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.