dc.contributor.author Tourki, Kamel dc.contributor.author Qaraqe, Khalid A. dc.contributor.author Alouini, Mohamed-Slim dc.date.accessioned 2015-08-03T10:59:15Z dc.date.available 2015-08-03T10:59:15Z dc.date.issued 2013-02 dc.identifier.citation Tourki, K., Qaraqe, K. A., & Alouini, M.-S. (2013). Outage Analysis for Underlay Cognitive Networks Using Incremental Regenerative Relaying. IEEE Transactions on Vehicular Technology, 62(2), 721–734. doi:10.1109/tvt.2012.2222947 dc.identifier.issn 00189545 dc.identifier.doi 10.1109/TVT.2012.2222947 dc.identifier.uri http://hdl.handle.net/10754/562636 dc.description.abstract Cooperative relay technology has recently been introduced into cognitive radio (CR) networks to enhance the network capacity, scalability, and reliability of end-to-end communication. In this paper, we investigate an underlay cognitive network where the quality of service (QoS) of the secondary link is maintained by triggering an opportunistic regenerative relaying once it falls under an unacceptable level. Analysis is conducted for two schemes, referred to as the channel-state information (CSI)-based and fault-tolerant schemes, respectively, where different amounts of CSI were considered. We first provide the exact cumulative distribution function (cdf) of the received signal-to-noise ratio (SNR) over each hop with colocated relays. Then, the cdf's are used to determine a very accurate closed-form expression for the outage probability for a transmission rate $R$. In a high-SNR region, a floor of the secondary outage probability occurs, and we derive its corresponding expression. We validate our analysis by showing that the simulation results coincide with our analytical results in Rayleigh fading channels. © 1967-2012 IEEE. dc.description.sponsorship This publication was made possible by National Priorities Research Program under Grant 08-152-2-043 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. The review of this paper was coordinated by Prof. H.-H. Chen. dc.publisher Institute of Electrical and Electronics Engineers (IEEE) dc.subject Incremental regenerative relaying dc.subject outage analysis dc.subject underlay cognitive networks dc.title Outage analysis for underlay cognitive networks using incremental regenerative relaying dc.type Article dc.contributor.department Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division dc.contributor.department Electrical Engineering Program dc.contributor.department Communication Theory Lab dc.identifier.journal IEEE Transactions on Vehicular Technology dc.contributor.institution Department of Electrical and Computer Engineering, Texas A and M University at Qatar, Doha, Qatar kaust.person Alouini, Mohamed-Slim
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