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AWR1843: Does Radar detect moving objects easier than static objects?

Lei
Expert 2050 points
Part Number: AWR1843

Our Radar device uses AWR1843 and MRR lab demo. Both USRR and MRR mode are used when Radar device is working. In the test, it seem the Radar sensor detect the moving objects easier than static objects. 

For example, I test the plastic bollard barrier is placed at 60 degrees in front of the right, about 10 meters away. It is not be displayed in GUI viewver. When it start moving, then it can be detected some times. 

Does Radar detect moving objects easier than static objects?

Thanks

  • 0
    TI__Expert 8275 points

    Hi,

         Yes radar can ideally detect moving objects only and the static objects are not usually detected by the radar. Please refer to the training videos to get an idea of this: https://training.ti.com/intro-mmwave-sensing-fmcw-radars-module-1-range-estimation .

         Let us know if you have any questions.

    Thanks and Regards,

    Akshay.

  • 0
    Expert 2050 points

    Thanks Akshay, 

    Is this because Radar sensor filters the static objects? From the training videos, I could not see any reasons radar sensor cannot detect a static objects. I think Radar sensor should be able to detect the static projects, but just filter them out as the static objects are not be considered. 

    Kind regards

  • 0 in reply to Lei
    TI__Expert 8275 points

    Hi,

       For the radar to detect static objects, its not ideally possible as the detection involves the finding the x, y, z co-ordinates of the object which is only possible after the angle-FFT. For getting to the angle-FFT part, the doppler-FFT is used to estimate the velocity which depends on the phase change of the object and this is estimated based object motion, while if the object is static, velocity estimation is itself not possible which makes object detection not possible.

      Let me please know if you have any questions.

    Thanks and Regards,

    Akshay.