Using Backscatter for Cellular Signals

We use cellular for some interesting application, like obviously we were able to harvest. But then we also tried reflecting cellular signals. We also did a very interesting project where basically you can use hand motions to change how signals are reflected from the body and use that as a way to gesture with the phone. Yes, yes, cellular networks are very sophisticated. They have to be because that's how we all can have like thousands of cell phones in one cell. And they do very precise power control very precise timing and that is unpredictable if you're not part of the network. That was a challenge and that's why we moved away from cellular to more popular standards like Wi-Fi and Bluetooth where they