一种低复杂度MIMO-OFDMA系统的自适应子载波分配算法  

A Low Complexity Adaptive Subcarrier Allocation Algorithm In MIMO-OFDMA System

作　　者：戴志超[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《信息通信》2007年第1期39-42,共4页Information & Communications

摘　　要：本篇论文提出一种多用户多输入多输出正交频分复用系统(MIMO-OFDMA)下行链路具有信道变化实时性的动态子载波分配算法。文中采用奇异置分解,将每个子载波的MIMO衰落信道分解为独立的并行子信道,利用子信道通对各子载波容量的求解推导出本文算法。此次优的算法在满足各个用户数据速率和BER要求的同时,能减小发射功率。仿真结果也证明了这一点。In this paper, I propose an adaptive subcarrier, bit, and power allocation algorithm for the downlink MIMO-OFDMA system. Use the singular value decomposition, the MIMO fading channel of each subcarrier is transformed into an equivalent bank of parallel SISO sub-channels. Calculating the capacity of each subcarrier of each subchannel, I conclude this sub-optimal algorithm. This algorithm can meet with the desire of bit rate and BER of every user and decrease the power, The simulation also proves this conclusion above.

关 键 词：MIMO—OFDMA 自适应子载波分配 最小化发射功率 容量 

分 类 号：TN914[电子电信—通信与信息系统]