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Anplus / uhd-mimo-utils

Multiple USRP Connection Example
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About the phase synchronization. #2

Open Salieri777 opened 2 years ago

Salieri777 commented 2 years ago

I want to synchronize the two antennas of the USRP x310, but I can only make their carriers the same, and the signals between the two antennas will have a random phase difference. Please help me, how can I solve it?

Anplus commented 1 year ago

As I know, only the TwinRx daughterboard can fix the carrier phase offset between two channels. Other daughterboards can not fix it. You can get more details in ettus gr-doa projects on the phase sync functionality of TwinRx.

https://github.com/EttusResearch/gr-doa

Anplus commented 1 year ago

BTW, you could measure and calibrate the phase offset every time when you power on the USRP. The phase offset between the two channels will remain the same until you re-power on. gr-doa gives a good example to do that.