July 18, 2016
Wearable and Implantable Biomedical Devices
We have developed several new approaches for efficiently powering battery-free wearable and implantable devices, including the use of metamaterial lenses for near-field focusing. Additionally, we have applied backscatter communication to wearable and implantable devices to achieve extraordinary data throughput compared to conventional Medical Implant Communication Service (MICS) radios. We have developed example biomedical devices such…
Energy Efficient Modulated Backscatter Communication
We have developed several new approaches to modulated backscatter communication, including the first demonstration of quadrature amplitude modulated (QAM) backscatter at 96 megabits as well as the first demonstration of “Bluetooth Backscatter” devices that are compatible with absolutely unmodified Bluetooth devices. No hardware, firmware or software modifications are needed to receive these signals, yet their…
MIMO Wireless Power Transfer for Mobile Devices
We have developed novel strategies for exploiting multiple-input and multiple-output (MIMO) channels for wireless power transfer (WPT). Through the use of backscatter channel measurement, the channel state information for each mobile device can be rapidly acquired at minimal energy cost. We have demonstrated selective WPT enhancement of ~10X and selective WPT denial of greater than…
Millimeter-Wave Compressive Imaging with Metamaterial Antennas
We have developed novel compressive imaging approaches in the millimeter wave bands (18-26 GHz, 85-110 GHz) using metamaterial antennas. The metamaterial antennas are designed to exploit extreme frequency diversity in their radiated modes to enable rapid single-shot image reconstruction from sparse measurements. Applications include spaceborne imaging radars as well as indoor personal security.
Learning Decision-Making Models Using Non-traditional Equilibrium Concepts
Game theoretic models often assume complete rationality. However, in practice decisions are often made myopically (bounded rationality). We are developing new equilibrium models of decision-making in a modified game theoretic context using decision-making processes with reduced notions of rationality. With these equilibrium concepts, our research builds on our existing work in the area of utility…
Dynamical Systems and Games
Game theory is a power framework for gaining qualitative insight into the outcome of strategic agents; however, it is difficult to compute equilibria. Using tools from differential geometry, we are developing new methods for characterizing and computing Nash equilibria. By drawing on classical work in dynamical systems theory, we are developing novel equilibrium concepts that…
Privacy and The Value of Information
Tightly coupled with the operation of large-scale urban infrastructure is a diverse set of socioeconomic factors. A significant amount of data is being collected from these systems. This data, on the one hand, is utilized in improving system performance; on the other hand, it potentially exposes sensitive information. We are quantifying the value of the…
Next-Gen Urban Ecosystem & The Emerging Data Market
The next generation urban ecosystem, empowered by internet of things (IoT), has at its core a shared economy where resources are easily aggregated and exchanged. In consequence, a new market place is emerging in which both physical and information-based resources are valuable commodities. Our research is developing learning and optimization schemes that address inefficiencies arising…
Intelligent Compact Optical Sensors (iCOS)
The Internet of Things requires a large number of sensors, which need to be compact and low power while remaining intelligent enough for data processing. Our research is addressing this problem by using nanophotonics, specifically integrated photonics, to achieve an incredibly compact sensor. The challenge with extremely small sensors is achieving high performance. Our research…
Micro-instrumentation by Optical MEMS
We have developed a scanning micro-mirror with an adjustable focal length for endoscope applications. With active focus tracking capability, it allows high-resolution 3D imaging to be achieved with the endoscope system, which can significantly improve the currently limited ability for detecting early and pre-cancers.
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