ANT und IQ Samples

[JlaielMS]

Hallo,

I am using the CHW1010 (4*4 Antenna Matrix) as an antenna and the EVK-NORAB106 for indoor positioning (AoA). I receive 45 IQ samples and would like to know which antenna each IQ sample belongs to.

Tag: Bluetooth: Direction finding connectionless beacon

Antenna: Bluetooth: Direction finding connectionless locator.

cpunet.overlay: 

cpuapp.overlay:

IQ Samples:

...

I need help to calculate the AoA.

Regards,

Mohamed Salem Jlaiel

[tesc]

Hi,

I receive 45 IQ samples and would like to know which antenna each IQ sample belongs to.

Which IQ samples come form which antennas depends on the configuration of antenna patterns. It is not quite clear to me which antenna you have (CHW1010 seems to be an incomplete product code), nor whether or not you have changed the configuration to match with your antenna array. In any case you should find an example configuration of antenna pattern in the nrf52833dk_nrf52833.conf file.

I need help to calculate the AoA.

Unfortunately, this is a complex task which is unique for the antenna array and I am afraid we do not deliver any such algorithms. Some antenna array vendors may sell algorithms for use with their antenna arrays (such as e.g. uBlox.) Otherwise you must either develop the algorithm yourself, or find someone to develop the algorithm for you.

Regards,
Terje

[JlaielMS]

Hi Terje,

Thanks for the answer. I'm using CHW1010-ANT 2-1.0.

I had to add these lines to cpunet.overlay because pin 01.05 needs to remain active for the AoA function in my antenna.        

     

[tesc]

Hi,

Thanks for the update, and for sharing the solution!

Regards,
Terje