Re: [Discuss-gnuradio] phase synchronizing USRPs in GNU Radio

[Ralph A. Schmid, dk5ras]

As far as I know this phase error is caused by the PLL concept that does not care for the phase of the reference to build the output signal always with reproducible phase relation to the reference.  

 

So you will have to find some workaround like an auto align procedure, or use another transceiver concept that keeps the phase consistent through the whole path, from the reference to the output carrier.

 

Ralph.

 

 

From: address@hidden [mailto:address@hidden On Behalf Of sarankumar
Sent: Monday, September 15, 2014 7:27 AM
To: GNURadio Discussion List
Subject: [Discuss-gnuradio] phase synchronizing USRPs in GNU Radio

 

Hi all,

 

I am trying to phase synchronize multiple usrp's using 10 MHz reference and 1 pps. I was able to get them synchronised but with constant phase offset between. But every time I retune or rerun the flowgraph the phase offset changes. how can I estimate and compensate the phase offset between USRPs without rerunning or retuning USRP? The purpose is to do DOA estimation. I use WBX daughterboard and USRP N210.

 

Regards,

Saran