Title :
Cooperative ARQ protocols for underlay cognitive radio networks
Author :
Touati, Samy ; Boujemaa, Hatem ; Abed, Nagy
Author_Institution :
King Saud Univ., Riyadh, Saudi Arabia
Abstract :
In this paper, we derive the throughput of cooperative Automatic Repeat reQuest protocols for underlay cognitive radio networks. Three relay selection techniques are investigated: Opportunistic Amplify and Forward (O-AF), Partial Relay Selection AF (PRS-AF) and Opportunistic Decode and Forward (O-DF). In O-AF, the selected relay should offer the highest SNR of the relaying link (S-R-D) and verify some interference constraint. In PRS-AF, the selected relay offers the highest SNR of the first hop (S-R) and verify the interference constraint. In O-DF, the selected relay should have correctly decoded the packet, verify the interference constraint and offer the highest SNR of the second hop. Theoretical curves are validated using simulation results for different number of relays and interference threshold.
Keywords :
amplify and forward communication; automatic repeat request; cognitive radio; cooperative communication; decode and forward communication; probability; protocols; radiofrequency interference; relay networks (telecommunication); O-AF selection technique; O-DF selection technique; PRS-AF selection technique; SNR; cooperative ARQ protocols; cooperative automatic repeat request protocols; interference constraint; interference threshold; opportunistic amplify and forward; opportunistic decode and forward selection technique; partial relay selection AF selection technique; relay selection techniques; relaying link; theoretical curves; underlay cognitive radio networks; Automatic repeat request; Cognitive radio; Interference constraints; Protocols; Relays; Signal to noise ratio; Automatic Repeat reQuest (ARQ); Cognitive radio networks; cooperative communications;
Conference_Titel :
Signal Processing Conference (EUSIPCO), 2013 Proceedings of the 21st European
Conference_Location :
Marrakech
