Saddle Point Approximation for Outage Probability Using Cumulant Generating Functions
Information Theory
2016-11-17 v1 math.IT
Abstract
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-, Nakagami- (Hoyt), and Rician distributions. Numerical results validate the accuracy of the proposed SPA approach.
Cite
@article{arxiv.1510.05557,
title = {Saddle Point Approximation for Outage Probability Using Cumulant Generating Functions},
author = {Sudarshan Guruacharya and Hina Tabassum and Ekram Hossain},
journal= {arXiv preprint arXiv:1510.05557},
year = {2016}
}
Comments
4 pages, 4 figures, submitted to IEEE Wireless Communications Letters