IWR1642BOOST: the detection of ghost

HI, Wenhao:

It could be due to multi-path reflection and there is no one easy way to filter out all the multi-path reflections.

If you know all the interested action will be in the close range, then you can ignore all the detection that is beyond certain range;
If you know there is a wall on some angle, then you can consider filtering out the detection that is located behind the wall;
If you only interested in the detection above the floor, then you can consider filtering out the detection that is below the ground;
and etc.

Sometimes, the multi-path reflection is weaker and phase changes a lot over chirps, you can use it as well;
In addition, you can use the upper layer module like a cluster or tracker to help. Usually the multi-path reflections are less stable and jumping around in location;

As a summary, there is no one easy way to deal with all the multi-path reflection. You have to be creative to fight them.

Hope it helps,
Zigang