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

• Wireless • Previous Articles     Next Articles

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


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