| 一种多用户MIMO/OFDM下行链路保障QoS的自适应传输机制 |
| |
| 引用本文： | 韩锋, 刘应状, 朱光喜, 卢小峰. 一种多用户MIMO/OFDM下行链路保障QoS的自适应传输机制[J]. 电子与信息学报, 2008, 30(7): 1540-1543. doi: 10.3724/SP.J.1146.2006.01939 |
| |
| 作者姓名： | 韩锋 刘应状 朱光喜 卢小峰 |
| |
| 作者单位： | 华中科技大学电信系,武汉,430074 |
| |
| 基金项目： | 国家自然科学基金 , 国家高技术研究发展计划(863计划) |
| |
| 摘 要： | 在用户QoS参数限制下,该文提出一种在多用户MIMO/OFDM下行链路使系统总速率最大的资源分配机制。基站应用空分多址接入,使得每个子载波可支持多个用户,应用线性预编码方法抵消用户间的干扰,提出保障QoS的自适应功率、比特分配方案。该文并提出两种可应用到实际系统的低复杂度的比特加载和比特去除算法,仿真结果表明,该两种方法性能可非常接近最优遍历算法。
|
| 关 键 词： | 多输入多输出/正交频分复用 资源分配 服务质量 |
| 收稿时间： | 2006-12-07 |
| 修稿时间： | 2007-06-04 |
An Adaptive Scheme with Guaranteed QoS for Multiuser MIMO/OFDM Downlink |
| |
| Han Feng, Liu Ying-zhuang, Zhu Guang-xi, Lu Xiao-feng . An Adaptive Scheme with Guaranteed QoS for Multiuser MIMO/OFDM Downlink[J]. Journal of Electronics & Information Technology, 2008, 30(7): 1540-1543. doi: 10.3724/SP.J.1146.2006.01939 |
| |
| Authors: | Han Feng Liu Ying-zhuang Zhu Guang-xi Lu Xiao-feng |
| |
| Affiliation: | Dept. of Electronic and Information Engineering, Huazhong University Science & Technology, Wuhan 430074, China |
| |
| Abstract: | This paper investigates adaptive resource allocation scheme to maximize the sum-rate under the QoS constraint for multiuser MIMO/OFDM downlink. Specifically, the basestation exploits spatial division multiple access (SDMA) to support several users in each subcarrier, and linear precoding to reduce inferences among users. An adaptive power and bit allocation scheme with guaranteed QoS is provided. And two low-complexity suboptimal bit fill and bit removal algorithms which could be used in practical systems are proposed. Simulation results show that these two algorithms achieve nearly the same performance as the optimal one. |
| |
| Keywords: | MIMO/OFDM Resource allocation QoS |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《电子与信息学报》浏览原始摘要信息 |
|
点击此处可从《电子与信息学报》下载全文 |
|
