표 3. | Table 3. C-V2X와 NR-V2X의 특성 비교 | Features comparison of C-V2X and NR-V2X.

Feature	C-V2X	NR-V2X
Comm. types	Broadcast	Broadcast, groupcast, unicast
MCS	Rel. 14: QPSK 16-QAM Rel. 15: 64-QAM	QPSK, 16-QAM, 64-QAM
Waveform	SC-FDMA	OFDM
Re-transmissions	Blind	HARQ
Feedback channel	Not available	PSFCH
Control & data multiplexing	FDM	TDM
DMRS	Four/sub-frame	Flexible
Sub-carrier spacing	15 kHz	Sub-6 GHz: 15, 30, 60 kHz mmWave: 60, 120 kHz
Scheduling interval	One sub-frame	Slot, mini-slot or multi-slot