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V2X communications plays a significant role in increasing traffic safety andefficiency by enabling vehicles to exchange their status information with othervehicles and traffic entities in their proximity. In this regard, twotechnologies emerged as the main contenders for enabling V2X communicationswhich have stringent requirements in terms of latency and reliability due totheir apparent safety criticality. The first one is the DSRC standard (referredto as ITS-G5 in Europe) that is well researched since 20 years and has attainedenough technical maturity for current deployment. The second one is therelatively new CV2X standard that is nevertheless, based on the 3GPP standardfamily that have successful deployments in almost every corner of the globe. Inthis work, we compare the link level performance of the PHY protocols for boththe technologies for different vehicular fading channel models. To this end, weconstruct and simulate the PHY pipelines and show the performance results bymeans of BLER} versus SNR graphs. Our investigations show that CV2X performsbetter than ITS-G5 for almost all the considered channel models due to betterchannel coding and estimation schemes.

Link Level Performance Comparison of C-V2X and ITS-G5 for Vehicular Channel Models