Synchronization Signal Design for Millimeter-Wave Cellular V2X Communications

In this letter, a synchronization signal design technique for millimeter-wave cellular vehicle-to-everything (C-V2X) communications is proposed. The proposed vehicle synchronization signal generated using a generalized reciprocal sequence of m-sequence is shown to have desirable properties for orthogonal frequency division multiplexing (OFDM)-based C-V2X, particularly for vehicle-to-vehicle (V2V) synchronization. It is shown that the detection probabilities of synchronization signals in C-V2X are not degraded when base stations and vehicles coexist, owing to minimal interference between the synchronization signals. Moreover, the computational complexity required for signal detection and synchronization in V2V links can be significantly reduced with the proposed vehicle synchronization signal.