NR系统中下行物理信号有哪些()
A. 解调参考信号(Demodulation reference signals,DM-RS)
B. 相位跟踪参考信号(Phase-tracking reference signals,PT-RS)
C. 信道状态信息参考信号(channel-state information reference signal,CSI-RS)
D. 主同步信号(Primary synchronization signal,PSS)
E.辅同步信号(Secondary synchronization signal,SSS)