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Wireless Networks
Published in: Wireless Networks 7/2018

01-12-2017

A novel spectrum sensing scheme with sensing time optimization for energy-efficient CRSNs

Authors: Fanhua Kong, Zilong Jin, Jinsung Cho, Ben Lee

Published in: Wireless Networks | Issue 7/2018

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Abstract

The cognitive radio technology enables secondary users (SUs) to occupy licensed bands when primary users (PUs) are not occupy them. Spectrum sensing is a key technology for SUs to detect PUs, and the sensing time is a critical parameter for spectrum sensing performance. Optimum sensing time tradeoffs between the spectrum sensing performance and the secondary throughput. This paper proposes a novel spectrum sensing scheme that performs spectrum sensing for either one period or two periods based on the previous sensing result. Due to the energy constraint in cognitive radio sensor networks, the energy efficiency is maximized by optimizing spectrum sensing time. In order to seek the optimal sensing time, the objective function is proven to be a concave function and the Golden Section Search method is employed. Our simulation study verifies that the proposed scheme improves the network energy efficiency, especially when PUs are more active.
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Metadata
Title
A novel spectrum sensing scheme with sensing time optimization for energy-efficient CRSNs
Authors
Fanhua Kong
Zilong Jin
Jinsung Cho
Ben Lee
Publication date
01-12-2017
Publisher
Springer US
Published in
Wireless Networks / Issue 7/2018
Print ISSN: 1022-0038
Electronic ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-017-1634-7

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