Adaptive Methods in Underwater Acoustics

Front Matter....Pages i-xiv
Front Matter....Pages 1-1
Twenty Years of Signal Processing....Pages 3-12
Ambient Noise: Characteristics of the Noise Field....Pages 13-36
An Analytical Method to Predict the Statistical Characteristics of Ambient Shipping Noise....Pages 37-48
Statistical Aspects of Sound Propagation in the Ocean....Pages 49-66
Towed Array Response to Ship Noise: A Near-Field Propagation Problem....Pages 71-80
Three-Dimensional FFP Model of Acoustic— and Elastic Wave Propagation in Horizontally Layered Media....Pages 81-88
Seismic Sensors in Underwater Acoustics: Results from Sea-Floor Measurements in Areas of Different Geology....Pages 89-94
Underwater Acoustics in the Arctic Ocean....Pages 95-101
A New Theory for the Transmission and Reflection Coefficient of Layered Systems....Pages 103-109
Second Moments of the Pressure Field Near a Smooth Caustic....Pages 111-117
Stochastic Systems Theory of the Scattering of Waves from a Random Medium....Pages 119-123
Hydrodynamic Flow Noise in Hydrophones....Pages 125-143
Wavevector Structure of Turbulent Wall Pressure and its Filtering by Normal Transmission and Spatial Averaging in Sensor Arrays....Pages 145-153
Target Strength and Echo Structure....Pages 155-172
Front Matter....Pages 173-173
Time Delay Estimation....Pages 175-196
Time Delay Estimation in the Presence of Multipath Propagation....Pages 197-206
Constrained Time Delay Estimation Via Zero-Crossing Methods....Pages 207-216
Range and Bearing Determination: Maximum Likelihood and Kalman—Bucy Techniques....Pages 217-233
Delay Estimation with Nonstationary Signals and Correlated Observation Noises....Pages 235-247
Source Parameter Estimation by Approximate Maximum Likelihood....Pages 249-257
Front Matter....Pages 173-173
On the Use of Focused Horizontal Arrays as Mode Separation and Source Location Devices in Ocean Acoustics....Pages 259-267
High-Resolution Source-Depth Estimation in Ice Covered Shallow Water....Pages 269-279
Spectrum Analysis: Overview of Classical and High Resolution Spectral Estimation....Pages 281-307
Application of High Resolution Spatial Processing Methods to Real Data of a Fixed Array in Shallow Water....Pages 309-315
Experimentation of Spatial Processing Methods....Pages 317-324
Simultaneous Estimation of Spectral Lines and of a Superimposed Continuous Spectral Density....Pages 325-332
Fitting Sinusoids to Sampled Data and Correlation Sequences....Pages 333-339
An Extended Maximum Entropy Method for High Resolution Spatial Processing....Pages 341-346
Spectral and Interspectral Analysis of Low Frequency Submarine Acoustic Signals Received on an Array of Sensors....Pages 347-354
Overview of Adaptive Array Processing....Pages 355-374
New Approaches in the Adaptive Array Processing Field....Pages 375-384
Multiple Detection Using Eigenvalues When the Noise Spatial Coherence is Partially Unknown....Pages 385-391
Theoretical and Experimental Comparisons of Optimum Element, Beam and Eigen Space Array Processors....Pages 393-398
Applications of Some Statistical Measures to Spatial Signal Processing....Pages 399-408
The Cross Correlation Matrix in Spatial Processing....Pages 409-416
The Effect of Bandwidth on the Performance of a Postbeamformer Interference Canceller....Pages 417-423
A New Approach to the Design of Broadband Element Space Antenna Array Processors....Pages 425-432
On the Role of Prior Information in Nonlinear Bearing Estimation....Pages 433-438
Beamforming by the Cross-Correlation Analysis of Received Spectra....Pages 439-446
Applications of Adaptive Array Processing....Pages 447-460
Front Matter....Pages 173-173
Adaptive Active Sonar Reception in Shallow Water Using Vertical Array Outputs Covariance Matrix Eigenvalues: Experimental Results....Pages 461-467
Beamforming with a Distorted Towed Array....Pages 469-475
Influence of Hydrophone Position Errors on Spatial Signal Processing Algorithms....Pages 477-482
A Tutorial Introduction to Nonlinear Filtering....Pages 483-496
Detection with Uncertainty: Nonparametric, Robust or Adaptive Approaches....Pages 497-514
The Design of Optimal Processors for Arrays with Non-Gaussian Noise Inputs....Pages 515-526
Adaptive Processing of Underwater Acoustic Signals in Non-Gaussian Noise Environments: I. Detection in the Space-Time Threshold Regimes....Pages 527-535
Detection and Classification Phenomena of Biological Systems....Pages 537-554
Detection and Recognition of Moving or Randomly Scaled Objects....Pages 555-561
Iterative Algorithms for Deconvolution and Reconstruction of Multidimensional Signals from Their Projections....Pages 563-579
Front Matter....Pages 581-581
Digital Signal Processing for Sonar....Pages 583-605
Optical Signal Processing....Pages 607-619
Beamforming for Sonar Signals by Means of an Incoherent Acousto-Optical Processor: Experimental Results....Pages 621-627
Adaptation of Fiber Optics to Hydrophone Applications....Pages 629-641
Ceramic Elastomer Composite Hydrophone....Pages 643-651
Expert Systems for Ship Noise Interpretation....Pages 653-670
Comparison of the Statistical and the Expert System Approach for the Interpretation of Ship Noise....Pages 671-677
Signal Processing Techniques to Analyse and Simulate Radiated Underwater Ship Propeller Noise....Pages 679-686
Signal Processing in Ocean Tomography....Pages 687-710
New Advances Towards Ocean, Acoustics and Space Integration....Pages 711-729
Front Matter....Pages 581-581
Passive Synthetic Aperture Sonar — An Analysis of the Beamforming Process....Pages 731-739
Techniques for Measuring Backscattering from the Sea Floor with an Array....Pages 741-746
Aeon-Adaptive Time-Space Array Processing....Pages 747-761
Back Matter....Pages 763-785