中文

Journal of Applied Sciences ›› 2013, Vol. 31 ›› Issue (5): 454-458.doi: 10.3969/j.issn.0255-8297.2013.05.003

• Communication Engineering • Previous Articles     Next Articles

Design of Double Codebook for Multi-cell Systems with Limited Feedback

ZHAO Wei1,2, YUAN Chao-wei2, LI Mei-ling2, LI Ying-xue2   

  1. 1. School of Electrical and Electronic Engineering, North China Electric Power
    University, Baoding 071003, Hebei Province, China
    2. School of Information and Communication Engineering, Beijing University
    of Posts and Telecommunications, Beijing 100876, China
  • Received:2011-12-22 Revised:2012-05-25 Online:2013-09-26 Published:2012-05-25

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Abstract: We consider a two-cell Wyner model with limited feedback. Due to the existence of channel quantizing error, the system cannot reach the theoretical full multiplexing gain. This paper proposes to use feedback information of the phase between channel direction and perfect channel (PI) to achieve the full
multiplexing gain. To design phase of the feedback codebook, we derive the probability density function of phase, and design a non-uniform quantification codebook based on the PDF. Simulation results show that the proposed scheme can improve the system capacity by 2.5 dB as compared to the traditional CDI scheme. Compared to uniform quantification, the system capacity has 1 dB improvement.

Key words: quantization error, double codebook, feedback phase, non-uniform quantization, multiplexing gain

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