Passive Sonar Data Processing, Propagation Models and the Data Crosscorrelation Matrix: A Survey

摘要

The report follows one possible development in the processing of data from passive-sonar arrays: from robust processing of stationary data using simple models, to refined processing of data acquired under non-stationary conditions, using more complex models. For such a development to take place, it is pointed out that a strong interaction between researchers in propagation modelling and those concerned with array processing seems necessary. As the level of ambition related to information extraction from the sound field is increased, some of the most common assumptions made in the processing of the data, such as stationarity, plane wavefront propagation model, etc., have to be questioned. If these assumptions do not survive, the question will be how to reformulate them and how to structure new models in such a way that they can be incorporated in the data processing (information extraction) so as to improve sonar performance. (Author)