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CCS/IWR6843ISK: how to increase radar performance

kisub Jung
Intellectual 930 points
Part Number: IWR6843ISK

Tool/software: Code Composer Studio

It might be a newbie question on Radar. Please guide me for the following questions.

Q1. If we want to increase people tracking upto 5km, What should be considered?

In my guess, we need to narrow down Field of View and cascade radar and what about antenna size?

Q2. Can we increase SNR by putting more power? Should I insert more current only? What to be considered to increase SNR?

Q3. to narrow down elevation and azimuth, what can we do just Software setting? 

Q4. If weather or environment is fine, is lidar better than radar? Are there any advantage over lidar in good weather?

  • 0
    TI__Prodigy 560 points

    1. First, you should ensure that your chirp extends to the range at which you want to detect people. You can refer to the Chirp Configuration Tool to create a chirp that will work for your desired application.

    Then, you should change one of these three parameters: SNR threshold, points threshold, det2active threshold.

    You can refer to the People Counting Customization Guide for more information on altering these thresholds.

    2. If you are using the SDK demo or one of the labs from the Industrial Toolbox, the device is operating at maximum power by default.

    If you want to increase the SNR, you can average multiple chirps in a single frame.

    3. The elevation and azimuth FOVs are a function of the antenna itself, as the radiation pattern is defined by the physical characteristics of the antenna. This cannot be changed in software. You can refer to the Antenna Database or the user guide for your EVM to find the radiation pattern. 

    However, as of SDK 3.x, we do support the ability to filter out points in software by range, velocity or angle. This will not allow you to increase the maximum allowable angle, but it will allow you to effectively decrease the FOV by filtering out points outside your angles of interest.

    You can refer to the cfarFovCfg command in the SDK User Guide for more details.

    4. Lidar and radar have many common and complementary features. The decision to use one over the other is largely dependent on your application. One advantage of radar, besides weather conditions, is the ability to detect objects made of materials (such as glass) that lidar cannot detect.You might find these articles interesting.

    Automotive lidar: http://www.ti.com/lit/wp/slyy150/slyy150.pdf

    mmWave radar sensors in robotics applications (detecting glass): http://www.ti.com/lit/wp/slyy150/slyy150.pdf

    Industrial Toolbox Experiments: Detecting Walls of Different Materials, People Counting through Plastic and Drywall and Wood, Response of Radar to Rain.  

    Good luck,

    Allison