How to use antenna array board for switching and calculating the phase difference?

[Rishitha]

Hello,

I am a beginner to this Bluetooth Direction Finding Topic. I worked with nrf boards, making them work as transmitter and receiver and got the IQ samples in real time. In order to find the angle of arrival, we need phase difference between the signals. So, for that we have to use the antenna array board. My concern here is, how do I connect the antenna array board and implement the switching to find the phase difference. And I also found that we need to take care of the frequency offset between the IQ samples before getting this phase difference. I have also gone through DF whitepaper and stuck at this point Can someone tell me how to proceed with it. 

Thanks in advance.

[Amanda Hsieh]

Hi, 

You could connect the antenna array board with the nRF5340DK J1 connector. 

All the procedure is documented at: https://www.bluetooth.com/bluetooth-resources/bluetooth-direction-finding/.  I don't have other information than my colleague provided in your previous case. 

Regards,
Amanda H.

[Rishitha]

Thankyou.

I did go through the doc you sent.

Can I get more information on how to calculate the phase differences between antennas and how to adjust the frequency offset of the IQ samples. 

Can you tell me how this antenna array works exactly while taking all these slot time and sampling time and all the necessary inputs.

Thanks in advance.

[Amanda Hsieh]

You can check out this page for information.