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A Step Towards Enhancing Spectrum Utilization by Implementing a Spectrum Sensing Cognitive Radio Using an RTL-SDR

Scott O. Idubor(1), Etinosa Noma-Osaghae(2), Kingsley O. Ogbeide(3), Kennedy Okokpujie(4*)

(1) University of Benin, Benin City, Edo State, Nigeria
(2) Covenant University, Nigeria
(3) University of Benin, Benin City, Edo State, Nigeria
(4) Covenant University, Nigeria
(*) Corresponding author


DOI: https://doi.org/10.15866/irecap.v8i5.13954

Abstract


In this paper, a spectrum sensing cognitive radio using the RTL-SDR interfaced with Simulink in MATLAB was developed. It performed spectrum sensing and signal prediction between the ranges of 25MHz to 1.5GHz, the tuner range of the RTL-SDR. The RF spectrum occupancy was explored by choosing specific centre frequencies between 25MHz to 1.5GHz in real time using the RTL-SDR. Tests were carried out in real time to ascertain the workability and efficiency of the RTL-SDR cognitive radio. The efficiency of the cognitive radio reduced as the false alarm probability increased. The cognitive radio’s efficiency also reduced in high noise signal floors.
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Keywords


Software Defined Radio; Spectrum Sensing; Cognitive Radio; Primary User; Secondary User; False Alarm Probability (Pfa); Probability of Detection (Pd); Probability of Miss Detection (Pmd)

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