Can I use CTE feature with single antenna by using nRF52811 + nRF52840 DK?

[Jinew]

Hello, I'm a researcher.

I wanna use Bluetooth CTE(Constant Tone Extension) feature with 1-antenna TX + 1-antenna RX.

I have seen some articles that nRF52840 DK does not support Direction finding HW feature?

But, I just need to use 1:1 CTE sending and receiving.

Shortly, if I buy 2 sets(nRF52811 + nRF52840 DK), can one set send CTE packets and the other set receive these packets? and Can I get the I/Q samples?

p.s. Does nRF52833 DK support that? Which DK do you recommand?

Thanks.

[ketiljo]

Only the nRF52811 and nRF52833 supports CTE (and direction finding), not the nRF52840

[Jinew]

Do you mean that i buy nRF52833 DK?

My intention is nRF52811+nRF52833 DK vs. nRF52833 DK.

[ketiljo]

It doesn't matter, only the nRF52811 and the nRF52833 can send or receive CTE. Not sure why you want to do this, there's no angle information if you have only one antenna. 

[JJokelainen]

I am also interested in this. I already own a nRF52840DK and would like to start experimenting with direction finding with nRF52833DK. I was hoping the requirement for direction finding in AoA would be only to the receiver since if I am not mistaken, sending CTE does not require anything special in the hardware side. Too bad if there is no way of using direction finding features with a 5.0 device sender and 5.1 with three antennas as a receiver, this would have opened a world of possibilities with such a large base of 5.0 devices around :/

[ketiljo]

The transmitter needs to be able to send a CTE packet, the nRF52840 can't do that. So you will need to use a 833 or 811 on either side of the link.