Performance Analysis for Multi-Antenna Relay Networks with Limited Feedback Beamforming

Zhen LIU  Xiaoxiang WANG  Hongtao ZHANG  Zhenfeng SONG  

IEICE TRANSACTIONS on Communications   Vol.E94-B   No.2   pp.603-606
Publication Date: 2011/02/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.603
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
decode-and-forward,  multi-antenna relay,  outage probability,  error rate,  limited feedback beamforming,  

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In this letter, we study the performance of multi-antenna relay networks with limited feedback beamforming in decode-and-forward (DF) relaying. Closed-form expression for both outage probability and symbol error rate are derived by using the moment generation function (MGF) of the combined signal-to-noise ratio (SNR) at the destination. Subjected to a total power constraint, we also explore adaptive power allocation between source and relay to optimize the performance. Simulations are given to verify the correctness of our theoretical derivations. Results show that the proposed adaptive power allocation solution significantly outperforms the uniform power allocation method.