DMRS (PDSCH, 6GR)
The group of the PDSCH tab. All parameters are auto-coupled — see Auto and Manual Parameter Coupling.
DMRS Nid Source - Selects where the DMRS scrambling identity comes from: Cell ID (derived from the cell ID) or From RRC (taken from Nid0 / Nid1, selected between by DMRS nSCID).
Default: Cell ID
Choices: Cell ID, From RRC
DMRS nSCID - Sets the DMRS scrambling initialization selector nSCID, which chooses between Nid0 and Nid1.
Default: 0
Range: 0 to 1
Nid0 / Nid1 - One row holding two values, the two DMRS scrambling identities (the higher-layer and parameters). DMRS nSCID selects which one applies. Both are used only while DMRS Nid Source is From RRC.
Default: 0 for both
Range: 0 to 65535
DMRS Configuration - Sets the DMRS configuration type (3GPP dmrs-Type). Type2 doubles the number of DMRS ports available, and allows a third CDM group without data.
Default: Type1
Choices: Type1, Type2
DMRS Duration / Max Length - One row holding two values. DMRS Duration sets whether a DMRS occasion spans one symbol (Single-Symbol) or two (Double-Symbol); DMRS Max Length sets the maximum DMRS length in symbols.
Default: Single-Symbol, max length 1
Choices: Single-Symbol, Double-Symbol. Max length 1, 2
DMRS TypeA Pos / Add Pos - One row holding two values. DMRS TypeA Pos sets the position of the first DMRS symbol for mapping type A; DMRS Add Pos sets the number and position of additional DMRS occasions (pos0 to pos3 per 3GPP TS Technical Specification 38.211).
Default: Pos2 and Pos0
Choices: TypeA Pos Pos2, Pos3. Add Pos Pos0, Pos1, Pos2, Pos3
DMRS Power Boosting - Sets the DMRS power boost relative to the data.
Default: Auto — follows the CDM groups: 0 dB for 1 group, 3 dB for 2 groups, 3 dB (Type1) or 4.77 dB (Type2) for 3 groups
Range: -30 to 30 dB
Enhanced DMRS Type - Enables the enhanced DMRS type.
Default: Cleared
DMRS-Downlink - Uses the downlink DMRS configuration described in 3GPP Release 16, in which nSCID is applied per antenna port rather than as a single carrier-wide value.
Default: Cleared
See Also
