多用户电力通信OFDMA-SDMA系统下行链路的资源分配  

Resource Allocation Scheme for Multi-User Power Communication OFDMA-SDMA Downlink

作　　者：徐志强[1] 翟明岳[1] 赵宇明[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]清华大学深圳研究生院能源与电工研究所,深圳518055

出　　处：《北京邮电大学学报》2009年第2期123-127,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60402004);教育部科学技术研究重点项目(105050)

摘　　要：研究了电力通信正交频分多址-空分多址(OFDMA-SDMA)系统在每正交频分复用(OFDM)符号内各用户要求在比特数、各子信道功率上限和特定比特数约束下的多用户在其下行链路中的资源分配模型.提出一种基于用户空间正交性和优先级的逐比特查表加载和交换调整的功率自适应动态资源分配算法.在电力专用的无线通信环境下对算法进行了仿真.结果表明,新算法在保障用户服务质量的同时,有效地提高了资源的利用率,而且兼顾了一定的公平性.The resource allocation model for downlink multi-user power communication orthogonal frequency division multiple access spatial division multiple access （OFDMA-SDMA） system is studied with the restrictions of requirement bit number for each user and power upper limit as well as specifically bit number for every subchannel in every orthogonal frequency division multiple （OFDM） symbol. An algorithm for power adaptation resource dynamic allocation with bit-loading seeking table and exchanging adjustment is proposed based on user spatial orthogonality and priority. Simulation shows the proposed algorithms in power special wireless communication environment, and indicates that the proposal improves spectral efficiency significantly while maintaining quality of service guarantees and certain fairness.

关 键 词：电力通信 正交频分多址-空分多址 资源分配 优先级 交换调整 

分 类 号：TN929.53[电子电信—通信与信息系统]