# Channel Modeling for Over-water Communications

## TL;DR

This paper discusses the importance of accurately modeling over-water communication channels, focusing on the parabolic equation method to analyze radio wave propagation over variable terrain and atmospheric conditions.

## Contribution

It provides an overview of the PE method and aims to develop a tool for advanced analysis of over-water channels considering spatial and temporal dynamics.

## Key findings

- PE method effectively models over-water radio wave propagation
- Developed a mathematical understanding of PE for over-water channels
- Proposed a tool for advanced channel analysis

## Abstract

Over-water communication has been an important research field of wireless communications and radar. Since there are so many parameters in this environment that are changing continuously in the spatial and temporal domains such as weather and sea surface parameters. Hence, accurately modeling the over-water propagation channel is very crucial and challenging at the same time. In this report, we will shed some light on the parabolic equation (PE) method which is one of the main methods used to model the radio waves propagation over variable terrain and through the homogeneous and inhomogeneous atmosphere. Besides ray-tracing, PE is among the most widely used approaches nowadays for deterministically analyze over-water channels. We are trying to pave the way for better understanding of the mathematical background for the PE and develop a tool to perform advanced analysis for the over-water communication channel taking into consideration its spatial and temporal behavior.