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Original question:

IWR1642BOOST: Profile Configuration for long range detection (CFAR and DOA)

IWR6843: IWR6843 vs IWR1642 for long range people detection

Scott Tattersall
Intellectual 290 points
Part Number: IWR6843
Other Parts Discussed in Thread: IWR1642, IWR1642BOOST,

Hello again,

Just while you're looking into the bug fix for the Traffic Monitoring lab, I noticed this "Long-range" antenna module IWR6843: http://www.ti.com/tool/IWR6843ISK

Would this be more likely than our existing IWR1642 to pick up adult human movement at 50-100m? I don't see any option in the chirp estimator tool for this board, what would be the best configuration for usage in long range people counting applications for this board?

Thanks,

Scott

  • 0
    TI__Mastermind 21295 points
    Hello Scott,

    IWR6843 is our new 60GHz mmWave sensor. Please see the following website for more information on People Counting/Building Automation using IWR6843. It has links to several new labs and a 60GHz whitepaper.
    www.ti.com/.../building-automation.html

    Please note the following corrected link for the new 50m Outdoor People Tracking and False Detection Filtering - 68xx lab on the TI Resource Explorer.
    dev.ti.com/.../

    The mmWave Sensing Estimator is currently being updated to support IWR6843.

    Regards,
    John
  • 0 in reply to JohnH
    Intellectual 290 points

    Thanks John for the links, but to get to the core of my question:

    Is this new board more likely to provide reliable results of human detection at 50m that the IWR1642 (which I already have, and does not currently produce reliable results at that range)?

    Thanks,

    Scott

  • 0
    TI__Mastermind 28055 points

    Hi Scott,

    The IWR6843ISK is our standard antenna for 60GHz. Performance will be about equal to that of the IWR1642BOOST.  We have ported the Traffic Monitoring lab to 60GHz, but now call it "50m Outdoor People Tracking and False Detection Filtering - 68xx".  This has identical performance to the demo you are evaluating on IWR1642.  We have supplied a chirp configuration with the lab.

    Regards,

    Justin

  • 0 in reply to Justin Curewitz
    Intellectual 290 points
    Hi Justin, thanks for the clarification. Unfortunately as you know I have not been able to replicate the results from the 50m people tracking experiment using the IWR1642BOOST, despite using the same configuration file and setup. The best I have achieved with a modified config (for more sensitive state transition parameters) is up to 40m with people walking away from the device but only 15-20m with people walking toward the device. As reliable long range detection is vital for our use case I was just exploring if this other device might give better results. I will nonetheless test out the bpm and single tx antenna config options on 1642 when the bugfix is complete and perhaps that might increase the performance of the device.
    Thanks,
    Scott
  • 0 in reply to Scott Tattersall
    TI__Mastermind 28055 points
    Hi Scott,

    I am not sure if I have discussed proper EVM mounting with you before - in earlier documentation TI had suggested a 10 degree downtilt for People Counting/detection. However, at long range this causes significant degradation in performance, as the center of the beam is pointed at the ground about 12 meters in front of the device. Our quoted results have the device tilted 2-3 degrees down, which will put the center of the beam on the ground at about 45-50 m, improving the number and strength of detected points on approaching people. We only expect 40-50 meter detection with 20 degrees of boresight.

    Regards,
    Justin
  • 0 in reply to Justin Curewitz
    Intellectual 290 points

    Hi Justin,

    Thanks for that clarification, I will try this experiment again later this week and pay close attention to the downtilt (I will try different tilts and see if any improve the detection).

    Thanks,

    Scott

  • 0 in reply to Scott Tattersall
    TI__Mastermind 28055 points
    Hi Scott,

    If possible, please save videos/screenshot of the output and the fHist data from the GUI. This feedback can help me determine what the issue you are experiencing is.

    Thank you,
    Justin