Multi-user diversity in a spectrum sharing system
IEEE Transactions on Wireless Communications
Cooperative decode-and-forward relaying for secondary spectrum access
IEEE Transactions on Wireless Communications
Cooperative wireless communications: a cross-layer approach
IEEE Wireless Communications
Fundamental limits of spectrum-sharing in fading environments
IEEE Transactions on Wireless Communications
Outage Probability of Cognitive Relay Networks with Interference Constraints
IEEE Transactions on Wireless Communications
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Approaches to spectrum sharing
IEEE Communications Magazine
Spectrum Leasing to Cooperating Secondary Ad Hoc Networks
IEEE Journal on Selected Areas in Communications
Wireless Personal Communications: An International Journal
Exact Outage Probability of Underlay Cognitive Cooperative Networks Over Rayleigh Fading Channels
Wireless Personal Communications: An International Journal
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In this paper, we examine an adaptive decode-and-forward cooperative protocol under interference constraint. In the proposed protocol, relying on the obtained instantaneous signal-to-noise ratios (SNRs), a direct link or relay link is used to transmit data from the secondary source to the secondary destination. In addition, once the relay link is used, the secondary source and relay must adapt their transmit power to maximize the instantaneous SNR of this link. To evaluate the performance of the proposed protocol, we derive closed-form lower-bound and upper-bound expressions for the outage probability over Rayleigh fading channel. Finally, various Monte-Carlo simulations are presented to verify our analysis and compare the performance of the proposed protocol with that of the direct transmission protocol in underlay cognitive network.