# PN correlator and GLFSR source purpose and how to use it

**URL:** <https://www.ruby-forum.com/t/pn-correlator-and-glfsr-source-purpose-and-how-to-use-it/241253>\
**Category:** GNU Radio\
**Created:** [May 20, 2014, 9:26pm UTC](https://www.ruby-forum.com/t/pn-correlator-and-glfsr-source-purpose-and-how-to-use-it/241253 "2014-05-20T21:26:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [May 20, 2014, 9:26pm UTC](https://www.ruby-forum.com/t/pn-correlator-and-glfsr-source-purpose-and-how-to-use-it/241253/1 "2014-05-20T21:26:43Z")

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Hi all,  
I am using GLFSR source and PN correlaor blocks in my tranceiver for  
frame  
synchronization. My Question is that does PN correlator is used for  
frame  
synchronization? if yes then how to use these blocks.

My flow graph is attached with this mail.You can see that I have used  
the  
GLFSR source and PN correlator for synchronization but using like this  
its  
not working means my frame have some delay. and please confirm me that  
PN  
correlator is used for frame synchronization?

any reply will be much appreciated I am asking these easy questions  
because  
I am in learning phase.  
regards,  
Irfan U.