Localization of a Motionless Sound Source by Simultaneous Suppression of Interference Using Incoherent Aperture Synthesis

Abstract

We consider the problem of direction finding of a motionless sound source by using aperture synthesis. The emitted signal of the source is assumed to be time incoherent. This scenario is most interesting from the practical point of view, since the real sources mainly have a continuous emission spectrum. It was assumed that in addition to the sea noise, the receiving system was also affected by onboard interference caused by the mechanisms inside the carrier ship. The power of onboard interference greatly exceeded the power of the useful signal. The results of testing of the proposed algorithms using numerical and lake experiments are presented. It has been shown that, depending on the length and type of the trajectory of the carrier ship, different accuracies are achieved for the measured coordinates of a motionless source.