Multi-dimensional adaptation and multi-user scheduling techniques for wireless OFDM systems
Multi-dimensional adaptation and multi-user scheduling techniques for wireless OFDM systems
复制标题
无线正交频分复用系统的多维自适应和多用户调度技术
DOI：
10.1109/icc.2003.1204066
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Baum
中科院分区：
文献类型：
--
作者：
B. Classon;P. Sartori;V. Nangia;Xiangyang Zhuang;K. Baum
本文研究了通过在时间域和频域自适应来提高宽带无线ofdm系统性能的技术。提供了单天线、Alamti和选择性闭环MIMO配置的频率非选择性编码和频率选择性编码的系统吞吐量估计。通过使用比例、公平和最大C/I调度器来实现和确定执行多用户频域调度的附加收益。将多维自适应和调度技术的性能收益与所需的反馈量进行对比。来自20 MHz实验系统的测量数据和Turbo编码仿真被用来估计每个反馈报告的大小，并且被接受的用户速度分布被用来估计适当的反馈速率。
This paper considers techniques to increase the performance of the broadband wireless OFDM system through adaptation in both the time and frequency domains. System throughput estimates are provided for frequency non-selective coding and frequency selective coding for single antenna, Alamouti, and selective closed-loop MIMO configurations. Additional gains from performing multi-user frequency-domain scheduling are achieved and determined using proportional fair and maximum C/I schedulers. The performance gains of multi-dimensional adaptation and scheduling techniques are contrasted with the amount of feedback required. Measured data from a 20 MHz experimental system and turbo coding simulations are used to estimate the size of each feedback report, and an accepted user speed distribution is used to estimate an appropriate feedback rate.