What is FDM feature in 5N NR?

Hi Experts,
What is FDM feature in 5N NR?
Use of FDM


Like you have 1 slot for RACH, in frequency domain it’s divided to some parts, each part correspond to each SSB.

It’s linked with DMRS …PDSCH data with DMRS FDM
Need to check how DMRS FDM activated.
Any activation threshold for DMRS FDM or any switch.

It’s just Frequently Division multiplexing.
Like FDM of different users in same TTI, FDM of control channels with data channel.

The FDM of DMRS and PDSCH only applies to 256QAM

There is RND parameter to enable feature (rdEnableFDMPdschDmrs)