Performance Analysis of Energy Detector Over α − μ Fading Channels with Selection Combining
Abstract
Energy detection is the most widely used technique in cognitive radio networks
to enable opportunistic spectrum access. In this paper, the problem of energy detection of
an unknown deterministic signal over fading channels is revisited. More particularly, a new
closed-form mathematical expression is derived for the average probability of detection of
the energy detector (ED) over α − μ generalized fading channels with selection combining
(SC) diversity reception. The derived expression is general and includes as special cases
Nakagami-m, Weibull, Gamma, Rayleigh and Exponential distributions. This expression is
useful to quantify the performance improvement of the ED with SC diversity reception.