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Soft Real Time Implementation of a Cognitive Radio Testbed for Frequency Hopping Primary Satisfying QoS Requirements

Jain, Adarsh and Sharma, Vinod and Amrutur, Bharadwaj (2014) Soft Real Time Implementation of a Cognitive Radio Testbed for Frequency Hopping Primary Satisfying QoS Requirements. In: 20th National Conference on Communications (NCC), FEB 28-MAR 02, 2014, Kanpur, INDIA.

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Official URL: http://dx.doi.org/ 10.1109/NCC.2014.6811248


The Cognitive Radio (CR) is a promising technology which provides a novel way to subjugate the issue of spectrum underutilization caused due to the fixed spectrum assignment policies. In this paper we report the design and implementation of a soft-real time CR MAC, consisting of multiple secondary users, in a frequency hopping (Fit) primary scenario. This MAC is capable of sensing the spectrum and dynamically allocating the available frequency bands to multiple CR users based on their QoS requirements. As the primary is continuously hopping, a method has also been implemented to detect the hop instant of the primary network. Synchronization usually requires real time support, however we have been able to achieve this with a soft-real time technique which enables a fully software implementation of CR MAC layer. We demonstrate the wireless transmission and reception of video over this CR testbed through opportunistic spectrum access. The experiments carried out use an open source software defined radio package called GNU Radio and a basic radio hardware component USRP.

Item Type: Conference Proceedings
Series.: National Conference on Communications NCC
Publisher: IEEE
Additional Information: Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Keywords: Cognitive radio (CR); Frequency hopping (FH); GNU Radio; Opportunistic Spectrum Access; Python; Spectrum sensing; Universal Software Radio Peripheral (USRP)
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 19 Jul 2015 09:31
Last Modified: 19 Jul 2015 09:31
URI: http://eprints.iisc.ac.in/id/eprint/51856

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