January 1991	VOLUME 16	NUMBER 1	IJOEDY	(ISSN 0364-9059)

 SPECIAL ISSUE ON Ocean Acoustic Data Telemetry

NONTECHNICAL CONTENT
		Front cover and table of contents
		Back cover
GUEST EDITORIAL
Josko A. Catipovic		Guest Editorial		1
SPECIAL ISSUE PAPERS
Timothy F. Duda		Modeling weak fluctuations of undersea telemetry signals		3
Abolfazl Falahati, Bryan Woodward, and Stephen C. Bateman		Underwater acoustic channel models for 4800 b/s QPSK signals		12
John G. Proakis		Adaptive equalization techniques for acoustic telemetry channels		21
Geir Helge Sandsmark and Arne Solstad		Simulations of an adaptive equalizer applied to high-speed ocean acoustic data transmission		32
Meir Feder and Josko A. Catipovic		Algorithms for joint channel estimation and data recovery--Application to equalization in underwater communications		42
Hyuck M. Kwon and Theodore G. Birdsall		Digital waveform codings for ocean acoustic telemetry		56
John G. Proakis		Coded modulation for digital communications over Rayleigh fading channels		66
Samir S. Soliman		Synchronization issues in ocean telemetry		74
Josko A. Catipovic and Lee E. Freitag		Spatial diversity processing for underwater acoustic telemetry		86
JoEllen Wilbur and John Bono		Wigner/cycle spectrum analysis of spread spectrum and diversity transmissions		98
Jean-Noël Decarpigny, Bernard Hamonic, and Oscar Bryan Wilson Jr.		The design of low frequency underwater acoustic projectors: Present status and future trends		107
Rodney F. W. Coates		The design of transducers and arrays for underwater data transmission		123
Adam Zielinski and Lixue Wu		A novel array of ring radiators		136
Predrag Vukadin and Goran Hudec		Acoustic telemetry system for underwater control		142
Michael S. Triantafyllou and Mark A. Grosenbaugh		Robust control for underwater vehicle systems with time delays		146
Günter Niemeyer and Jean-Jacques E. Slotine		Stable adaptive teleoperation		152
REGULAR ISSUE PAPERS
Lucy R. Wyatt		High-frequency radar measurements of the ocean wave-directional spectrum		163