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Re: [Discuss-gnuradio] Newbie question on USRP2, synchronization done by

From: Tom Rondeau
Subject: Re: [Discuss-gnuradio] Newbie question on USRP2, synchronization done by the FPGA?,
Date: Wed, 1 Sep 2010 21:03:08 -0400

On Wed, Sep 1, 2010 at 8:52 PM, Sam Keene <address@hidden> wrote:

Thanks for the reply. I guess I am just trying to better understand this diagram:


I understand what the decimating filters are doing, but I'm a little unclear about the NCO. Does this component phase and frequency lock for me, or will I have to code that myself?



No, there is no freq/phase lock in the USRP/USRP2. We have to do this in software.

You can reference the dbpsk and dqpsk blocks that we have already written or the newer dbpsk2/dqpsk2 blocks that use newer techniques for the phase, frequency, and timing locks.


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