top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration

Facebook Login
Site Registration

Why does lte support only 64 preamble sequences ?

+5 votes

What calculation or logic behind to derive this 64 ?

posted Nov 5, 2014 by Neeraj Mishra

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

1 Answer

+2 votes

Hi neeraj,

Preambles mean its a sequence or signature. with one rootsequenceindex UE can able to generate MAX of 6 preambles by doing simple cyclic shift.If want to generate more than that preambles it is complex to generate preamble sequence ,that is the reason it is restricted to 64.

answer Jun 1, 2016 by Jaganathan
Similar Questions
+4 votes

Actually there are three resource allocation types being used to allocate resources to UE(s) in downlink and uplink. For downlink all three (Type 0, 1 and 2) used but for uplink only resource allocation type 2 is being used.

+3 votes

I found that LTE supports up to 64 QAM modulation scheme . From where this limitation comes out ?

+1 vote

why QPSK modulation scheme is used for all control channels in LTE ?

+3 votes

EnodeB considers CQI feedback from the UE before creating the transport block.
As per my understanding PUCCH resource allocation is not very dynamic. In this case how UE decide to use a specific MCS (Modulation and Coding Scheme) while using PUCCH channel ?

Contact Us
+91 9880187415
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Karnataka INDIA.