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IWR6843ISK-ODS：Antennas used for angle estimation

haibo li
Prodigy 10 points
Part Number: IWR6843ISK-ODS

I checked the documentation corresponding to aoaproc. Which uses azimuth and elevation FFTs in both directions to calculate the elevation and azimuth. It is shown below:

angle FFT

The source code process for aoaproc is the same as the image.

The documentation seems to use the 6843ISK radar as an example. So the 6843 ODS angle estimate antenna was chosen the same way? If not, is there a corresponding source code to refer to?

If the idea above is modeled, does the ODS perspective estimate look like the following：

6843 ODS

The following formulas are similar to those in the aoaproc documentation:

To summarize, I'd like to know how the radar angle estimation is done, and if I can find the corresponding code?

  • 0
    TI__Mastermind 19450 points

    Hello.

    The angle estimation is done by taking an FFT across multiple sections of the antenna dimension in the radar cube, and the corresponding code can be found in the aoa2dproc folder in the SDK.  I have provided the path to the documentation in the SDK as well as the source code below.

    Documentation: <SDK-INSTALL-LOCATION>\packages\ti\datapath\dpc\dpu\aoa2dproc\docs\doxygen\html

    Source: <SDK-INSTALL-LOCATION>\packages\ti\datapath\dpc\dpu\aoa2dproc

    Sincerely,

    Santosh

  • 0 in reply to Santosh Krishnan
    Prodigy 10 points

    Thanks for the reply

    I've actually looked at the source code for aoaproc. The code seems to correspond to the documentation. But the documentation is for 6843ISK and ODS has a different antenna arrangement. I would like to confirm that ODS also executes the same code? If so why does the horizontal FFT take 8 antennas

  • 0 in reply to haibo li
    TI__Mastermind 19450 points

    Hello.

    They do have different antenna arrangements, so to take this into account, the out of box demo for the ODS uses a different/custom antenna_geometry.c file and a different main.c file to account for these difference.  However, the estimation process of taking an FFT across the antenna dimension stays the same, hence the aoaproc code is the same.

    Sincerely,

    Santosh