Method for electricity measurement for V2V communications in wireless communication system, and device for same

A device communicating for vehicle-to-everything (V2X) communication, the device comprising:

• a processor;
• a memory coupled with the processor and storing information to operate the processor;
• and
• a RF unit coupled with the processor,
• wherein the processor is configured for:
• mapping a synchronization signal and a demodulation reference signal (DMRS) associated with a physical sidelink broadcast channel (PSBCH) in a time domain unit for the V2X communication;
• and
• transmitting a signal comprising the synchronization signal and the DMRS to a receiving end,
• wherein the DMRS is mapped to resource elements on three symbols in the time domain unit,
• wherein the DMRS uses two orthogonal cover codes (OCCs) each having three components,
• wherein the two OCCs comprise a first OCC and a second OCC,
• wherein the DMRS uses the first OCC when an identifier of the synchronization signal is even, and
• wherein the DMRS uses the second OCC when the identifier of the synchronization signal is odd.