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In the video and paper, they don't actually explain what backscatter is in this context. The wifi signal is what's being "backscattered". Here's some of the l
by kristianp 9y ago
In the video and paper, they don't actually explain what backscatter is in this context. The wifi signal is what's being "backscattered". Here's some of the leadup papers about it:
https://passivewifi.cs.washington.edu/files/passive_wifi.pdf https://passivewifi.cs.washington.edu/files/passive_wifi.pdf
https://homes.cs.washington.edu/~gshyam/Papers/wifibackscatter.pdf https://homes.cs.washington.edu/~gshyam/Papers/wifibackscatt...
- lopmotr 9y agoHere's a video explaining WiFi backscatter. It really is an amazing concept even without doing HD video with it. All kinds of devices - I'm imaging home automation sensors - could become batteryless. http://iotwifi.cs.washington.edu/ http://iotwifi.cs.washington.edu/
- ww520 9y agoThat is an amazing concept, simple and effective, just reflecting backscattered wifi signal on and off to encode data.
- nightcracker 9y ago> All kinds of devices - I'm imaging home automation sensors - could become batteryless. That's terrifying.
- therein 9y agoYou can still use jammers to prevent backscatter from being readable but your jamming signal will just power the sensor more. :)
- gjem97 9y agoThanks, that second paper is helpful. The OP is really the proof that passive Wifi is actually useful. In my opinion, the real advance here is in that second paper you cite, the fact that they've built Wifi enabled devices that are powered by the Wifi signal itself.