Digital Communication Techniques for Underwater Acoustic Channels

Prof. John G. Proakis

University of California, San Diego

Abstract:

Underwater acoustic channels are generally characterized as randomly time-varying multipath channels. In this presentation, the characteristics of these channels are described in terms of their time-varying impulse response, time dispersion, frequency dispersion, path loss and additive noise. Then, the design of modulation/demodulation and coding/decoding techniques are considered, including single carrier and multicarrier transmission, turbo coding/decoding, and equalization for intersymbol interference. The performance of these techniques are assessed from the viewpoint of bandwidth efficiency and signal processing requirements.

Biography:

Dr. Proakis is Professor Emeritus at Northeastern University and an Adjunct Professor at the University of California, San Diego. He was a faculty member at Northeastern University from 1969 through 1998 and held the following academic positions: Associate Professor of Electrical Engineering, 1969-1976; Professor of Electrical Engineering, 1976-1998; Associate Dean of the College of Engineering and Director of the Graduate School of Engineering, 1982-1984; Chairman of the Department of Electrical and Computer Engineering, 1984-1997.

His professional experience and interests are in the general areas of digital communications and digital signal processing. He is the co-author of the books Digital Communications (New York: McGraw-Hill, 2008, 5th ed.), Introduction to Digital Signal Processing ( Upper Saddle River, NJ: Prentice Hall, 2007, 4th ed.); Digital Signal Processing Laboratory (Englewood Cliffs: Prentice-Hall, 1991); Advanced Digital Signal Processing (New York: Macmillan, 1992); Digital Processing of Speech Signals (New York: Macmillan, 1992, IEEE Press, 2000); Communication Systems Engineering, (Upper Saddle River, NJ: Prentice Hall, 2002, 2nd ed.); Digital Signal Processing Using MATLAB (Stamford, CT: Cengage Learning, 2012, 3rd ed.); Contemporary Communication Systems Using MATLAB (Stamford, CT: Cengage Learning, 2012, 3rd ed.); Algorithms for Statistical Signal Processing(Upper Saddle River, NJ: Prentice Hall, 2002); Fundamentals of Communication Systems (Upper Saddle River, NJ: Prentice Hall, 2005).