Statistical analysis of interference in cognitive networks

In this paper, the closed expressions for statistics, such as outage probability (OP), level crossing rate (LCR) and average fade duration (AFD) of multiple interferers in Nakagami-m fading channels in cognitive networks are presented. Besides, the interference-tolerant scenario is considered that the spatially Poisson distributed interfering secondary (unlicensed) terminals share the same frequency bands with the primary devices and are not allowed to transmit within the interference region of the primary (licensed) users. Numerical results show the effects of channel characteristics, velocity and interference region radius on the statistics. And Nakagami parameter has less effect than velocity on LCR but affects AFD more than velocity.