Channel coding adoption versus increasing sensing time in secondary service to manage the effect of imperfect spectrum sensing in cognitive radio networks

Haddadi, Sadjad and Saeedi, Hamid and Navaie, Keivan (2013) Channel coding adoption versus increasing sensing time in secondary service to manage the effect of imperfect spectrum sensing in cognitive radio networks. In: Communication and Information Theory (IWCIT), 2013 Iran Workshop on. IEEE, GBR, pp. 1-5. ISBN 9781467350204

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Abstract

In this paper we consider an overlay cognitive network in which to guarantee a Quality of Service (QoS) for the primary users, a maximum probability of collision is enforced to secondary service. When collision, caused by imperfect spectrum sensing, happens, it results in increasing error rate in both primary and secondary systems. While such degradation in primary service conforms with QoS requirements of that service, this may not be acceptable from secondary user perspective. Such degradation can be dealt with in secondary service either by employing channel coding techniques at the expense of effective rate reduction or increasing the sensing time to reduce the collision probability. This results in the reduction of the data transmission time which also results in the reduction of effective data rate for secondary users. In this paper, we compare these two cases and show that using rate-compatible Low-Density Parity-Check codes, the effective data rate for the coded case can be significantly more than that of the case without channel coding while exhibiting a considerably better performance.

Item Type: Contribution in Book/Report/Proceedings
Subjects:
Departments: Faculty of Science and Technology > School of Computing & Communications
ID Code: 72653
Deposited By: ep_importer_pure
Deposited On: 27 Jan 2015 08:24
Refereed?: Yes
Published?: Published
Last Modified: 07 Jan 2020 03:25
URI: https://eprints.lancs.ac.uk/id/eprint/72653

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