LTE下行参考信号和上行参考信号有哪些

详见36.211：

5.5 Reference signals
Two types of uplink reference signals aresupported:
- Demodulationreference signal, associated with transmission of PUSCH or PUCCH
- Soundingreference signal, not associated with transmission of PUSCH or PUCCH

6.10 Reference signals
Five types of downlink reference signalsare defined:
- Cell-specificreference signals (CRS)
- MBSFN referencesignals
- UE-specificreference signals (DM-RS)
- Positioningreference signals (PRS)
- CSIreference signals (CSI-RS)