A Novel Terminal Aided Synchronization Scheme for Intelligent Transportation Systems with Vehicle-to-Anything (V2X) Communications

Synchronization, as a critical factor of modern wireless communication systems, has attracted close research attention recent years. For the vehicle-to-anything (V2X) communication in 5G new radio, synchronization faces severe challenges due to the extremely low latency and high reliability requirements. In this paper, a terminal aided synchronization scheme is proposed for the vehicle platooning in V2X communication. The shared information, such as N-ID(SL) from other cooperative vehicles, are utilized to recover the original transmitted sidelink synchronization signals. The synchronization ID detection probability is therefore improved by 49.6% compared to conventional schemes. Hardware implementation on FPGA Artix-7 AC701 board is performed of the proposed synchronization scheme and the hardware latency is reduced to 67.18 mu s compared to 968,654.85 mu s in conventional schemes.