time,and external iterations are used to determine the stopping conditions for convergence.Finally,the effectiveness of the proposed algorithm is verified by numerical simulation.

关 键 词：子载波 功率消耗 混合优化 整数优化 双层迭代 

分 类 号：TN92[电子电信—通信与信息系统]