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IWR6843ISK: People Counting Lab VS Long Range People Counting Lab

Robert Hutchinson63
Prodigy 80 points
Part Number: IWR6843ISK
Other Parts Discussed in Thread: IWR6843

Hello,

My company is using the IWR6843 chip.  We are working with CCS and mmwave_industrial_toolbox_3_6_0. 

We are looking at lab0015_pplcount_68xx and lab0019_pplcount_long_range_68xx.   We would like to understand these in detail.  I understand that Lab 19 is intended to give approximately the same performance as Lab 15 BUT with longer range, (up to 50m). I have been studying the source code for these labs.    I see that the source code is very similar but not identical for these 2 labs.  

Could you give an overview of what is different in the source code between the 2 labs.  Please explain what is changed in Lab 19 to give the longer range.  It seems that more is changed than just configuration parameters.  Can you reference specific files in each project and describe the main differences and how these differences give Lab 19 longer range?  

Seeing the code differences which produce longer range will greatly help my understanding of how these labs function.

Thanks much,

Rob

  • 0
    TI__Mastermind 28055 points

    Hi Rob,

    The signal chains are different between the two labs.

    1. People Counting uses Range-Azimuth detection - using a technique called Capon BF, the demo generates a 2D heatmap for range-azimuth of the scene in front of the sensor.  It then generates a point cloud based on this heatmap.
    2. Long Range uses a Range-Doppler detection scheme.  It creates a range-doppler heatmap, detects points from this, then calculates the angle for each detected point.
    3. Both labs use the same tracker, with different configuration settings.

    The lab0015 signal chain produces a more accurate point cloud, but breaks down at long range. Please see the People Counting TID for information on the Lab0015 chain, and the Traffic Monitoring TID for information on the lab0019 signal chain.

    Regards,

    Justin