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Bringing Gesture Recognition
To All Devices
學生：黃建輔
指導老師：許毅然
 Introduction
 AllSee’s
Receiver Design
 AllSee’s
Classification Logic
 Analog
Gesture Decoding
 References
1/2
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existing approaches need power-hungry
sensing
they require rich signal processing capabilities
2/2
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extract gesture
information
from ambient
RF signals
2/3
Leverages
existing signal
for power and
gesture
recognition
 Consumes lower
power and can
enable always-on
gesture
recognition for
smartphones and
tablets

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Use an envelope detector to extract the
amplitude information
Use passive analog components and
hence is ultra-low power in nature
1/2
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AllSee can detect and
classify these eight
gestures
Changes created on
the envelope
detector’s output
2/2
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An envelope detector to remove the carrier frequency
A second envelope detector that tracks changes
caused by the gestures at a slow rate
The buffer ensures that the envelope detector and
the averaging circuit do not affect each other
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AllSee
http://allsee.cs.washington.edu/
Bringing Gesture Recognition To All Devices
http://allsee.cs.washington.edu/files/allsee.pdf