# Problem of frame synchronization

**URL:** <https://www.ruby-forum.com/t/problem-of-frame-synchronization/229957>\
**Category:** GNU Radio\
**Created:** [May 23, 2014, 6:03pm UTC](https://www.ruby-forum.com/t/problem-of-frame-synchronization/229957 "2014-05-23T18:03:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jason\_sam](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/7993a0/32.png) [@jason\_sam](https://www.ruby-forum.com/u/jason_sam)\
**Post date:** [May 23, 2014, 6:03pm UTC](https://www.ruby-forum.com/t/problem-of-frame-synchronization/229957/1 "2014-05-23T18:03:23Z")

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Hi all,  
I am designing a QPSK transceiver using chunks to symbols and  
constellation  
decoder I have done the timing synchronization and carrier phase  
synchronization at receiver but I have some delay in my received data  
means  
at the start I have some garbage values  
and then original data is started so I want to remove this delay please  
help me how can I remove this delay I have searched to find some grc  
blocks  
for frame synchronization but I have not succeeded.  
I have worked on many blocks like simple for frame synchronization

1. framer and simple correlator
2. GLFSR source and PN correlator
3. Header/payload demux and stream to taged stream block
4. packet encoder and decoder

but I cannot used these successfully reasons are because I have no much  
experience in GNU Radio or may be these blocks are not  
designed for frame synchronization and frame delays

GRC pictures are attached of my trancseiver and header payload demux  
method of frame synchronization

any help will be nuch appreciated

best regards,  
Irfan U.