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[Discuss-gnuradio] Synchronizing data transmission and reception

From: kt7
Subject: [Discuss-gnuradio] Synchronizing data transmission and reception
Date: Mon, 14 Oct 2013 00:40:52 -0700 (PDT)

Hello Everyone, 

I am transmitting data from one PC (with SDR) to another PC (with another
The data is a IQ stream of 1s and 0s which will be read from a file and
modulated(QAM, QPSK or any other). 
The data will be received at the other PC, demodulated and dumped into a
file for further analysis. 

The data will be sent and received repeatedly 

The problem is that I want the data to be synchronized so that corresponding
samples can be analyzed.
I thought of using a header or something but I am not able to implement it
in GRC. 
I only want the data to be dumped from the start. 
In the beginning I am comfortable with even wired transmission(connecting Tx
to Rx directly) but main thing is synchronization. 

Please help with the flowgraph in GRC so that I can synchronize data. 

Thank you 

P.S - I tried packet encoder and decoder blocks but couldn't retrieve
synchronized data. 
I am using GNURadio 3.7.0 on a 64-bit Ubuntu 12.04

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