Title: Outage analysis in presence of correlated interferers in a cognitive radio – CDMA network

Authors: Sanjay Dhar Roy; Sumit Kundu

Addresses: Department of Electronics and Communication Engineering, National Institute of Technology, Durgapur – 713209, India. ' Department of Electronics and Communication Engineering, National Institute of Technology, Durgapur – 713209, India

Abstract: In this paper, the outage performance of a primary user (PU) is evaluated analytically in presence of a large number of secondary users (SUs) in an underlay spectrum sharing architecture. We consider cognitive users in ad hoc mode using the spectrum licensed for a cellular CDMA network. We develop an analytical framework for evaluation of downlink interference in our proposed cognitive radio CDMA (CR-CDMA) networking model. A closed form expression for the probability of outage for a PU assuming correlation amongst interferences caused by co-channel BSs and SUs has been derived. We study the impact of SUs and several other parameters (of channel and network) on the outage probability for a PU. Analytical results are validated with simulation results.

Keywords: cognitive radio networks; cellular CDMA networks; outage probability; correlated interferers; underlay spectrum sharing; secondary users; networking models; simulation.

DOI: 10.1504/IJCNDS.2012.046349

International Journal of Communication Networks and Distributed Systems, 2012 Vol.8 No.3/4, pp.332 - 345

Accepted: 04 Mar 2011
Published online: 30 Aug 2014 *

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