Graduate Students

The major goals of this research are to generate a deep understanding of communi-cation channels and sources and to use this understanding in the development of reliable, efficient communication techniques. 1. Optical Communication The fundamental limitations and efficient utilization of optical channels are the cen-tral concern of these investigations. Our interests now include the atmospheric channel, the cloud channel, quantum-limited channels, and scatter channels; the investigations range from fundamental coding theorems, through near-optimum digital systems, to "adaptive " systems that measure and compensate for channel fluctuations. Partial statistical models for the turbulent atmosphere, clouds, and scattering media are now available. The performance that can be realized with these channels by digital communication, in the absence of quantum effects, is being investigated. The quantum aspects of optical communication have also been investigated. In the future these inves-tigations will be unified to obtain a better understanding of the performance limitations of optical channels. Greater emphasis will also be placed upon systems that attempt t