Underwater Acoustics and Signal Processing: Proceedings of the NATO Advanced Study Institute held at Kollekolle, Copenhagen, Denmark, August 18–29, 1980

Front Matter....Pages i-xv
Front Matter....Pages 1-1
Noise Sources, Radiation and Mitigation....Pages 3-28
Inhomogeneities and Instabilities in Underwater Sound Propagation....Pages 29-40
Medium Inhomogeneities and Instabilities: Effects on Spatial and Temporal Processing....Pages 41-70
Chemical Sound Absorption in the Sea....Pages 71-80
Environmental Thresholds of Ambient Noise in the Ocean....Pages 81-86
Underwater Explosives: Scaling of Source Spectra....Pages 87-91
The Remote Sensing of Factors Influencing Underwater Acoustics....Pages 93-98
Scattering from Inhomogeneities....Pages 99-124
Deterministic Propagation Modelling I: Fundamental Principles....Pages 125-132
Deterministic Propagation Modelling II: Numerical Results....Pages 133-142
Stochastic Propagation Modelling....Pages 143-150
A Brief History of Submarine Exploration of the Arctic Basin and Contiguous Marginal Sea Ice Zones....Pages 151-162
A Calculation of Complex Wavenumbers of Virtual Modes in a Pekeris Model....Pages 163-168
Ambient Noise Generation in Pack Ice....Pages 169-174
Acoustic Detection, Communication, and Signal Processing Requirements for the Optional Deployment of SSBNs in the Poseidon-X Mode in Shallow Ocean Waters....Pages 175-178
Propagation of Sound in Marine Sediments....Pages 179-186
Signal Processing Aspects of Nonlinear Acoustics....Pages 187-218
Calculation of the Accurate Difference Frequency Field of a Parametric Circular Piston....Pages 219-222
Front Matter....Pages 223-223
Modern Transducers, Theory and Practice....Pages 225-242
New Types of Transducers....Pages 243-261
Front Matter....Pages 223-223
Status of Ultrasonic Lens Development....Pages 263-279
Control of Radiated Pressure Using State Variable Feedback....Pages 281-284
Front Matter....Pages 285-285
A Review of Adaptive Antennas....Pages 287-306
Adaptive Beamforming with Emphasis on Narrowband Implementation....Pages 307-326
Random Acoustic Arrays....Pages 327-338
Array Adaptive Noise Cancellation under Signal Leakage Conditions....Pages 339-346
Multi Dimensional Constrained Lattice Processor for Adaptive Arrays....Pages 347-354
General Detection and Estimation Theory in an Adaptive Context....Pages 355-378
Detection and Estimation....Pages 379-410
Fast Algorithms for Time Domain Adaptive Array Processing....Pages 411-420
Time Delay Estimation in a Sensor Array....Pages 421-432
Modeling, Algorithmic and Performance Issues in Deepwater Ranging Sound Systems....Pages 433-439
Generalized Time Space Approach and Convolution Arrays....Pages 441-454
Recent Developments in Least Squares Model Fitting....Pages 455-469
Modern Empirical Statistical Spectral Analysis....Pages 471-497
Passive Sonar Signal Processing....Pages 499-508
Adaptive High Resolution Spatial Discrimination of Passive Sources....Pages 509-515
On Array Processing in Non-Stationary Random Fields....Pages 517-521
Response of Optimal Beamformer to Broad Angular Spectra....Pages 523-526
Two-Dimensional Digital Filtering with Applications to Image Processing....Pages 527-537
Front Matter....Pages 285-285
Two-Dimensional Spectral Estimation by Linear Prediction....Pages 539-549
Design of Two-Dimensional Digital Filters for Electron Microscopy....Pages 551-557
On the Detection of Fluctuating Signals....Pages 559-562
Nonparametric Tests for Coherent Detection....Pages 563-566
Estimation of Radial Target Length Using High Resolution Signals....Pages 567-570
Eigenvector Directions of Spectral Density Matrix....Pages 571-575
Estimation and Tracking of Frequencies of Sinusoids in Noise....Pages 577-581
Dynamic Programming for Phase and Frequency Tracking....Pages 583-588
The Underwater Medium as a Generalized Communication Channel....Pages 589-612
Physical and Descriptive Approaches to Medium-Induced Acoustic Fluctuation....Pages 613-622
Characterisation of Submarine Acoustic Transmission Channels....Pages 623-628
Front Matter....Pages 629-629
Application of Micro, Mini and Maxi Processors....Pages 631-642
High-Speed Programmable Digital Signal Processing Systems for Underwater Research....Pages 643-657
Estimates of the Channel Capacity for Acoustic Underwater Communication....Pages 659-662
Application of the Coupling of Saw-to-digital Technologies to Fast Underwater Signal Processing....Pages 663-666
Front Matter....Pages 667-667
Signal Processing in Geophysics....Pages 669-682
Radioastronomy....Pages 683-692
The Application of Advanced Pattern Recognition Techniques for the Discrimination between Earthquakes and Nuclear Detonations....Pages 693-705
Tomographic Ocean Surveillance....Pages 707-712
Front Matter....Pages 713-713
Summaries of Workshops....Pages 715-722
Back Matter....Pages 723-736