全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

Performance Analysis of Amplify-and-Forward Relay Based Cooperative Spectrum Sensing in Fading Channels

Keywords: Area under Curve , Amplify and Forward , Cooperative Relay Network , Diversity Combining , Energy Detector , Spectrum Sensing

Full-Text   Cite this paper   Add to My Lib

Abstract:

Relay based cooperative spectrum sensing elevates the spectrum sensing problems in harsh propagationconditions if the relay nodes are positioned suitably for the dynamic spectrum access systems. This articleinvestigates the performance of relay based spectrum sensing (energy detection based) in myriad fadingenvironments using the area under the receiver operating characteristic curve (AUC) performancemetric. AUC is a single statistical parameter, which provides better insight of detection probabilitycompared to the receiver operating characteristic curve (ROC). The article includes the performanceanalysis of two-hop multi-relay amplify-and-forward (AF) relay network with channel state information(CSI) assisted relaying (variable relay gain) and blind (fixed) relay gain. A unified model is alsoinvestigated to describe the relay network for variable and fixed relay gain. Various fading and relayconfigurations are illustrated to show the efficacy of the energy detection based collaborative spectrumsensing in AF relay configuration using the AUC performance metric. Performance of the variable andfixed relay gain based AF relay network are analysed and compared considering different factorsaffecting energy sensing such as the per-hop signal-to-noise ratio (SNR), fading index, and the timebandwidth product. The results can be readily used for the design of the cognitive relay network.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133