Google’s Project Soli radar is sensitive enough to count sheets of paper

Re:Google’s Project Soli radar is sensitive enough to count ... by dcroley on Tuesday January 08, 2019 @02:08PM (#18858484)

If a sheet of paper is roughly .1 mm, then this must be running over 300GHz, or what is more commonly called infrared light, no?

[ Parent | on HN ]

Re:Google’s Project Soli radar is sensitive enough to count ... by mediocrejoker on Tuesday January 08, 2019 @02:34PM (#18858784)

I think it runs around 60Ghz and uses phased arrays / doppler to make up the rest of the resolution.

[ Parent | on HN ]

Re:Google’s Project Soli radar is sensitive enough to count ... by DoctorOetker on Wednesday January 09, 2019 @03:41AM (#18863271)

good catch, probably it's not actually resolving the individual card layers, but using the Lambert-Beer law of attenuation, after callibrating on a deck of known number of cards?

[ Parent | on HN ]