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Interference and Outage in Poisson Cognitive Networks

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2 Author(s)
Chia-han Lee ; Res. Center for Inf. Technol. Innovation, Acad. Sinica, Taipei, Taiwan ; Haenggi, M.

Consider a cognitive radio network with two types of users: primary users (PUs) and cognitive users (CUs), whose locations follow two independent Poisson point processes. The cognitive users follow the policy that a cognitive transmitter is active only when it is outside the primary user exclusion regions. We found that under this setup the active cognitive users form a point process called the Poisson hole process. Due to the interaction between the primary users and the cognitive users through exclusion regions, an exact calculation of the interference and the outage probability seems unfeasible. Instead, two different approaches are taken to tackle this problem. First, bounds for the interference (in the form of Laplace transforms) and the outage probability are derived, and second, it is shown how to use a Poisson cluster process to model the interference in this kind of network. Furthermore, the bipolar network model with different exclusion region settings is analyzed.

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Wireless Communications, IEEE Transactions on  (Volume:11 ,  Issue: 4 )