Experimental studies which, in conjunction with concurrent theoretical work, are contributing significantly to fundamental understanding of the effects of atmospheric turbulence on laser beam, speckle propagation and its application to optical remote sensing. Holmes Optical Remote Sensing Analytical and experimental studies are being made on the use of the interaction of electromagnetic radiation and turbulence to measure winds and turbulence. Recent efforts include analytical, numerical and experimental work on a CO2, optical heterodyne system for remote measurement of atmospheric cross winds and strength of turbulence. Holmes Speech and Speaker Recognition in Adverse Communication Environments Biological signals such as speech carry large amounts of information from different information sources. Typical engineering applications such as automatic speech recognition, speaker verification, or low bit-rate coding of speech may require information from only one particular source, and all other information introduces undesirable and harmful variability into the signal.
Humans appear to be able to partially separate the various information sources in the speech signal.
This ability spurred interest in modeling human-like processing of speech by modern discrete signal processing techniques. Practical application domains include adaptive signal processing, pattern recognition, speech recognition, image processing, control systems, macroeconomics, and finance. The main research interests of our group are twofold. One thrust is image processing and image recognition. One of the techniques we are working on is incorporating contextual information into recognition.