CCS/IWR6843ISK: CFAR Range vs CFAR Azimuth ( People Counintg)

Hi,

CFAR is a comparative algorithm that looks at energy in a current Range/Azimuth bin and compares it to the average energy of the bins around it. This is first done in the range direction, then done in the Angle direction. A bin has to pass both checks to become a point. The larger a CFAR threshold is, the stronger a reflection has to be to count as a point.

We think the default values are best - otherwise we would have different defaults. 

Regards,

Justin

Dear TI 

                  Default values is best for EVB only , we are try more type of our design but every type are different .

                 Product design for end user need follow customer spec . only less information is hard to reach customer spec. and requirements

                 If have tuning guide for product design will shorten time to market period.

BR 

Hi Agate,

In that case - there isn't a single best value, but for people counting, you need to understand the following on CFAR:

1. In the ideal case, you will see a point cloud roughly the size of the person when they are moving through the area - otherwise you won't get detected points, or you will get a few detected points when the person is sitting/laying/standing still.

2. You want to remove noise from other sources in the point cloud.

Essentially, you want to tune CFAR so that by looking at the point cloud, you can tell where a person is when they are walking around. Before you dive too deep into this, we need to resolve the other thread you have open on the point cloud FOV.

Regards,

Justin