Looks like a great proof of concept, but I wonder whether the off-the-shelf WiFi devices will need to support some sort of protocol to enable this to work? I didn't see anything in the video about how they specifically integrate with WiFi, but I'm assuming there will need to be some sort of broadcast and then response read. Either way, very interesting project from both a software and electronics point of view.
This particular work, requires forcing transmission of CTS-to- self to avoid transmission by nearby stations. The effect of the tag on the signal strength/ CSI can be measured at software level. Both enforcing the CT-to-Self and measuring the impact on CSI should be doable in software level and on the off the shelf APs. The downside of this method is low range, and low data rates, at Wavelite, we are leveraging the same backscattering concept, where we use off the shelf routers with no software modification, and using a separate device (a cellphone or laptop or router)as the receiver. Here is a link to a demo video: https://drive.google.com/file/d/1wprRR7LhPNwy07JjDlB0Hv804D7...
