北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (1): 111-114.doi: 10.13190/jbupt.201001.111.ranj

• 研究报告 • 上一篇    下一篇

利用HARQ多用户MIMO系统的自适应反馈方法

冉静;李立华;靳进;张平;刘泽民   

  1. (1. 泛网无线通信教育部重点实验室(北京邮电大学), 北京 100876; 2. 北京邮电大学 无线新技术研究所, 北京 100876)
  • 收稿日期:2009-04-30 修回日期:2009-09-23 出版日期:2010-02-28 发布日期:2010-02-28
  • 通讯作者: 冉静

Adaptive Feedback Algorithm for Multi-User MIMO System Based on HARQ

RAN Jing-LI Li-hua;JIN Jin;ZHANG Ping;LIU Ze-min   

  1. (1.Key Laboratory of Universal Wireless Communication(Beijing University of Posts and Telecommunications), Ministry of Education, Beijing 
  • Received:2009-04-30 Revised:2009-09-23 Online:2010-02-28 Published:2010-02-28
  • Contact: Ran Jing

摘要:

提出了一种利用混合自动重传请求(HARQ)的多用户多输入多输出(MIMO)系统的自适应反馈方法. 该方法利用HARQ过程中用户反馈的确认/不确认(ACK/NACK)信息,分析信道状态和多用户之间的配对状况,决定用户端何时反馈信道状态信息(CSI),并进行调度和预编码来提高系统容量. 仿真结果表明,该方法减少了反馈量,复杂度低,比传统的多用户MIMO系统具有更好的性能,特别是高信噪比和高速移动情况下,一定程度解决了多用户MIMO系统的瓶颈问题.

关键词: 多用户多输入多输出, 有限反馈, 混合自动重传请求

Abstract:

an adaptive feedback algorithm for multi-user multi-input multi-output (MIMO) system based on hybrid automatic repeat request (HARQ) is proposed in this paper. In the proposed scheme, base station receives the acknowledgement/no acknowledgement (ACK/NACK) from all users in HARQ processes, analyses the channel state and pairing state of scheduled users, controls the feedback of channel state information (CSI) from users, schedules and precodes the users to enhance the system capacity. The proposed scheme has the advantage of low feedback as well as low complexity and outperforms the traditional multi-user MIMO system. Especially, when high SNR regime or in high-speed mobility, this scheme alleviates the ceiling effect of multi-user MIMO.

Key words: multi-user multiple input multiple output, limited feedback, hybrid automatic repeat request

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