I have nrf52833 as Tx. Ialso have nrf52833+ antenna array as Rx. I want to send CTE data, implement IQ sampling and view AOA for implementing direction finding. Kindly assist with some reference code that i can test.
I have nrf52833 as Tx. Ialso have nrf52833+ antenna array as Rx. I want to send CTE data, implement IQ sampling and view AOA for implementing direction finding. Kindly assist with some reference code that i can test.
Hi again RIDHIMA,
The transmitting sample (direction_finding_connectionless_tx) is actually made to use AOD by default. So if you want to try AOA you need to start off by editing line 61 in the main file:
.cte_type = BT_HCI_LE_AOA_CTE,
Then you need to flash this modified sample to one nr52833Dk and the rx sample to another one, with the antenna connected. You should then see the AOA data received on the rx side. For an overview of how far we've gotten now, see the illustration below.
Sadly, we do not have a publicly available angle algorithm that works with these samples. If you want to view the angles themselves you need to create the algorithm to do so, using the equations and material available here and in our whitepaper on DF (See the illustration below).
The configurations you referred to on page 16 is not another way of implementing direction finding. The configurations in the whitepaper are helpful if you want to change something from the default settings, but I don't think you need to. The samples are made to work out of the box.
Best regards,
Elfving
