Performance Analysis of Relay Networks Based on Limited Feedback Beamforming

doi:10.13190/jbupt.201004.140.liuzh

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

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Performance Analysis of Relay Networks Based on Limited Feedback Beamforming

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

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

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

CLC Number:

TN911.22

LIU Zhen, WANG Xiao-Xiang, ZHANG Hong-Chao, SONG Zhen-Feng. Performance Analysis of Relay Networks Based on Limited Feedback Beamforming[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2010, 33(4): 140-144.

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Performance Analysis of Relay Networks Based on Limited Feedback Beamforming

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