AWR1443BOOST: mmWave Demo Visualizer : What causes the high magnitude reading at 0 meters in the Range Profile plot?

Hello,

I think you are seeing a DC offset in the receiver output.   

To test if the legs are an issue, remove the legs, place the EVM on a piece of insulating paper or cardboard with the antenna facing the ceiling.   

Ideally there is a reflection off the ceiling metal grid or pipes.   

For some testing, I have mounted a single set of legs (towards the back of the EVM) with a larger washer on the front and back of the EVM with nylon hardware.

The nylon screw can be shortened to just clear the nylon nut.

In the mmWave SDK User Guide, there is a specific API function that can be added.

Configure the Visualizer, save the configuration to a file.

Edit the configuration, to add the following API line

calibDcRangeSig 1 -5 5 64, this will remove the DC offset using the last 5 bins, and first 5 bins.    This value can be tuned for better performance.

Save the file.

Load the revised configuration, you should see a reduction in the DC amplitude.   In a different application concept, you could consider removing point cloud

objects within x centimeters from the front of the radar sensor also.

In the User Guide, this API is described on 24, it is shown in a configuration file on page 20.

Regards,

Joe Quintal