Small-Scale Fading Analysis of the Vehicular-to-Vehicular Channel inside Tunnels

Susana Loredo,Adrián Del Castillo,Lorenzo Rubio,Juan Reig,Vicent M Rodrigo-Peñarrocha,Herman Fernández

doi:10.1155/2017/1987437

Abstract

We present a small-scale fading analysis of the vehicular-to-vehicular (V2V) propagation channel at 5.9 GHz when both the transmitter (Tx) and the receiver (Rx) vehicles are inside a tunnel and are driving in the same direction. This analysis is based on channel measurements carried out at different tunnels under real road traffic conditions. The Rice distribution has been adopted to fit the empirical cumulative distribution function (CDF). A comparison of theKfactor values inside and outside the tunnels shows differences in the small-scale fading behavior, with theKvalues derived from the measurements being lower inside the tunnels. Since there are so far few published results for these confined environments, the results obtained can be useful for the deployment of V2V communication systems inside tunnels.

Highlights

Intelligent transportation systems (ITS) aim to improve safety and comfort of drivers and passengers through the integration of information and communication technologies both inside vehicles and in roadside infrastructure
The results have been derived from narrowband channel measurements collected in four different tunnels under real road traffic conditions
The Rice distribution has been proven to provide a reasonable fit to the measured small-scale fading when the size of the temporal bin is properly chosen

Summary

Introduction

Intelligent transportation systems (ITS) aim to improve safety and comfort of drivers and passengers through the integration of information and communication technologies both inside vehicles and in roadside infrastructure. One of the key features for efficient implementation of such vehicular communication systems is to have a good characterization and a deep understanding of the V2V propagation channel. Under the ITS concept, the understanding of the V2V channel characteristics in these peculiar environments is essential for successful deployment of future safety applications based on wireless communication technologies. In this sense, we present a statistical analysis of the small-scale fading of the V2V channel inside tunnels from experimental channel measurements. Included channel measurements outside tunnels, so that a comparison inside/outside can be made.

Channel Measurements

20 Tunnel section

Conclusion