A long held assumption in wireless is that radios cannot transmit and receive at the same time on the same frequency. This assumption has informed several aspects of wireless network design: from radio design to PHY, MAC and network layers. In this talk, I will describe my research on invalidating this fundamental assumption. Specifically, I will describe the evolution of my research on self-interference cancellation over the last six years. The prototype has now been commercialized by Kumu Networks and has undergone successful field trials with Tier 1 network providers worldwide.
My work on self-interference cancellation has enabled a whole host of new applications beyond full-duplex radios. I will describe briefly, how we built a variety of systems: a full duplex relay which extends both range and capacity, a Wireless Virtual reality headset, low power connectivity solutions for IoT and fine-grained human motion tracking. I will also highlight the cross-disciplinary nature of the research spanning algorithms, software-hardware design, RF circuits, signal processing, PHY and MAC layers, and discuss both the challenges and opportunities in attacking problems that span several disciplines.