Research is conducted in the general areas of information theory, statistical communication theory and signal processing. More specifically, current research activities can be divided into four main thrust areas.
One area involves single and multi-user information theory, source and channel coding theory, vector quantization, coding for communications and storage, data synchronization and the Shannon theoretic analysis of communication systems with memory. The second thrust area focuses on the design, implementation and analysis of digital communication techniques, with applications to the processing and transmission of multimedia signals over wireline and wireless communication networks. This includes: low complexity signal compression, error-control coding and joint source-channel coding, bandwidth efficient coded modulation, space-time coding, diversity combining schemes for wireless transmission, analysis of synchronization procedures, analytical studies of fading models and fading channel performance, and error analysis of uncoded and coded communication systems. The third area concerns the stochastic modeling of communication network phenomena and controls, including routing, call admission, and retrials, computation of performance measures such as is in statistical communications and signal processing with special attention to time series analysis and spectrum estimation, adaptive detection techniques, and environmental effects on communications systems.