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IWR6843: How to adjust the parameters on the TI Demo Visualizer to obtain maximum number of points.

user5903056
Intellectual 910 points
Part Number: IWR6843

I want to use TI Demo Visualizer to visualize the 3D point output from IWR6843. But I got a very sparse point cloud. I want to know how to adjust the parameters to show a denser point cloud. It would be better to depict the general shape of the detected object. 

I would be appreciate if someone can help me. Thank you in advance!

  • 0
    Intellectual 910 points
    As for the "Setup Details", Platform is xWR68xx. SDK version is 3.0. Antenna Config is 4Rx, 3Tx(15deg+Elevation).
  • 0 in reply to user5903056
    TI__Mastermind 30405 points

    Hello,

    You can increase or decrease the number of detected points using the the Real time tuning tab on the mmWaveDemoVisualizer as shown below:

    1. Peak Grouping for both Range and Doppler is enabled by default. With the peak-grouping scheme enabled, instead of reporting a cluster of detected neighboring points, only one point, the highest one, is reported. This reduces the total number of detected points per frame. You can disable peak grouping and see the number of points increase on the scatter plots.

    2. CFAR threashold (Range / Doppler): These are the thresholds used in the demo processing chain to consider a peak as a valid detected point. Increasing the threshold reduced the number of detected points and decreasing the thresholds increases the number of detected points.

    3. Field of View: You can set the Field of View parameters: min and max range, min and max angles in azimuth and elevation to define your zone of interest per the application requirements. This will avoid allocating detected points beyond the desired FOV and thus increase the number of detected points in the specified region.

    Please refer to the mmWaveDemoVisualizer user guide for more details.

    Regards

    -Nitin  

  • 0 in reply to Nitin Sakhuja
    Intellectual 910 points

    Hi Nitin,

    Thank you for your answer! It is very helpful!

    I also want to ask that how about the parameters under the "Confugure" tab, especially the parameters like "Frame Rate", "Range Resolution" and so on? Do these parameters make a big difference to the number of detected points while people walking in front of the board?

    Thank you in advance!

    Regards

    Jie

  • 0 in reply to user5903056
    TI__Mastermind 30405 points

    Hi Jie,

    Yes, the sensor configuration for a particular application/scene are determined based on the application requirements such as Max range, Range Resolution, Max Velocity, frame rate etc. Please look at the following threads and resources mentioned in them to familiarize yourself with the various aspects related to configuring the sensor for a particular application.

    IWR1443: Generic development flow to define/implement the RF and DFE configuration for the specific application

    IWR1443: profile parameter guidelines

    Regards

    -Nitin