Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2010, Vol. 33 ›› Issue (4): 140-144.doi: 10.13190/jbupt.201004.140.liuzh

• Reports • Previous Articles    

Performance Analysis of Relay Networks Based on Limited Feedback Beamforming

 LIU  Zhen, WANG  Xiao-Xiang, ZHANG  Hong-Chao, SONG  Zhen-Feng   

  1. Key Laboratory of University Wireless Communication(Beijing University of Posts and Telecommunication),Ministry of Education,Beijing 100876,China
  • Online:2010-08-28 Published:2010-08-28

Abstract:

To analyze the impact of quantized feedback on multi-antenna relay system, the letter derives the outage probability and capacity of relay system,which retransmits signal by using limited feedback beamforming. First, we derive the moment generation function of received signal-to-noise ratio and achieve the outage probability by using inverse Laplace transform. Second, we derive the capacity upper bound based on Jensen's inequality. Finally, Numerial results are given to verify feedvack beamforming could achieve the tradeoff between and feedbacks. The system performance can be improved by the increase of antenna numbers and feedback bits.

Key words: relay, beamforming, outage probability, capacity

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