Google's Soli mini-radar gesture controls for phones, cars just got more accurate

Google's Soli sensors get approval to operate at higher power levels than currently allowed by US regulators.
Written by Liam Tung, Contributing Writer on

Google has gained a waiver from the Federal Communications Commission (FCC) to operate its radar-based Soli sensors at higher power levels than currently allowed and to use them on airplanes.  

Google's Soli 'field-disturbance sensors' promise a new way of interacting with devices by using fine finger gestures, allowing users to control virtual buttons, dials and sliders on their hands. 

Google unveiled the technology at its 2015 IO conference. Soli was developed by Google's Advanced Technology and Projects (ATAP). 

Google says while the controls are virtual, the sensors can generate feedback by the haptic sensation of fingers touching each other. The chip can be embedded in wearables, phones, computers, cars, and IoT devices.

The FCC offered Google the waiver after finding the Soli sensors "pose minimal potential of causing harmful interference to other spectrum users and uses of the 57-64GHz frequency band". It also ruled that Soli will "serve the public interest by providing for innovative device control features using touchless hand-gesture technology".

Google sought the waiver to operate its Soli radar at 57-64GHz at power levels that are in line with a European Telecommunications Standards Institute (ETSI) standard, which is higher than the FCC's current rules. 

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Google argued that the FCC power limits are "too restrictive" for Soli, "resulting in user dissatisfaction due to missed motions and fewer effective interactions". 

The FCC noted that ETSI has not seen adverse effects from short-range devices in this band at Google's requested power levels since first allowing it in 2014. 

Facebook and some others raised concerns that Soli sensors could interfere with sensors in the Earth Exploration Satellite Service and 60GHz Wi-Fi.

As Reuters notes, Google and Facebook jointly told the FCC in September the Soli sensors could operate beyond currently permitted power levels, though at lower levels than Google originally proposed.

The FCC dismissed concerns that Soli chips could interfere with satellite sensors through windows when being used on an aircraft, noting that it is likely human bodies located near a Soli sensor would block the signals.  


Google's Soli 'field-disturbance sensors' promise a new way of interacting with devices by using fine finger gestures.

Image: Google

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