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

Volume

18

Issue

7

fYear

2014

fDate

Jul-14

Firstpage

1250

Lastpage

1253

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;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2014.2327631

Filename

6823645