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CCS/IWR6843ISK: how to distinguish ground clutter and static object ？

user4542591
Prodigy 240 points
Part Number: IWR6843ISK
Other Parts Discussed in Thread: IWR6843, AWR1642BOOST

Tool/software: Code Composer Studio

Hi，

  nowadays， we use IWR6843 as a sensor to detect static object ，the signal process flow： ADC data -> range fft -> doppler fft , cfar along doppler dimension， then cfar along range dimension，get object's range index and doppler index，a dbf algorithm to get object’s azimuth angle，the object were detected from zero doppler，ground clutter is also detected，we find that static object’s position is fixed， but groud clutter's position random change in a region，a large cfar threshold, some object can't be detected,  a small cfar threshold, many ground clutter points are deteced，we have done a lot of work to eliminate clutter，but the effect is not good.

How to make a distinction between ground clutter and static object ？？？

  • Former Member
    0 Former Member

    Hello,

    I would suggest that you try the Area Scanner Demo for the IWR6843 ISK ES2.0 This demo uses background subtraction to detect newly added static objects in the scene. In this way the ground clutter and the static object that are added to the scene after the initial calibration are distinguished from each other.

    Amanda

  • 0 in reply to Former Member
    Prodigy 35 points

    Hello，AmandaN

    I‘m using AWR1642BOOST and DCA1000, and I'm facing the same question, can you give me some suggestion?

    Also, my radar will detect target at zero distance(there is definatily nothing),  how can I deal with it?

    Do we have any white paper describe how TI radar combat clutters?

    Guo

  • Former Member
    0 Former Member in reply to user5355847

    If you are using the DCA1000, you will need to implement static clutter removal or correction in your own post processing software. I would recommend you examine the source code for the out of box demo in the mmWave SDK to see how static clutter removal and DC calibration are enabled. I would also recommend you consult the mmWave SDK doxygen for more details on both features to implement it in your code.

    Amanda