High resolution methods in active sonar array signal processing

摘要

In this report, the problem of high resolution array signal processing in an underwater scenario is discussed. With such methods high resolution in bearing can be obtained even for an array with a restricted length and they are therefore of great value for torpedoed target seekers. The methods may by a beam space transform also be applicable to older torpedo target seekers. Some different models for distributed sources are discussed as possible models of reverberation.nA number of methods to estimate the parameters of this kind of sources are evaluated by numerical simulations. The following methods are compared: DSPE, DISPARE, WSF, MUSIC, DML, Spread-MODE and WLS. The result was that all these methods were very sensible to modeling errors.