Paper Info
Title
Capacity of Reactive DF Scheme in Cognitive Relay Networks
Abstract
This paper evaluates the capacity of the reactive decode-and-forward (R-DF) scheme, which considers the reduced relay candidates based on the signal-to-noise ratio (SNR) of the source-relay link for relay selection in underlay cognitive relay networks. The performance of R-DF scheme is compared with that of the proactive DF (P-DF) scheme. It has been proven that R-DF scheme achieves the similar capacity of P-DF scheme as the primary receiver is located further from the secondary source. Since the transmission power of a secondary user is constrained by the location of the primary receiver, the performance of a cognitive relay network varies depending on the considered link for determining the relay candidates, between the source-relay and the relay-destination links. Hence, we also analyze the performance of the backward R-DF (BR-DF) scheme which the relay candidates are determined based on the relay-destination link. It is also verified that the performance of BR-DF scheme is better than that of R-DF scheme when the primary receiver is located close to the secondary source.
Year
DOI
Venue
2011
10.1109/TWC.2011.081011.101849
IEEE Transactions on Wireless Communications
Keywords
Field
DocType
underlay cognitive relay network,radio links,source-relay link,relay,decode and forward communication,relay-destination link,cognitive radio,reactive df scheme,cooperative diversity,relay selection,radio receivers,backward reactive decode-and-forward scheme,primary receiver,signal-to-noise ratio,interference,random variables,wireless communication,random variable,signal to noise ratio
Relay channel,Secondary source,Wireless,Cooperative diversity,Signal-to-noise ratio,Computer network,Underlay,Relay,Mathematics,Cognitive radio
Journal
Volume
Issue
ISSN
10
10
1536-1276
Citations 
PageRank 
References 
48
2.43
13
Authors
3
Name
Order
Citations
PageRank
Sanguk Sagong1482.43
Jemin Lee21440102.93
Daesik Hong33090242.02