@inproceedings{eea27ec234ea4e8eab719b6a32568797,
title = "Analysis of noise uncertainty and frequency selectivity effects in wideband multimode spectrum sensing",
abstract = "The present work is devoted to the comprehensive analysis of the detrimental effects of noise uncertainty in wide-band multimode subband based spectrum sensing over frequency selective channels. Unlike existing analyses that are mostly limited to single-band detection, an analytical model is firstly formulated for the case of wide-band multimode subband based spectrum sensing, considering both noise uncertainty and frequency selectivity. This model is also extended for the case of detecting a reappearing primary user (PU), as well as for the sensing scenarios where the frequency range of a PU is unknown. Novel closed-form expressions are derived for the corresponding probabilities of false alarm and probabilities of detection. The derived expressions are subsequently employed in quantifying the effects of noise uncertainty and frequency selectivity. A subband based scheme for the sensing of multi-channel primary systems is presented and analyzed. The proposed method is found to exhibit significantly reduced sensing time and greatly improved robustness against noise uncertainty compared to the basic wideband energy detection method.",
keywords = "Cognitive radio, FFT and AFB based energy detector, Frequency selective channels, Noise uncertainty, Spectrum sensing, Wideband and multichannel communications",
author = "Sener Dikmese and Sofotasios, {Paschalis C.} and Markku Renfors and Mikko Valkama and Mounir Ghogho",
note = "Funding Information: This work was supported in part by the Tekes under the project ENCOR2, the Academy of Finland under the project no. 251138 Digitally-Enhanced RF for Cognitive Radio Devices and European Union FP7-ICT EMPhAtiC under grant agreement no. 318362 Publisher Copyright: {\textcopyright} 2015 IEEE.; 58th IEEE Global Communications Conference, GLOBECOM 2015 ; Conference date: 06-12-2015 Through 10-12-2015",
year = "2015",
doi = "10.1109/GLOCOM.2014.7417694",
language = "British English",
series = "2015 IEEE Global Communications Conference, GLOBECOM 2015",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2015 IEEE Global Communications Conference, GLOBECOM 2015",
address = "United States",
}