Title :
Outage Performance of DF-Based Cooperative Multicast in Spectrum-Sharing Cognitive Relay Networks
Author :
Long Yang ; Jian Chen ; Yonghong Kuo ; Hailin Zhang
Author_Institution :
Sch. of Telecommun. Eng., Xidian Univ., Xi´an, China
Abstract :
This letter investigates the outage performance of decode-and-forward-based cooperative multicast (CM) in spectrum-sharing cognitive relay networks (CRNs). Considering a CRN coexisted with multiple primary users, a closed-form expression for the exact outage probability of CM is derived over independently and non-identically distributed Rayleigh fading channels. The asymptotic analysis is also presented to reveal that the diversity gain of CM in CRNs is determined by the number of relays, and the spectrum-sharing scenario only has impact on coding gain. Simulation results corroborate our theoretical analysis.
Keywords :
Rayleigh channels; cognitive radio; cooperative communication; encoding; multicast communication; radio spectrum management; CRN; DF-based cooperative multicast; asymptotic analysis; closed-form expression; coding gain; decode-and-forward-based cooperative multicast; distributed Rayleigh fading channels; diversity gain; outage performance; outage probability; relays; spectrum-sharing cognitive relay networks; spectrum-sharing scenario; Diversity methods; Encoding; Fading; Interference; Signal to noise ratio; Cooperative multicast; best relay selection; decode-and-forward; outage probability; spectrum-sharing;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2014.2327631
