单用户电力线通信自适应OFDM系统的资源分配  

Resource allocation for single user in power line communication adaptive OFDM systems

作　　者：方拥军[1] 徐志强[2] 翟明岳[2] 

机构地区：[1]南华大学资产管理处,湖南衡阳421001 [2]华北电力大学电气与电子工程学院,北京102206

出　　处：《电力系统保护与控制》2010年第4期6-10,共5页Power System Protection and Control

基　　金：国家自然科学基金资助项目(60402004);教育部重点资助项目(105050)~~

摘　　要：分析了电力线通信自适应OFDM系统在每OFDM符号内的总比特数、各子载波上的最大功率和比特数约束下,单用户在多子载波上功率自适应的资源分配模型,探讨了其发射总功率最小的最优分配准则,提出了一种基于最优分配准则的单用户功率自适应的资源分配和调整算法,其组成可分为资源预分配、约束调整和交换调整。在典型电力线环境下仿真结果表明,所提算法性能与改进的位添加查表算法性能相当,接近位添加法;而其运算复杂度低于改进的位添加查表算法,远小于位添加法。The power adaptive resource allocation model for single user in multi-carriers is analyzed with the restrictions of total bits for each OFDM symbol and maximal power and bits for every sub-carrier in power line communication adaptive OFDM systems. The optimal allocation rule for minimal emission power is discussed and a power adaptive resource allocation and adjustment algorithm based on the optimal allocation rule for single user is proposed, which is composed of resource pre-allocation, restriction adjustment and swap adjustment. The algorithm is tested in typical power line channel environment and the simulation results indicate that it has almost the same performances as the reformative bit adding finding table algorithm and bit adding algorithm, but its implementation complexity is lower than the reformative bit adding finding table algorithm and largely lower than the bit adding algorithm.

关 键 词：电力线通信 自适应OFDM 最优分配准则 资源调整 位添加 

分 类 号：TM73[电气工程—电力系统及自动化] TN913[电子电信—通信与信息系统]