# The Second Order Scattering Fading Model with Fluctuating Line-of-Sight

## TL;DR

This paper introduces a generalized second-order scattering fading model that incorporates fluctuating line-of-sight components, simplifying its mathematical complexity and enabling detailed performance analysis of wireless communication systems.

## Contribution

It proposes a new fading model with fluctuating LOS components, providing closed-form statistical expressions and facilitating performance evaluation.

## Key findings

- Closed-form probability and cumulative distribution functions
- Enhanced model flexibility with additional parameters
- Insights into the impact of fading parameters on system performance

## Abstract

We present a generalization of the notoriously unwieldy second-order scattering fading model, which is helpful to alleviate its mathematical complexity while providing an additional degree of freedom. This is accomplished by allowing its dominant specular component associated to line-of-sight propagation to randomly fluctuate. The statistical characterization of the newly proposed model is carried out, providing closed-form expressions for its probability and cumulative distribution functions, as well as for its generalized Laplace-domain statistics and raw moments. We exemplify how performance analysis can be done in this scenario, and discuss the role of the fading model parameters on system performance.