LAUNCHXL-CC26X2R1: AoA angle calculation from IQ samples

Alejandro Garcia Aparcero

Hi,

I'm using a BOOSTXL-AOA antenna array kit paired with a LAUNCHXL-CC26X2R1 to try to get angle of arrival data using SimpleLink CC13X2-26X2 SDK 5.20 and following the tutorials found for RTLS in SimpleLink Academy.

I'm running rtls_connectionless.py from rtls_agent, and getting succesfully IQ data exported on the CSV. The problem is that I'm not sure what samples correspond to which antenna, what antennas should I use and, in general, how to apply and calculate angle of arrival with those IQ samples. I have configured the python script and also selected the antenna switching pattern.

Could somebody shine some light on which samples to use to calculate AoA with a little more detail that the asnwers found in documentation?

I would really appreciate it.

Regards.

over 2 years ago

+1 Clément over 2 years ago

TI__Guru* 94078 points

Hi,

The IQ data are stored in the same sequence they are recorded. In other words, the antenna used to sample a given IQ sample can be known by knowing the index of the sample.

The way to use the IQ data to calculate an angle depends on your use case, antenna design, estimation algorithms, etc.

Let me know if you have more questions,

Best regards,

0 Alejandro Garcia Aparcero over 2 years ago

Prodigy 40 points

Hi,

If someone could link me to previous developments or examples where AOA is calculated I would really appreciate it, to have a frame of reference. Or any additional, more in detail information. Thank you very much.

0 Stephen Endicott over 2 years ago in reply to Clément

Prodigy 20 points

Edit - I decided to create a new post instead as my question out grew the original scope of this post.

Bluetooth®︎

Bluetooth forum

LAUNCHXL-CC26X2R1: AoA angle calculation from IQ samples