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IWR6843AOP: AoA precision

Part Number: IWR6843AOP

Tool/software:

Hi,

I have a related question about the precision of angle estimation. While I understand that there are inherent limitations due to the antenna design (e.g., spacing), I’m curious whether any additional processing is applied within the FFT cell where the detection occurs.

In other words, assuming a single target is present in the scene and its detection falls into a specific angle FFT cell, how is the angle of arrival estimated? Is it determined using a basic goniometric formula, interpolation, MUSIC, or another method? Additionally, are there any firmware options available that allow for different approaches to this estimation?

Thank you.

Best regards,
Adam

  • Hi Adam, 

    Most of our examples (including the Out-of-Box demo) implement a conventional beamforming (Bartlett) implementation for AoA (Implementation details in the SDK doxygen {mmwave_sdk3_install}/packages/ti/datapath/dpc/dpu/aoaproc/docs/doxygen/html/index.html).  However, we do also have the 3D People Tracking demo which implements a Capon/MVDR beamformer for angle estimation (implementation details in section 6.1 of this guide).

    Best Regards,

    Josh