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AuthorHussain S.I.
AuthorAlouini M.-S.
AuthorHasna , Mazen
AuthorQaraqe K.
Available date2022-04-26T11:06:55Z
Publication Date2012
Publication NameIEEE Vehicular Technology Conference
ResourceScopus
Identifierhttp://dx.doi.org/10.1109/VETECS.2012.6240207
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84865018315&doi=10.1109%2fVETECS.2012.6240207&partnerID=40&md5=31be098eb1e9c34fd202fdbe03247f7d
URIhttp://hdl.handle.net/10576/30531
AbstractIn a communication system with multiple cooperative relays, selecting the best relay utilizes the available spectrum more efficiently. However, selective relaying poses a different problem in underlay cognitive networks compared to the traditional cooperative networks due to interference thresholds to the primary users. In most cases, a best relay is the one which provides the maximum end-to-end signal to noise ratio (SNR). This approach needs plenty of instantaneous channel state information (CSI). The CSI burden could be reduced by partial relay selection. In this paper, a partial relay selection scheme is presented and analyzed for an underlay cognitive network with fixed gain relays operating in the vicinity of a primary user. The system model is adopted in a way that each node needs minimal CSI to perform its task. The best relay is chosen on the basis of maximum source to relay link SNR which then forwards the message to the destination. We derive closed form expressions for the received SNR distributions, system outage, probability of bit error and average channel capacity of the system. The derived results are confirmed through simulations.
SponsorQatar National Research Fund
Languageen
PublisherIEEE
SubjectClosed-form expression
Cognitive network
Cooperative networks
Cooperative relay
Fixed-gain relays
Instantaneous channel state informations
Partial relay selections
Probability of bit error
Relay links
Relay selection
System models
System outages
Underlay networks
User cooperation
Cognitive radio
Communication systems
Overlay networks
Probability distributions
Communication channels (information theory)
TitlePartial relay selection in underlay cognitive networks with fixed gain relays
TypeConference Paper
dc.accessType Abstract Only


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