Design and implementation of spectrum sensing for cognitive radios with a frequency-hopping primary system

Gurugopinath, Sanjeev and Akula, Raghavendra and Murthy, Chandra R and Prasanna, R and Amrutur, Bharadwaj (2015) Design and implementation of spectrum sensing for cognitive radios with a frequency-hopping primary system. In: PHYSICAL COMMUNICATION, 17 . pp. 172-184.

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Abstract

In this work, spectrum sensing for cognitive radios is considered in the presence of multiple Primary Users (PU) using frequency-hopping communication over a set of frequency bands. The detection performance of the Fast Fourier Transform (FFT) Average Ratio (FAR) algorithm is obtained in closed-form, for a given FFT size and number of PUs. The effective throughput of the Secondary Users (SU) is formulated as an optimization problem with a constraint on the maximum allowable interference on the primary network. Given the hopping period of the PUs, the sensing duration that maximizes the SU throughput is derived. The results are validated using Monte Carlo simulations. Further, an implementation of the FAR algorithm on the Lyrtech (now, Nutaq) small form factor software defined radio development platform is presented, and the performance recorded through the hardware is observed to corroborate well with that obtained through simulations, allowing for implementation losses. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	PHYSICAL COMMUNICATION
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Keywords:	Spectrum sensing; Frequency-hopping primary; FAR algorithm; Software defined radio
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	10 Feb 2016 06:05
Last Modified:	10 Feb 2016 06:05
URI:	http://eprints.iisc.ac.in/id/eprint/53212

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