B.M.S COLLEGE OF ENGINEERING
(An Autonomous College under VTU, Belagavi)
Bull Temple Road, Bengaluru - 560 019
Technical Seminar-1 (20ECVESR01)
on
THE SOLI CHIP
MASTER OF TECHNOLOGY
In
VLSI DESIGN AND EMBEDDED SYSTEM
Adithya Reddy M V [ 1BM20LVS01 ]
DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING
2021-22
WHAT IS SOLI CHIP?
• A purpose-built chip to track motion on a microscopic scale
• A system for real-time motion tracking of the human hand
• It's able to track sub-millimeter motion at high speeds with great
accuracy
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WHO MAKES SOLI?
• Google's ATAP (Advanced Technology and Projects) division has been
developing the technology, which can be used in wearables, phones,
computers, cars and IoT devices
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WHAT CAN WE DO WITH SOLI?
• Browse through music tracks, play, pause and change the volume
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WHAT CAN WE DO WITH SOLI?
• Draw or paint using your fingers without touching the screen
• Navigate through maps
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WHAT CAN WE DO WITH SOLI?
• Rotate a dial
• Move a horizontal scroll bar
• Click a button ON/OFF
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WHAT CAN WE DO WITH SOLI?
• Vertical and horizontal scrolling just like on a touch screen.
• Other gestures
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LITERATURE SURVEY
1. SOLI : A Tiny Device for a New Human Machine Interface (IEEE –
2021)
2. Short-Range Radar based Real-Time Hand Gesture Recognition Using
LSTM Encoder (IEEE – 2019)
3. Soli: ubiquitous gesture sensing with millimeter wave radar (ACM –
2016)
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HOW DOES SOLI WORK?
• SOLI works on radar based gesture recognition system.
• The system has a micro radar transmitter and receiver which tracks the
motion of the hand.
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SOLI SENSOR BLOCK DIAGRAM
• FMCW type of RADAR
• 60 GHz
• 5 mm wavelength
• 0.05 – 5m range
• 160° field view
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FRACTIONAL-N PLL
Ref freq
N
o/p freq
19.68 MHz
122
2.40096 GHz
19.68 MHz
123
2.42064 GHz
19.68 MHz
122 + 51/492
2.403 GHz
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PUSH-PUSH VCO
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AN OVERVIEW OF GESTURE RECOGNITION SYSTEM
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ADVANTAGES
• Radar sensor – not affected by illumination – can sense even in occluded
condition
• Low power compared to optical cameras and does not need to be exposed
to outside because of radar signal’s transmissivity
• Captures very minute details of hand movement
• Small in size, hence fits inside very small devices – thanks to VLSI CMOS and
BiCMOS technologies which are ever shrinking
• Thereby can enhance the user experience in wearables, mobile devices,
TVs, smart homes, automotive infotainment systems
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CHALLENGES & FUTURE WORK
• In early stage of development
• Work is required to address radar clutter, signal coupling, fading,
interference
• Machine learning in gesture recognition
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REFERENCES
1. S. Trotta et al., "2.3 SOLI: A Tiny Device for a New Human Machine
Interface," 2021 IEEE International Solid- State Circuits Conference (ISSCC),
2021, pp. 42-44, doi: 10.1109/ISSCC42613.2021.9365835
2. J. -W. Choi, S. -J. Ryu and J. -H. Kim, "Short-Range Radar Based Real-Time
Hand Gesture Recognition Using LSTM Encoder," in IEEE Access, vol. 7, pp.
33610-33618, 2019, doi: 10.1109/ACCESS.2019.2903586.
3. https://www.pocket-lint.com/phones/news/google/134079-what-isgoogle-project-soli-and-will-it-forever-change-the-way-we-use-wearables
4. A Fully Integrated Dual-frequency Push-push VCO for 5.2 and 5.8 GHz
Wireless Applications
5. http://ispg.ucsd.edu/wordpress/wp-content/uploads/2017/05/2003Tutorials-I.-Galton-Delta-Sigma-Fractional-N-Phase-Locked-Loops
6. Soli: Ubiquitous Gesture Sensing with Millimeter Wave Radar - ACM Trans.
Graph., Vol. 35, No. 4, Article 142, Publication Date: July 2016
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THANK YOU!
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