  Autonomous driving is usually recognized as a promising technology to replace
human drivers in the near future. To guarantee the safety performance in the
daily life scenario, multiple-car intelligence with high quality inter-vehicle
communication capability is necessary in general. In this paper, to figure out
the potential practical issues in the vehicle-to-vehicle transmission, we
present a software defined radio platform for V2V communication using universal
software radio peripheral (USRP). Based on the LTE framework, we modify the
frame structure, the signal processing mechanisms and the resource allocation
schemes to emulate the updated LTE-V standard and generate the corresponding
numerical results based on the real measured signals. As shown through some
empirical studies, one to four dB back-off is in general required to guarantee
the reliability performance for V2V communication environments.
