Statistical Analysis of Cognitive Radio Operation in a Periodic Pattern of Sensing and Transmission

A Cognitive Radio must sense the channel to detect spectrum holes. To this end, it senses the channel for $$T_S$$TS and transmits its data for $$N T_S$$NTS, if the channel is not occupied by Primary User. It is expected that the more frequent arrivals of PU, characterized by the arrival rate $$\lambda $$λ, provides CR with less opportunity. The aim of this paper is two-fold: analysis of the interaction between $$N$$N and $$\lambda $$λ, as well as the access time of CR on the one hand and study of the possible benefits a variable decreasing modulation order might provide for CR on the other. In both cases, data rate of CR and the interference it causes for PU are considered as the performance measures.

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