Reference : Simultaneous Sensing and Transmission for Cognitive Radios with Imperfect Signal Canc...
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/31368
Simultaneous Sensing and Transmission for Cognitive Radios with Imperfect Signal Cancellation
English
Politis, Christos mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Maleki, Sina mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Tsinos, Christos [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Liolis`, Konstantinos []
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) > >]
2017
IEEE Transactions on Wireless Communications
Institute of Electrical and Electronics Engineers
Yes (verified by ORBilu)
International
1536-1276
1558-2248
New York
NY
[en] Cognitive radio ; simultaneous sensing and transmission ; Energy Detector ; truncated chi-squared distribution ; imperfect signal cancellation
[en] In conventional cognitive radio systems, the secondary user employs a “listen-before-talk” paradigm, where it senses if the primary user is active or idle, before it decides to access the licensed spectrum. However, this method faces challenges with the most important being the reduction of the secondary user’s throughput, as no data transmission takes place during the
sensing period. In this context, the idea of simultaneous spectrum sensing and data transmission is proposed. The present work studies a system model where this concept is obtained through the collaboration of the secondary transmitter with the secondary receiver. First, the secondary receiver decodes the signal from the secondary transmitter, subsequently, removes it from the total received signal and then, carries out spectrum sensing in the remaining signal in order to decide about the presence/absence of the primary user. Different from the existing literature, this paper takes into account the imperfect signal cancellation, evaluating how the decoding errors affect the sensing reliability and derives the analytical expressions for the probability of false alarm. Finally, numerical results are presented illustrating the accuracy of the proposed analysis.
Fonds National de la Recherche - FnR
http://hdl.handle.net/10993/31368
FnR ; FNR8225172 > Symeon Chatzinotas > SATSENT > SATellite SEnsor NeTworks for spectrum monitoring > 01/04/2015 > 31/03/2018 > 2014

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