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IWR6843ISK-ODS: Configuration parameters

Ali İhsan Çubukçu
Prodigy 20 points
Part Number: IWR6843ISK-ODS

We are conducting the overhead occupancy lab using IWR6843ISK-ODS and realized that change in some configuration parameters such as sensorPoistion (tilt angle value) and antPhaseRot does not make any change.

In addition, the interface in Matlab Runtime does not contain some buttons; such as "Pause Display", are not contained which are available in the  User Guide. 

What is the reason behind those problems? 

Thank in advance!

Best regards,

  • 0
    TI__Genius 14415 points

    Hello,

    The azimuth tilt angle is not supported in this demo right now, but the elevation tilt should make a difference. It might not look different, but should change where tracks are plotted on the display. The antPhaseRot is a property of the antenna on the EVM and should not be modified.

    The overhead_demo_visualizer is for real time visualization so does not have a pause function. The fhist_player has the pause button as it is for replaying recorded scenes. Please see the readme file in the GUI folder for instructions on recording and replaying.

    Regards,

    Jackson

  • 0 in reply to Jackson Thomas
    Prodigy 20 points

    Dear Jackson,

    Thank's for your reply.

    What I am trying to change is elevation tilt and it makes no difference. In order to understand this I made a huge difference like 45 degree and I see the same result and I don't understand why.

    When I go over calibration procedure that is given by TI, I saw that the real and imaginary parts of phase rotated antennas are already multiplied with "-1" and this is why I tried "1 1 1.." in antPhaseRot parameter. If something went wrong, I would have seen an irrelevent result on screen but again I didn't. Maybe the reason behind both of the problem can be same.  

    Actually when I mounted EVM parallel to floor, the results makes sense. But I am not sure if my calibration parameters is used and if I can have better results because of this reason.

  • 0 in reply to Ali İhsan Çubukçu
    TI__Genius 14415 points

    Hello,

    For more information on the phase rotation parameter, please see the following document. This parameter should match the antenna design.

    3D_people_counting_detection_layer_tuning_guide.pdf

    The matlab GUI for the overhead people counting demo actually does not adjust the display based on the tilt angle. This will be used internally by the sensor to orient the boundary boxes. You can modify this parameter in the matlab source code to add a tilt in the display. The .exe file is only setup for operation parallel to the floor.

    Regards,

    Jackson