Beamforming Amplify-and-Forward Relay Networks With Feedback Delay and Interference

In this letter, we investigate the effect of feedback delay on the performance of a dual-hop amplify-and-forward (AF) relay network with beamforming in the presence of multiple interferers over Rayleigh fading channels. Specifically, we derive closed-form expressions for the outage probability (OP)...

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Bibliographic Details
Published in:IEEE signal processing letters 2012-01, Vol.19 (1), p.16-19
Main Authors: Hoc Phan, Duong, T. Q., Elkashlan, M., Zepernick, H-J
Format: Article
Language:English
Subjects:
Amplifiers
Amplify-and-forward (AF)
Array signal processing
beamforming
feedback delay
Interference
outage probability
Power outages
Relays
Signal to noise ratio
symbol error rate
Vectors
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Summary:In this letter, we investigate the effect of feedback delay on the performance of a dual-hop amplify-and-forward (AF) relay network with beamforming in the presence of multiple interferers over Rayleigh fading channels. Specifically, we derive closed-form expressions for the outage probability (OP) and the symbol error rate (SER). Furthermore, to render insights into the effect of feedback delay and interference on the network performance, asymptotic OP and SER are also presented. These asymptotic expressions are very tight in the high signal-to-noise ratio regime, readily enabling us to obtain the diversity and coding gains of the considered network.
ISSN:1070-9908
1558-2361
1558-2361
DOI:10.1109/LSP.2011.2175217