Article (Scientific journals)
Cognitive Radio Techniques under Practical Imperfections: A Survey
Sharma, Shree Krishna; Bogale, Tadilo Endeshaw; Chatzinotas, Symeon et al.
2015In IEEE Communications Surveys and Tutorials
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Keywords :
Cognitive Radio; Practical Imperfections; Cognitive Radio Survey; Noise Uncertainty; Channel Uncertainty; Hardware Imperfections; Spectrum Sensing; Underlay; Interference Uncertainty; Noise correlation; Channel correlation; Cyclostationary detector; Eigenvalue based detector; Moment based detector; Blind detector; SNR Estimation; Parameter Estimation; Hybrid Cognitive Radio
Abstract :
[en] Cognitive Radio (CR) has been considered as a potential candidate for addressing the spectrum scarcity problem of future wireless networks. Since its conception, several researchers, academic institutions, industries, regulatory and standardization bodies have put their significant efforts towards the realization of CR technology. However, as this technology adapts its transmission based on the surrounding radio environment, several practical issues may need to be considered. In practice, several imperfections such as noise uncertainty, channel/interference uncertainty, transceiver hardware imperfections, signal uncertainty, synchronization issues, etc. may severely deteriorate the performance of a CR system. To this end, the investigation of realistic solutions towards combating various practical imperfections is very important for successful implementation of the cognitive technology. In this direction, first, this survey paper provides an overview of the enabling techniques for CR communications. Subsequently, it discusses the main imperfections that may occur in the most widely used CR paradigms and then reviews the existing approaches towards addressing these imperfections. Finally, it provides some interesting open research issues.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Sharma, Shree Krishna ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Bogale, Tadilo Endeshaw;  Universite du Quebec, Montreal, QC, Canada > INRS
Chatzinotas, Symeon  ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Ottersten, Björn ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
Le, Long Bao;  Universite du Quebec, Montreal, QC, Canada > INRS
Wang, Xianbin;  University of Western Ontario, London, ON, Canada
External co-authors :
yes
Language :
English
Title :
Cognitive Radio Techniques under Practical Imperfections: A Survey
Publication date :
July 2015
Journal title :
IEEE Communications Surveys and Tutorials
ISSN :
1553-877X
Publisher :
IEEE
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBilu :
since 07 August 2015

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