  This letter proposes the use of saddle point approximation (SPA) to evaluate
the outage probability of wireless cellular networks. Unlike traditional
numerical integration-based approaches, the SPA approach relies on cumulant
generating functions (CGFs) and eliminates the need for explicit numerical
integration. The approach is generic and can be applied to a wide variety of
distributions, given that their CGFs exist. We illustrate the usefulness of SPA
on channel fading distributions such as Nakagami-$m$, Nakagami-$q$ (Hoyt), and
Rician distributions. Numerical results validate the accuracy of the proposed
SPA approach.
