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AWR1843BOOST: Range and Resolution

ArTzy
Genius 17365 points
Part Number: AWR1843BOOST

Hi Experts,

Good day. Seeking your advise on this query I posted on behalf of my Cx:

I am facing the following problem while trying to measure the coordinates of my target (trihedral corner reflector) using AWR1843BOOST. I am using the mmwave Demo visualizer.

1. I tried calibrating using the compRangeBiasAndRxChanPhase
As mentioned in the file- C:\ti\mmwave_sdk_03_06_00_00-LTS\packages\ti\demo\xwr18xx\mmw\docs\doxygen\html\index.HTML for the

While this seems to improve the error in the Z-axis, I am getting incorrect values in the Y-axis direction.

2. Also, when I increase the distance of the target beyond the range resolution, I start getting incorrect coordinates for all three (x,y,z).

3. Suppose my range resolution is 0.341 m for bandwidth 77GHz, as soon as I keep my target at 0.35 m (or any a few cms far from 0.341 m) the range shown in the plot becomes 0.682 (twice it)

Can you suggest what might be the issue? I am using only the AWR1843BOOST board along with the mmw_demo_example_script file.

What other things i should do to increase the accuracy of the x,y, and z coordinates for my data? Either in physical placement or configuration etc.

PN: AWR1843BOOST

Thank you.

Regards,
Archie A.

  • +1
    TI__Guru*** 147894 points

    In order to increase the range accuracy you would need to increase the number of ADC samples.

    Please use google site search to find similar threads:

    site e2e.ti.com awr accuracy

    Thank you
    Cesar

  • 0 in reply to Cesar
    TI__Genius 17365 points

    Thanks Cesar,

    Customer already has increased the number of ADC samples, also went through the different threads.

    He tried using a smaller trihedral corner reflector and using the file profile calibration.cfg as their calibration profile. While the coordinates improved, seems they're having issues in Z-axis *even after calibration*, when change the value along the Y-axis and X-axis then, they're  getting an error in the Z-axis, it gives a point which is outside the target. (which doesn't make sense)

    Please suggest me how can this error be resolved. Also, we would want to know where is the point in the board from where the elevation angle is found.

    Thank you.

    Regards,
    Archie A.

  • 0 in reply to ArTzy
    TI__Guru*** 147894 points

    The elevation angle would be computed from the center of the antennae.

    In order to perform calibration, the corner reflector would have to be placed at a larger distance: 2,3m

    At closer proximity there are increasing distortion

    thank you

    Cesar