Underwater Acoustic Data Processing

TL;DR: In this article, the authors present a detailed overview of active and passive sonar signal processing techniques for underwater acoustic data processing, including the use of multicolor displays for sonar detection.

Abstract: I Propagation and Noise.- Fundamentals of bistatic active sonar.- Sources of low-frequency sound in the sea.- Application of the output error system identification method to the calibration of underwater acoustic transducers.- Low frequency sector scanner using NLA.- Acoustic coherence loss due to ocean boundary interactions.- Advanced methods for the investigation of the underwater channel.- A new algorithm for the identification of distorted wavefronts.- The multipath coherence function for correlated random channels and a moving source.- Vertical directionality of ambient noise at 32 N as a function of longitude and wind speed.- The influence of bubbles on acoustic propagation and scattering.- In-situ measurement of elastic properties of sea ice.- Generalized mixture noise models for U. W. A..- Some aspects of sound propagation in shallow water: estimation of source and sound channel parameters.- Mediterranean underwater ambient noise model.- Determination of the acoustic properties of the sea floor by measuring the angle dependency of the reflection coefficient.- The influence of random thermocline displacements on shallow water transmission loss.- A review of target strength estimation techniques.- Near field target strength measurements.- Efficient processing and displaying of active systems data.- Performance of incoherent pulse compression of costas signals.- A numerical and analytical approach for pulse propagation in refracting and random media.- II Signal Processing.- Future trends in sonar signal processing.- Active and passive localization: similarities and differences.- State estimation of moving active targets by reverberation analysis.- Signal processing in the linear statistical model.- Parameter estimation of signals corrupted by noise using a matrix of divided differences.- Factor analysis and estimation of covariance matrix.- Rayleigh estimates for high resolution direction finding.- High discrimination target detection algorithms and estimation of parameters.- Parametric methods for estimation of signals and noise in wavefields.- Enhanced minimum variance beamforming.- Optimal estimation and beamforming.- Adaptive processing of broadband acoustic signals.- Beamforming on linear antennas with optical processors.- Adaptive methods in temporal processing.- Passive array processing: from conventional to high resolution concepts.- Beamforming in the presence of correlated arrivals.- High-resolution spatial processing with short observation times.- Estimation for array processing of spatial noise correlations in the presence of sources.- Spatial array processing by the method CLEAN.- A robust adaptive array structure using the soft constrained LMS algorithm.- Design and development of an acoustic antenna system for industrial noise source identification.- A small aperture acoustic direction finder.- Inverse problems: a tutorial survey.- Applied modelling to underwater vehicles identification.- The effect of mismatch on array processors with normal mode replica vectors.- Robust beamforming for matched field processing under realistic environmental conditions.- Threshold extension by nonlinear techniques.- Application of acoustics in the land environment.- Systolic array implementation of parallel Kalman filtering for heave compensation in underwater acoustic data processing.- TMA performance for towed arrays of low manoeuvrability.- Multi-tracks association for underwater passive listening.- New observability criterion in target motion analysis.- Bearings only target motion analysis.- Models for the application of Kalman filtering to the estimation of the shape of a towed array.- Frequency line tracking algorithms.- Localization of far-field sources with an array of unknown geometry.- Passive localization.- Inter-array data association and target motion analysis.- Joint delay and signal determination.- III Post Processing.- Use of multicolor displays for sonar detection.- Artificial intelligence and signal understanding.- An artificial intelligence approach to multipath localization and tracking.- 3D reconstruction and recognition from multiple views and with different acquisition constraints.- Expert system applications in underwater acoustics.- Classification of ships using underwater radiated noise.- Practical experience gained during the building of an expert system for the interpretation of underwater signals.- Knowledge-based interpretation of passive sonar data.- "Constant capacity," DSP architecture - an historical perspective.- Parallel computing you can do.- Practical graph partitioning algorithms for SONAR.- Concurrency in digital signal processing.- An experimental sonar system using transputers.- Summaries of Workshops.