Acta Metallurgica Sinica(English letters) ›› 2009, Vol. 16 ›› Issue (6): 11-16.doi: 10.1016/S1005-8885(08)60282-4

• Wireless • 上一篇    下一篇

Novel limited feedback scheme under the MIMO broadcast system

程铁铮,袁超伟   

  1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2009-03-02 修回日期:1900-01-01 出版日期:2009-12-30
  • 通讯作者: 程铁铮

Novel limited feedback scheme under the MIMO broadcast system

CHENG Tie-zheng , YUAN Chao-wei   

  1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2009-03-02 Revised:1900-01-01 Online:2009-12-30
  • Contact: CHENG Tie-zheng

摘要:

By deducing the distribution of the normalized channel covariance matrix, a novel limited feedback scheme is proposed under multiple users (MU) multiple-input multiple-output (MIMO) broadcast channel (BC) system. The proposed scheme has advantages in three aspects. First, it has no constraints on the number of users or antennas. Second, each user’s feedback bits are independent of the number of receiving antennas. Third, the proposed scheme avoids the storage of large-size codebook on the transceivers. Simulation results show that the performance of the proposed scheme is close to the perfect channel state information (CSI) case and it just needs a small number of feedback bits.

关键词:

MIMO,;broadcast;channel,;limited;feedback,;normalized;channel;covariance;

Abstract:

By deducing the distribution of the normalized channel covariance matrix, a novel limited feedback scheme is proposed under multiple users (MU) multiple-input multiple-output (MIMO) broadcast channel (BC) system. The proposed scheme has advantages in three aspects. First, it has no constraints on the number of users or antennas. Second, each user’s feedback bits are independent of the number of receiving antennas. Third, the proposed scheme avoids the storage of large-size codebook on the transceivers. Simulation results show that the performance of the proposed scheme is close to the perfect channel state information (CSI) case and it just needs a small number of feedback bits.

Key words:

MIMO;broadcast channel;limited feedback;normalized channel covariance