What’s in news?
A radar-based Soli chip was used in the recently launched google pixel 4.
- Google Pixel 4 uses a radar-based Soli chip to introduce Motion Sense, a feature that provides similar touchless gesture-based controls.
- Project Soli was introduced in 2015 which was driven by Google’s Advanced Technology and Projects (ATAP).
- A radar chip can be used to detect hand movements and gestures to interpret what they could mean.
- Google figured out how to reduce the size of this radar chip fitted in front of the smartphone, still ensuring accuracy.
- Google’s Soli is a purpose-built chip to track your motion on a microscopic scale.
- It uses miniature radar (8mm x 10mm) for real-time motion tracking of the human hand; it’s able to track sub-millimetre motion at high speeds with great accuracy.
- The size reduced radar can understand human motions at various scales, from the tap of a finger to the movements of the body.
- The chip is used to collect the raw data of hand gestures and then interpret them correctly for the right commands.
- The Soli is not a camera and it cannot be used to capture any visual images.
- The soli rely on custom-built machine learning (ML) model.
- This model is used to understand a large range of possible movements.
- The data from the sensor will not sent to any server.
How it operates?
- The radar chip emits electromagnetic waves in a broad beam.
- When a human hand interacts with this, some of these waves are reflected back to the antenna.
- The ML-model quickly interprets the properties of the reflected signal to carry out the required command.
- This help the users of Google Pixel 4 to snooze the alarm or skip songs or go back to the last song without touching the screen.
- It is optionable. The user can turn Motion Sense on or off through settings.
Why India opposing this radar?
- The Soli radar chip works on the 60 GHz spectrum frequency, which is not commercially usable in India.
- The 60 GHz band is also known as V-band or WiGig band.
Links to note: