一种多用户MIMO-OFDM系统中的天线与子载波分配算法  

An Antenna and Subcarrier Allocation Algorithm for Multiuser MIMO-OFDM Systems

作　　者：马月槐[1] 蔡跃明 徐友云[1] 

机构地区：[1]解放军理工大学通信工程学院

出　　处：《信号处理》2008年第1期40-44,共5页Journal of Signal Processing

基　　金：江苏自然科学基金(BK2006701);国家自然科学基金(No．60672079)

摘　　要：天线与子载波分配是多用户MIMO-OFDM系统无线资源管理中的重要内容。在分析了多用户MIMO-OFDM系统下行链路中最优天线与子载波分配算法的基础上,提出了一种次优的低复杂度天线与子载波分配算法。该算法通过先选择天线再选择用户从而避免了最优算法中的遍历搜索。仿真结果表明,在运算量大大降低的情况下,所提算法获得的系统最大容量和最优算法所获得的最大容量相比相差不大,而且空间和频率联合优化的结果使其性能远远优于仅在MIMO环境下进行子载波分配的算法。Allocation of antennas and subcarriers is one of most important issue for multiuser MIMO-OFDM system radio resource management. In this paper, based on the analysis of optimal antenna and subcarrier allocation algorithm in MIMO-OFDM downlink, a suboptimal antenna and subcarrier allocation algorithm with less complexity is proposed. The algorithm avoid exhaustive search through select antenna first and select user after that. Numerical results show that there is only a little performance deterioration in maximum capacity with the proposed algorithm,and superior than algorithm with only subcarrier allocation in MIMO environment because of the combined optimization of space and frequency.

关 键 词：MIMO-OFDM系统 天线与子载波分配 多用户分集 

分 类 号：TN929.5[电子电信—通信与信息系统] TN929.533[电子电信—信息与通信工程]