一种下行OFDM-SDMA系统资源分配算法  

A Resource Allocation Algorithm for Downlink OFDM-SDMA Systems

作　　者：任参军[1] 陈明[1] 

机构地区：[1]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》2010年第7期64-66,73,共4页Communications Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(批准号:2007AA01Z207)

摘　　要：研究了OFDM-SDMA系统中的资源分配算法问题,针对已有算法的不足,提出了一种新的多用户调度指标,并在此基础上提出了次优多用户调度算法。针对整数比特约束,采用了两种合适的资源分配方案。由于新指标充分考虑了被调度用户之间的空间兼容性和信道质量,仿真结果证明所提算法可以获得较好的性能增益,且资源分配算法的收敛速度较快。Multi-user scheduling algorithm for downlink MIMO-OFDM system is studied.Aiming at the deficiency of previous algorithm,a new efficient multi-user scheduling index is proposed,based on which a sub-optimal scheduling algorithm is put forward.In the light of integral bit constraint,two proper resource allocation schemes are introduced.The simulation results indicate that,owing to the full consideration of the trade off between spatial compatibility and channel quality,by the new index,the proposed algorithms could achieve better performance gain and faster convergence.

关 键 词：OFDM-SDMA 多用户调度 自适应功率比特分配 

分 类 号：TN929.3[电子电信—通信与信息系统]