Outage Performance of DF-Based Cooperative Multicast in Spectrum-Sharing Cognitive Relay Networks

被引：20
|
作者：
Yang, Long [1 ]
Chen, Jian [1 ]
Kuo, Yonghong [1 ]
Zhang, Hailin [1 ]
机构：
[1] Xidian Univ, Sch Telecommun Engn, Xian 710071, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2014年 / 18卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Cooperative multicast; decode-and-forward; best relay selection; spectrum-sharing; outage probability; PROBABILITY; SYSTEMS; RADIO; TRANSMISSIONS; SELECTION;
D O I：
10.1109/LCOMM.2014.2327631
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
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.
引用
收藏
页码：1250 / 1253
页数：4
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