Ownship interference cancellation and source localization

Ownship radiated noise, direct and multipath, is a major source of interference that masks target signatures and makes them undetectable by classical techniques. It is especially a problem in the case of fast ship speeds and short tow cables in shallow water environments. In such cases, interference suppression techniques are needed to cancel this noise and unmask signals while maintaining a low false alarm rate. The paper shows that beamformers that account for the environmental conditions and suppress the interference provide substantial gains. Matching to the propagation conditions is particularly important. These gains become limited when the environment is progressively inaccurately specified