naa a22 4500 510792510 CHVBK 20180411083324.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11277-012-0968-9 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0968-9 Performance Analysis of Incremental Amplify-and-Forward Relaying Protocols with Nth Best Partial Relay Selection Under Interference Constraint [Elektronische Daten] [Tran Duy, Hyung-Yun Kong] In this paper, we investigate two incremental amplify-and-forward relaying protocols in cognitive underlay networks. In the proposed protocols, whenever the secondary destination cannot receive the secondary source's signal successfully, it requests a retransmission from one of M secondary relays. In the first protocol, we assume that a secondary relay with the Nth best channel gain to the secondary source is used to forward the received signal to the secondary destination. In the second protocol, relying on the quality of channels between the secondary relay and secondary destination and between the secondary relay and primary user, the Nth best relay is chosen for the retransmission. We derive exact closed-form expressions of the outage probability and average number of time slots for both protocols over Rayleigh fading channel. Finally, these mathematical expressions are then verified by Monte Carlo simulations. Springer Science+Business Media New York, 2012 Cooperative relaying nationallicence Cognitive underlay network nationallicence Amplify-and-forward nationallicence Outage probability nationallicence Relay selection nationallicence Duy Tran University of Ulsan, Ulsan, South Korea aut Kong Hyung-Yun University of Ulsan, Ulsan, South Korea aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/4(2013-08-01), 2741-2757 0929-6212 71:4<2741 2013 71 11277 https://doi.org/10.1007/s11277-012-0968-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0968-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Duy Tran University of Ulsan, Ulsan, South Korea aut NATIONALLICENCE 700 1- Kong Hyung-Yun University of Ulsan, Ulsan, South Korea aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/4(2013-08-01), 2741-2757 0929-6212 71:4<2741 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer