IQ Sampling AoD

[ChristineA]

I am experimenting with sampling IQ at the payload in AoD mode. Are there any differences in the configuration of the receiver in AoA mode as seen in the direction finding whitepaper to the configuration of the receiver in AoD mode?

I followed the procedures in the whitepaper except for the CTEINLINECONF and antenna switching as I'll sample IQ from advertisement packets with no CTEInfo (and no CTE) and use only one antenna. However, when I check DFEPACKET.AMOUNT, I get 0 samples for each packet. Did I miss anything to actually start IQ sampling?

[Simonr]

Hi

Okay, I see. It should be possible to do IQ sampling within the payload, but we don't have libraries/solutions doin this, so you will be on your own with in-payload DFE I'm afraid. All necessary information should be covered in the Direction Finding and radio sections of the nRF52833 product specification. Some important notes to this approach:

• You should be able to check resulting timing by checking the antenna switch pattern
• AGC is normally disabled, but for in-payload DFE this will always be active
• The sampling will be related to the ADDRESS event and you will need to calculate the delay you want from this point in the packet yourself.

Best regards,

Simon