Research

Electronic Circuits and Systems

bandwidth efficient coding and modulation
design of efficient coding and modulation schemes for reliable transmission over band-limited channels

radio architecture and codes for deep space and satellite communications

multimedia communication
combined source and channel coding and restoration techniques for robust transmission of video/audio

statistical signal processing
array signal processing (radar, sonar) and applications to wireless communications

identification and estimation
blind identification, set membership estimation, nadaptive equalization, and spectral analysis

digital filtering
analysis and design of multidimensional filters, floating point realizations, robust stability of discrete-time systems, nonlinear discrete-time systems

digital image processing
data compression for image sequences, video data processing, tomographic image reconstruction, and image restoration/enhancement

control systems
investigations of stability, robust control, restructurable control, zero dynamics, modeling, and nonlinear servomechanism design

autonomous control systems
theoretical developments for realization of control systems with enhanced operational capabilities

hybrid control and large-scale dynamic systems
qualitative properties of large-scale dynamical systems addressing Lyapunov stability, input-output properties, and decomposition problems.

Electronic Materials and Devices (EMD)

quantum device phenomena
optical properties, localization, universal conductance fluctuations, transport, interference and resonant tunneling

nanoelectronic systems
novel circuits-and-systems architectures for the nanoelectronic regime

molecular beam epitaxy (MBE)
Epitaxial growth of III-V nitride heterostructures, graded polar heterostructures, quantum wells and dots, electronic transport and optical properties, and their device applications

experimental nanoelectronics
nanofabrication of quantum dots, cryogenic characterization of single-electron effects, and ultra-small resonant tunneling diodes for ultra-high-speed digital ICs

nanospectroscopy
high spatial, spectral and temporal resolution investigations of quantum dots via atomic force microscopy and near-field scanning optical microscopy

device degradation
studies of the electromigration behavior of ultrasmall metal interconnects and hot carrier effects in MOS oxide breakdown phenomena

optoelectronic materials
studies of the optical and material properties of compound semiconductor native oxides

optoelectronic devices
fabrication and characterization of waveguides and optical components for integrated photonic ICs, semiconductor lasers and optical amplifiers

micromachining
fabrication of microelectromechanical devices utilizing Si processing, particularly reactive ion etching.