Comparison of 60 GHz and 80 GHz Vehicle-to-Vehicle Channels Using Delay and Doppler Characteristics

TL;DR

This study compares 60 GHz and 80 GHz vehicle-to-vehicle channels in high-mobility scenarios, analyzing delay and Doppler characteristics to understand their similarities and differences for V2V communication.

Contribution

It provides a direct comparison of V2V channel characteristics at 60 GHz and 80 GHz under identical conditions, highlighting subtle differences in delay and Doppler spreads.

Findings

80 GHz shows slightly greater RMS delay and Doppler spreads.

Both bands have similar overall channel characteristics.

Stationarity regions are shorter at 80 GHz.

Abstract

The aim of this paper is to provide a comparison of channel characteristics for vehicle-to-vehicle (V2V) communication at 60 GHz and 80 GHz frequency bands in a high-mobility scenario where two vehicles pass each other in opposite directions. The study is based on measurements of the time-varying channel impulse response capturing the behavior of multi-path propagation during vehicle motion. By directly comparing these two frequency bands under identical measurement conditions, we attempt to quantify the differences in power delay profile, root mean square (RMS) delay spread, RMS Doppler spread, and intervals (regions) of stationarity in time domain. The results show that these bands do not differ significantly, but the 80 GHz band exhibits somewhat greater RMS delay spread and RMS Doppler spread when calculated over the entire delay-Doppler spectrum, and conversely exhibits shorter stationarity regions. However, the characteristics of the measurement setup in the two bands and their influence on comparative measurements must be considered. In particular, attention must be paid to the impact of antennas.