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Outage probability analysis of partial AF relay selection in spectrum-sharing scenario with multiple primary users

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5 Author(s)
J. Chen ; Integrated Service Networks Lab of Xidian University, South Taibai Road, Xi'an, People's Republic of China ; Z. Li ; J. Si ; H. Huang
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In the presence of multiple primary users (PUs), the exact outage probability of partial amplify-and-forward (AF) relay selection in the spectrum-sharing relay networks is investigated. To gain more insight, a simple and accurate outage probability approximation is also derived in the high signal-to-noise ratio (SNR) region. It is shown that, at high SNR, the outage probability is affected only by the channel gain ratio between relay-destination links to relay-PU links, regardless of the number of relays. Moreover, when more PUs are present, it causes outage performance degradation on the secondary system. Finally, simulation results are presented to verify the analysis.

Published in:

Electronics Letters  (Volume:48 ,  Issue: 19 )