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[Discuss-gnuradio] Synchronization within the same USRP

From: Aldalbahi, Adel
Subject: [Discuss-gnuradio] Synchronization within the same USRP
Date: Fri, 14 Oct 2016 21:36:22 -0600

Dear All, 

I have been working with a single USRP N210 to measure BER using BER Error block. The communication is working perfect and I can transmit and receive. Also I can see the constellation points of 4PSK at the receiver. One thing I was totally confused about is that how to synchronize both tx and rx blocks using single usrp? I used polyphase clock, equalizer, also costa loop but still I lose synchronization after few seconds? is there is anyway or example I can look at to help me solve this problem? since I know I have phase offsite because of the channel but how to solve this ? How to solve the delay problem  between tx and rx?  

Thank you in advance. 

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