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

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Publication date2013
Host publicationCommunication and Information Theory (IWCIT), 2013 Iran Workshop on
Place of PublicationNew York
PublisherIEEE
Pages1-5
Number of pages5
ISBN (Electronic)9781467350235
ISBN (Print)9781467350204
Original languageEnglish
EventIran Workshop on Communication and Information Theory (IWCIT) - Tehran, United Kingdom
Duration: 8/05/20139/05/2013

Conference

ConferenceIran Workshop on Communication and Information Theory (IWCIT)
CountryUnited Kingdom
Period8/05/139/05/13

Conference

ConferenceIran Workshop on Communication and Information Theory (IWCIT)
CountryUnited Kingdom
Period8/05/139/05/13

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.