# What is the sub carrier spacing used in NR RACH transmission?

+1 vote
66 views
What is the sub carrier spacing used in NR RACH transmission?
posted Feb 12

+1 vote

I think the subcarrier spacing depend on PRACH preamble sequence.As per 3gpp specs
Subcarrier spacing 1.25 or 5 Khz used for long sequence (L_RA = 839).
subcarrier spacing 15,30,60 or 120 Khz for short sequence (L_RA = 139) .
where L_RA 839 or 139 depending on the PRACH preamble format .

Similar Questions
+1 vote

MCS,RB to TB size mapping is common for all the sub carrier spacing or is it different each configuration?

+1 vote

This can be usefull when UE's are in different location and different noise ratio? Is it possible