AWR1843BOOST: Could you give some explanation on range FFT?

The other points in the range FFT corresponds to clutter or noise.

Thank you

Cesar

What is object/non-object is just an interpretation by us the users of how we want to use the processed data to interpret the physical world to our interests. What one application may call clutter, the other may call object.  But from the radar point of view, anything and everything that gives a back scatter is going to show up in the FFT bin corresponding to the range at which they are there. Each FFT bin energy indicates all reflections present at that range, and this includes all that are moving at any speed but happen to be at that range when the scene is sampled as well as all reflections at all angles in three dimensions at that range. You can imagine in the physical world a concentric sphere of thickness equal to the physical distance represented by one range bin at the distance represented by the range bin and take its intersection with the antenna FOV and basically all that reflects in that volume and moving at any instantaneous speed in that volume is going to get aggregated and then add the receiver noise to this [dominated by thermal noise in the receiver electronics, so it is constant level independent of reflections] and the total is what you see in the FFT bin.