|
Reference Signals
As in LTE, many types of RS (Refernce Signal) are used in NR and most of them plays similar roles as in LTE. However, there are some important differnces between LTE RS and NR RS. The most important differences can be listed as follows :
- In NR, there is no CRS (Cell Specific Reference Signal)
- In NR, there is a new reference signals Phase Tracking Reference Signal, PBCH Reference Signal, Time/Frequency Tracking Reference Signal
List of all NR reference signal can be summarized as follows. The details of each reference signal will be posted as separate page.
|
Reference Signal
|
Functionality
|
3GPP Reference
|
|
CSI-RS
|
CSI aquisition, Beam Management
|
38.211-7.4.1.5
|
|
PDSCH DMRS
|
Required for PDSCH Demodulation
|
38.211-7.4.1.1
|
|
PUSCH DMRS
|
Required for PUSCH Demodulation
|
38.211-6.4.1.1
|
|
PDCCH DMRS
|
Required for PDCCH Demodulation
|
38.211-7.4.1.3
|
|
PUCCH DMRS
|
Required for PUCCH Demodulation
|
38.211-6.4.1.3
|
|
SRS
|
Sounding Reference Signal
|
38.211-6.4.1.4
|
|
PBCH DMRS
|
Required for PBCH Demodulation
|
38.211-7.4.1.4
|
|
PTRS
|
Used for Phase Tracking for PDSCH
|
38.211-7.4.1.2
|
|
TRS
|
Used for Time Tracking
|
38.211-7.4.1.6
|
Reference
[1]
|
|