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IWR6843ISK: CompRangeBiasAndRxChanPhase setting for LAB Long range peaople detection

user244678
Expert 1365 points
Part Number: IWR6843ISK

Hi,

Why is the compRangeBiasAndRxChanPhase setting different only for chirp config "people_detection_and_tracking_100m_2D_advanced.cfg" in 68xx Long Range People Det of Industrial Toolbox 4.11.0?

people_detection_and_tracking_100m_2D_advanced.cfg :
compRangeBiasAndRxChanPhase 0.0 0.71313 -0.07993 0.80444 0.32242 0.65005 0.43036 0.63889 0.31528 0.56631 -0.49283 0.87103 -0.20547 0.80157 -0.02173 0.72357 -0.10864 0.39642 -0.74313 0.82355 -0.56723 0.82816 -0.34360 0.71524 -0.39929

people_detection_and_tracking_50m_2D.cfg and people_detection_and_tracking_50m_3D.cfg :
compRangeBiasAndRxChanPhase 0.0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0

Best regards,
Hiroyuki Taguchi

  • 0
    TI__Mastermind 37805 points

    Hello,

    The User's Guide in the mmwave SDK (likely found at C:\ti\mmwave_sdk_03_05_00_04\docs links to the doxygen page that describes how these values are computed.

    C:\ti\mmwave_sdk_03_05_00_04\packages\ti\datapath\dpc\objectdetection\objdetdsp\docs\doxygen\html

    You will likely want to calculate your own if possible. If that's not possible, I would recommend sticking with the cfg in the lab that corresponds most closely with your setup.

    Best,

    Nate

  • 0 in reply to Nathan Block
    Expert 1365 points

    Hello,

    Thank you for your reply.
    I was convinced about the correction calculation method.

    What I want to know is why some of the same Lab cfgs have corrections and some do not.

    compRangeBiasAndRxChanPhase with correction value ... people_detection_and_tracking_100m_2D_advanced.cfg
    compRangeBiasAndRxChanPhase No correction value (default) ... people_detection_and_tracking_50m_2D.cfg

    In people_detection_and_tracking_100m_2D_advanced.cfg, is it related to beam steering?

    Thanks,
    Hiroyuki

  • +1 in reply to user244678
    TI__Mastermind 37805 points

    Hi Hiroyuki,

    It is not related to beam steering. After further investigation, I have found that this profile was created for the individual IC used for our development of the lab. It is likely more relevant to run this procedure in the 100m case because it improves angle performance, which can compound over longer distances. When you run this lab yourself, you should tune your own device and generate your own compRangeBiasAndRxChanPhase for best performance.

    Best,

    Nate