Cognitive Fixed-Gain Amplify-and-Forward Relay Networks under Interference Constraints

Dac-Binh HA
Vo Nguyen Quoc BAO
Xuan-Nam TRAN
Tuong-Duy NGUYEN

IEICE TRANSACTIONS on Communications   Vol.E96-B    No.1    pp.375-378
Publication Date: 2013/01/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E96.B.375
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
spectrum sharing,  cognitive radio,  fixed-gain (FG),  amplify-and-forward (AF),  relay networks,  selection diversity,  

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In this work, we analyze the performance of cognitive amplify-and-forward (AF) relay networks under the spectrum sharing approach. In particular, by assuming that the AF relay operates in the semi-blind mode (fixed-gain), we derive the exact closed-form expressions of the outage probability for the cognitive relaying (no direct link) and cognitive cooperative (with direct link) systems. Simulation results are presented to verify the theoretical analysis.