top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

What is difference in Long Preamble vs Short Preamble in NR?

+1 vote
57 views
What is difference in Long Preamble vs Short Preamble in NR?
posted May 27 by Himani

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

+1 vote

In NR total 13 PRACH formats divided into long & short preambles.
Long preambles have a sequence of length LRA=839, short have a sequence of length LRA=139.
For Long preambles format 0,1,2,3 used, in Short preambles format A1, A2, A3, B1, B2, B3, B4, C0, C2, including mixed formats A1/B1, A2/B2, and A3/B3 used.
Subcarrier spacing supported for Long preambles are 1.25 & 5 khz, whereas for Short preambles supported 15,30,60,120 khz.
Long preambles used for FR1 ,short preambles used for both FR1 & FR2.

answer May 29 by Mohit Mohan
Similar Questions
+2 votes

If someone has knows about the radio connection between UE and 5G NR then please explain it.
Thanks in advance.

+1 vote

In LTE RACH preamble is transmitted in entire 6RB's and 14 OFDMA symbol.
But in NR RA-RNTI calculation specification shows RA-RNTI= 1 + s_id + 14 × t_id + 14 × 80 × f_id + 14 × 80 × 8 × ul_carrier_id

Where s_id is OFDMA symbol position. 0=<s_id<=14. Does this means preamble can be transmitted any of the 14 OFDMA symbol.

Contact Us
+91 9880187415
sales@queryhome.net
support@queryhome.net
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Bangalore-560102
Karnataka INDIA.
QUERY HOME
...