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AuthorHussain S.I.
AuthorAlouini M.-S.
AuthorQaraqe K.
AuthorHasna , Mazen
Available date2022-04-26T11:06:54Z
Publication Date2012
Publication NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
ResourceScopus
Identifierhttp://dx.doi.org/10.1109/PIMRC.2012.6362529
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84871977302&doi=10.1109%2fPIMRC.2012.6362529&partnerID=40&md5=0b0af1e260bd0e3cdddf72c030cda108
URIhttp://hdl.handle.net/10576/30522
AbstractSelective cooperation is a well investigated technique in non-cognitive networks for efficient spectrum utilization and performance improvement. However, it is still a nascent topic for underlay cognitive networks. Recently, it was investigated for underlay networks where the secondary nodes were able to adapt their transmit power to always satisfy the interference threshold to the primary users. This is a valid assumption for cellular networks but many non-cellular devices have fixed transmit powers. In this situation, selective cooperation poses a more challenging problem and performs entirely differently. In this paper, we extend our previous work of selective cooperation based on either hop's signal to noise ratio (SNR) with fixed gain and fixed transmit power relays in an underlay cognitive network. This work lacked in considering the primary interference over the cognitive network and presented a rather idealistic analysis. This paper deals with a more realistic system model and includes the effects of primary interference on the secondary transmission. We first derive end-to-end signal to interference and noise ratio (SINR) expression and the related statistics for a dual-hop relay link using asymptotic and approximate approaches. We then derive the statistics of the selected relay link based on maximum end-to-end SINR among the relays satisfying the interference threshold to the primary user. Using this statistics, we derive closed form asymptotic and approximate expressions for the outage probability of the system. Analytical results are verified through simulations. It is concluded that selective cooperation in underlay cognitive networks performs better only in low to medium SNR regions.
SponsorQatar National Research Fund
Languageen
PublisherIEEE
SubjectAnalytical results
Approximate expressions
Cellular network
Closed form
Cognitive network
Cooperation based
Fixed-gain relays
Interference modeling
Outage analysis
Outage probability
Performance improvements
Realistic systems
Relay links
Relay selection
Signal-to-interference and noise ratios
Spectrum utilization
Transmit power
Underlay networks
User cooperation
Valid assumption
Cognitive radio
Overlay networks
Radio communication
Signal interference
Signal to noise ratio
TitleOutage analysis of selective cooperation in underlay cognitive networks with fixed gain relays and primary interference modeling
TypeConference Paper
Pagination1203-1207
dc.accessType Abstract Only


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