Google’s Project Soli: the tech behind Pixel 4’s Motion Sense radar
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By now, you’ve heard: the new Google Pixel 4 has a tiny radar chip inside it, which allows you to swipe or wave your hand to do a few things. More importantly, Motion Sense (as Google has branded it) is designed to detect your presence. It knows if you’re there.
from https://www.theverge.com/2019/10/15/20908083/google-pixel-4-project-soli-radar-motion-sense-explainer
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