计算机应用 ›› 2010, Vol. 30 ›› Issue (05): 1179-1182.

• 网络与通信 • 上一篇    下一篇

BF-MIMO系统下行链路容量分析及仿真

郭建新1,曹小敏2,张辉2,霍文俊2   

  1. 1. 空军工程大学电讯工程学院
    2.
  • 收稿日期:2009-11-06 修回日期:2009-12-02 发布日期:2010-05-04 出版日期:2010-05-01
  • 通讯作者: 郭建新
  • 基金资助:
    国家自然科学基金资助项目;陕西省自然科学基金资助项目

Capacity analysis and simulation for downlink transmissions of BF-MIMO system

  • Received:2009-11-06 Revised:2009-12-02 Online:2010-05-04 Published:2010-05-01
  • Contact: Jian XinGUO

摘要: 针对波束赋形(BF)和多输入多输出(MIMO)这两种多天线技术的结合问题,提出一种通用的波束赋形—多输入多输出(BF-MIMO)下行链路系统方案,以期有效发挥二者优势,进一步提升信道容量和系统性能。分析了该系统的信号变换形式和处理过程,给出了平坦衰落环境下该系统的组合信道矩阵形式,得到了赋形加权后的系统信道容量闭合表达式。理论分析和仿真结果表明,在相同衰落条件下,BF-MIMO系统能够比常规MIMO系统获得更高的信道容量。

关键词: 波束赋形, 多入多出, 空间复用, 空间分集, 平坦衰落, 信道状态信息

Abstract: Intended for the combination of BeamForming (BF) and Multiple Input Multiple Output (MIMO), a generalized wireless transmission scheme named BF-MIMO was presented with a view to bring both advantages into full play and enhance the channel capacity and system performance. According to a series of transformations of the signals in the transmitter and receiver antenna pairs, a combined flat fading channel matrix was analyzed and formulated. Besides, based on the steering vector of transmitter sub-arrays, the closed-form expression of the channel capacity was also given. Finally, the capacity enhancement of the proposed scheme over traditional MIMO systems was demonstrated and verified by simulation results.

Key words: BeamFoming (BF), Multiple Input Multiple Output (MIMO), Space Multiplexing (SM), Space Diversity (SD), flat fading, Channel State Information (CSI)