Phase detection with nrF52

[michel]

I would like to connect n antennas (through RF switch) to a single nRF52 that would do phase comparison between the n received signals. This is something related to I/Q sampling.

What strategy would you suggest? Thx

Regards, Michel

[Øyvind Karlsen]

Hi,

This should be possible, but can be a little tricky. To be able to do this you need some metric to distinguish the difference in link quality, for example the Packet Error Rate. This is not accessible in all application, eg. when you have burst transmissions this can be tricky, so you will have to evaluate you protocol carefully beforehand.

The absolute best would be to use two nRF52 so that you can duplex, this will add a lot to your BoM though.

Best regards,

Øyvind

[michel]

Hi Øyvind,

Thank you for your response. Does it means that two nRF only can manage n antennas, or do I need one nRF per antenna? I may have more than 4 antennas to manage.

Thx Michel

[Øyvind Karlsen]

You would be receiving only 1/n of the time on each antenna with a switch, that is why you can get better performance out of one chip per antenna as you would be getting data all the time. This would make your predictions better.

[Bentleylust]

Hello,

And how the I/Q components of the received raw BLE signal can be measured within nRF52 ? How can developer get such data?