Acoustic Communications, Modem-Based Navigation Aids, and Undersea Networks

SPEAKER: Dale Green, Teledyne BenthosABSTRACT: Over the past two years considerable interest has arisen within the world-wide academic community concerning the development of
concepts for undersea wireless networks. In this talk, I will present the core technologies developed by Teledyne Benthos on underwater acoustic
communications. Our Telesonar modem is the enabling system for the navy's Seaweb program, and it is the foundation of several underwaternavigation aids, environmental sensing systems, passive
sonar systems, and portable tracking ranges for submarines.Our Telesonar acoustic modems have a history dating back over ten years. The original modem was used as the development platform of underseanetworking via the Seaweb program from the Space and Naval
WarfareSystems Command (SPAWAR). Over the years, the capabilities of Telesonar modems have grown from a few tens of bits per second (bps) with marginal reliability to today's wide range of modulation schemes suitable for a wide range of environmental and operational conditions. At the same
time, the size and power consumption of the modem has declined dramatically. In this talk, I will describe some key features of our modems and their potential applications, such as the range rate technique, low-power wake-up, multiple access signaling, networking, and modem based navigation and environmental sensing.BIO: Teledyne Benthos is an industry leader in developing acoustic modems for underwater communication and networking. Dale Green is the
Chief Scientist at Teledyne Benthos with responsibilities for advanced developments in acoustic communications and signal processing. He
specializes in theory, algorithm development, and implementation of digital communications in adverse channels. He currently is the PI formultiple SBIR and BAA programs, and originated the concepts and
methodsused in the PUTS submarine tracking program. He is the principal architect for enhancements to the Teledyne Benthos line of acoustic modems and has for ten years supported SPAWAR in the development of
networked acoustic communications. Mr. Green was the PI for a successful feasibility study and demonstration project for providing the
Swedish Navy with a Fleet-wide acoustic communications system. He has consulted with the Swedish Navy in developing techniques for active
sonar for ASW purposes. Education: M.S., Electrical Engineering, San Diego State University; M.S., Applied Physics, University of California,San Diego; M.S., Ocean Engineering, University of
Hawaii; B.A., Mathematics, University of California, Los Angeles.HOST: Wei Ye, weiye@ISI.EDU

Location: Information Science Institute (ISI) - - 11th Floor Conference Room

Audiences: Everyone Is Invited

Contact: Mayumi Thrasher