# gr-LTE freq sync and constellation plot

**URL:** <https://www.ruby-forum.com/t/gr-lte-freq-sync-and-constellation-plot/241285>\
**Category:** GNU Radio\
**Created:** [May 22, 2014, 6:36am UTC](https://www.ruby-forum.com/t/gr-lte-freq-sync-and-constellation-plot/241285 "2014-05-22T06:36:06Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [May 22, 2014, 6:36am UTC](https://www.ruby-forum.com/t/gr-lte-freq-sync-and-constellation-plot/241285/1 "2014-05-22T06:36:06Z")

</div>

Hello,  
I have captured IQ samples using USRP N210 and saved it as .dat file but  
when i gave it as input to gr-lte its not decoding.It shows like

sync\_ffofrac\_lte\_sync\_frequency\_c\_0 ASYNC! new offset = 3426 old  
offset = 3423 samp\_num = 7019  
ofdm\_lte\_remove\_cp\_cvc\_0 OUT of sync!  
Continues…  
Solution?  
How to get constellation plot after layer mapping in PBCH decode?  
Thank You,  
Arvind.