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Sensing-Throughput Tradeoff for Interweave Cognitive Radio System: A Deployment-Centric Viewpoint
Interdisciplinary Centre for Security, Reliability, and Trust (SnT), University of Luxembourg.ORCID iD: 0000-0003-2298-6774
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2016 (English)In: IEEE Transactions on Wireless Communications, ISSN 1536-1276, E-ISSN 1558-2248, Vol. 15, no 5, p. 3690-3702Article in journal (Refereed) Published
Abstract [en]

Secondary access to the licensed spectrum is viable only if the interference is avoided at the primary system. In this regard, different paradigms have been conceptualized in the existing literature. Among these, interweave systems (ISs) that employ spectrum sensing have been widely investigated. Baseline models investigated in the literature characterize the performance of the IS in terms of a sensing-throughput tradeoff, however, this characterization assumes perfect knowledge of the involved channels at the secondary transmitter, which is unavailable in practice. Motivated by this fact, we establish a novel approach that incorporates channel estimation in the system model, and consequently investigate the impact of imperfect channel knowledge on the performance of the IS. More particularly, the variation induced in the detection probability affects the detector's performance at the secondary transmitter, which may result in severe interference at the primary receivers. In this view, we propose employing average and outage constraints on the detection probability, in order to capture the performance of the IS. Our analysis reveals that with an appropriate choice of the estimation time determined by the proposed approach, the performance degradation of the IS can be effectively controlled, and subsequently the achievable secondary throughput can be significantly enhanced. © 2002-2012 IEEE.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2016. Vol. 15, no 5, p. 3690-3702
Keywords [en]
Channel estimation;Estimation;Interference;Receivers;Sensors;Throughput;Wireless communication;Channel estimation;Cognitive radio;Interweave system;Sensingthroughput tradeoff;Spectrum Sensing;channel estimation;interweave system;sensing-throughput tradeoff;spectrum sensing
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-259143DOI: 10.1109/TWC.2016.2525986ISI: 000378504100044Scopus ID: 2-s2.0-84969509956OAI: oai:DiVA.org:kth-259143DiVA, id: diva2:1350614
Note

QC 20191025

Available from: 2019-09-11 Created: 2019-09-11 Last updated: 2019-10-25Bibliographically approved

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