J4 ›› 2011, Vol. 38 ›› Issue (1): 66-70.doi: 10.3969/j.issn.1001-2400.2011.01.011

• 研究论文 • 上一篇    下一篇

下行多用户MIMO传输系统中鲁棒性连续MMSE预编码方案

李川1;刘伟2;李小亚2;周利华1   

  1. (1. 西安电子科技大学 多媒体技术研究所,陕西 西安   710071;
    2. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,信息科学研究所,宽带无线通信实验室,陕西 西安   710071)
  • 收稿日期:2010-07-16 出版日期:2011-02-20 发布日期:2011-04-08
  • 通讯作者: 李川
  • 作者简介:李川(1977-),女,西安电子科技大学博士研究生,E-mail: chuanliuk@yahoo.com.
  • 基金资助:

    国家杰出青年科学基金资助项目(60725105);国家重点基础研究发展计划(973计划)资助项目(2009CB320404);中央高校基本科研业务费专项资金资助项目(JY10000901030, JY10000901031);西安电子科技大学留学回国人员创新基金资助项目(64101879);综合业务网理论及关键技术国家重点实验室资助项目(ISN1003002)

Robust successive MMSE precoding for the MU-MIMO downlink transmission system

LI Chuan1;LIU Wei2;LI Xiaoya2;ZHOU Lihua1   

  1. (1. Research Inst. of Multimedia Technology, Xidian Univ., Xi'an  710071, China;
    2. State Key Lab. of Integrated Service Networks, Research Inst. of Information Science, Broadband Wireless Communications Lab., Xidian Univ., Xi'an  710071, China)
  • Received:2010-07-16 Online:2011-02-20 Published:2011-04-08
  • Contact: LI Chuan

摘要:

针对MIMO多用户下行传输系统中,发端仅有不完全的信道状态信息(CSI)的场景,提出了一种鲁棒性的连续最小均方误差(MMSE)预编码方案.与传统的鲁棒性MMSE预编码方案相比较,可以支持接收端配置多根天线,从而接收端可以对接收到的信号进行联合处理.仿真结果表明,与没有考虑信道估计误差影响的方案相比,该方案可以有效地提高系统性能,甚至于消除误码平层.

关键词: MIMO, 多用户, 连续MMSE, 预编码, 鲁棒性

Abstract:

A robust successive MMSE (SMMSE) precoding scheme is proposed in the context of the multiple user multiple input multiple output (MU-MIMO) downlink (DL) transmission system under the condition of imperfect channel state information (CSI) at the transmitter side. The proposed algorithm enables us to use multiple antennas at the receiving terminal so that it is possible to jointly process the received signal at the receiving terminial, with the eigen-beamforming technique belonging to the joint processing method. Simulation results show that the robust SMMSE algorithm aided eigen-beamforing technique can effectively improve the system performance compared to the one without considering the impact of the channel estimation error, and even completely remove the error floor.

Key words: MIMO, multiuser, successive MMSE, precoding, robust