On the Performance of Amplify-and-Forward Relay Systems with Limited Feedback Beamforming

Erlin ZENG  Shihua ZHU  Xuewen LIAO  Zhimeng ZHONG  Zhenjie FENG  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.6   pp.2053-2057
Publication Date: 2008/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.6.2053
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
amplify-and-forward,  relaying,  beamforming,  limited feedback,  outage probability,  

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Prior studies have shown that the performance of amplify-and-forward (AF) relay systems can be considerably improved by using multiple antennas and low complexity linear processing at the relay nodes. However, there is still a lack of performance analysis for the cases where the processing is based on limited feedback (LFB). Motivated by this, we derive the closed-form expression of the outage probability of AF relay systems with LFB beamforming in this letter. Simulation results are also provided to confirm the analytical studies.