IEEE 802.16中基于空时编码的多用户MIMO-OFDM系统跨层设计

doi:10.3969/j.issn.0255-8297.2011.03.002

应用科学学报 ›› 2011, Vol. 29 ›› Issue (3): 228-232.doi: 10.3969/j.issn.0255-8297.2011.03.002

IEEE 802.16中基于空时编码的多用户MIMO-OFDM系统跨层设计

谢威1;2，余江2

1. 上海交通大学电子工程系，上海200240
2. 解放军理工大学通信工程学院，南京210007

收稿日期:2010-09-27 修回日期:2010-12-31 出版日期:2011-05-26 发布日期:2011-05-26
作者简介:谢威，博士生，移动通信、移动通信网络、协同通信和认知通信，E-mail: edifier77@163.com
基金资助:
国家“863”高技术研究发展计划基金(No.2009AA01Z249)；国家重大专项课题基金(No.2010ZX03003-003-01)；国家自然科学
基金(No.60972050)资助

Cross-Layer Design in Multiuser MIMO-OFDM Systems Based on Space-Time Block Coding for IEEE 802.16

XIE Wei1;2, YU Jiang2

1. Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200240, China
2．Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China

Received:2010-09-27 Revised:2010-12-31 Online:2011-05-26 Published:2011-05-26

摘要/Abstract

摘要：

研究了多用户MIMO-OFDM系统中基于空时编码的联合数据包调度和动态资源分配的跨层设计. 根据IEEE 802.16协议将所有业务类型分为4 类，在媒体接入层利用一种分层的调度架构进行各用户各业务间的数据包调度：第1层调度器负责同类业务中不同用户的调度，第2 层负责不同业务之间的调度. 最后在物理层根据媒体接入层调度结果和信道状态信息联合考虑进行无线资源的自适应分配. 仿真结果表明，所提出的方法在丢包率、包时延和系统吞吐量等方面的性能都有明显提高.

关键词: 空时编码, 跨层设计, IEEE 802.16, 多用户MIMO-OFDM系统

Abstract:

Cross-layer design of packet scheduling and adaptive resource allocation in multiuser MIMO-OFDM systems are investigated based on space-time block coding (STBC). Different types of service are grouped into four types according to the 802.16 protocol. A two-layer scheduling architecture is then used to shape traffic at medium access (MAC) layer: the first layer schedule packets for different users of the same service type, and the second for different service types. A resource allocation algorithm is proposed to efficiently allocate wireless resource at physical layer according to the scheduling results of the MAC layer and the channel state information. Simulation results show that the proposed algorithm can achieve significant improvement in packet drop rate, packet delay, and system throughput as compared to an existing method.

Key words: multiuser MIMO-OFDM, space-time block coding (STBC), cross-layer design, IEEE 802.16

中图分类号:

TN911.7

谢威，余江. IEEE 802.16中基于空时编码的多用户MIMO-OFDM系统跨层设计[J]. 应用科学学报, 2011, 29(3): 228-232.

XIE Wei1;2, YU Jiang2. Cross-Layer Design in Multiuser MIMO-OFDM Systems Based on Space-Time Block Coding for IEEE 802.16[J]. Journal of Applied Sciences, 2011, 29(3): 228-232.

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IEEE 802.16中基于空时编码的多用户MIMO-OFDM系统跨层设计

Cross-Layer Design in Multiuser MIMO-OFDM Systems Based on Space-Time Block Coding for IEEE 802.16

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