RIDOUANI, Mohammed École Supérieure de Technologie-EST - Computer Sciences Department, Morocco

Outage Probability Analysis of Cognitive Transmissions: Impact of Spectrum Sensing Overhead and Interference Constraints

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Cognitive radio is a promising technology that uses radio spectrum opportunistically and efficiently. In this paper, we propose a scheme that enhances the cognitive source’s data transmission by combination underlay and interweave approaches, and we analyze the outage probability of cognitive transmission under spectrum sensing overhead and interference constraints and over Rayleigh fading channels. A closed-form of outage probability for the proposed scheme is derived. Computer simulations show that the reduction of outage probability can be achieved when spectrum sensing overhead is near 0 or 1, and the performance system increases both as interference constraints increase and when the bandwidth is heavily used by primary source.

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Cognitive radio , spectrum sensing overhead , interference constraints , interweave approach , underlay approach , outage probability

Mediterranean Telecommunications Journal

72