Hi Experts,
Does DMRS position type a means it will be symbol 2 or 3 in time domain?
What about frequency domain?
And will it use all slots or only the first slot of radio frame?
What it is for nrpbch or other purpose and same type b?
Type A means it is on symbol 2 or 3 if DMRS is single symbol, in frequency domain it is on alternating subcarriers if it is type 1, it is separated by 6 SCs with DMRS on 2 consecutive SCs if it is type 2.
And purpose of this DMRS?
Channel estimation is main purpose
You can refer this video for more understanding:
Yes but it can do five things as pbch, pdcch, pdsch, pucch and pusch decoding.
Yes channel estimation and power saving.
Benefit as not in lte as it does not have to be transmitted unnecessarily.
Ok I will check that link, thanks.
DMRS is transmitted with all of them.
Yes in NR it’s more sparse than LTE hence reducing the overhead.
Yes, but does this type a takes all second symbols of radio frame if position2 of each rb in time domain like suppose scs60 is there we have 40 slots so all 40 slots will use symbol 2 in type position2?
Yes, correct.