Modeling Cellular Networks in Fading Environments with Dominant Specular Components

TL;DR

This paper introduces a new tractable model for cellular networks that incorporates generalized two-ray (GTR) fading, explicitly accounting for dominant specular components, thereby better representing realistic outdoor and indoor wireless channels.

Contribution

It presents a novel GTR fading model within stochastic geometry analysis, capturing dominant specular components and unifying various fading scenarios including Rayleigh and Rician.

Findings

GTR fading model captures diverse real-world fading environments.

Explicit inclusion of DSCs impacts average spectral efficiency.

Model unifies multiple fading types in a single framework.

Abstract

Stochastic geometry (SG) has been widely accepted as a fundamental tool for modeling and analyzing cellular networks. However, the fading models used with SG analysis are mainly confined to the simplistic Rayleigh fading, which is extended to the Nakagami-m fading in some special cases. However, neither the Rayleigh nor the Nakagami-m accounts for dominant specular components (DSCs) which may appear in realistic fading channels. In this paper, we present a tractable model for cellular networks with generalized two-ray (GTR) fading channel. The GTR fading explicitly accounts for two DSCs in addition to the diffuse components and offers high flexibility to capture diverse fading channels that appear in realistic outdoor/indoor wireless communication scenarios. It also encompasses the famous Rayleigh and Rician fading as special cases. To this end, the prominent effect of DSCs is highlighted in terms of average spectral efficiency.