Patent ID: 7453769
Filing Date: 2008-11-18
Classification: G01S

Abstract:
1. A method comprising: applying a receiving-while-transmitting (RWT) sonar signal processing to at least one cavitating body, over an entire range of achievable sonar operating frequencies; applying transmit wave-form shaping to a RWT sonar system employed on said cavitating body; applying heterodyne filter frequency rejection to said RWT sonar system employed on said cavitating body; applying detection processing techniques to said RWT sonar system employed on said cavitating body; employing at least one transducer as an acoustical transmitter near a scattering body comprising said cavitating body, wherein said at least one transducer is strategically located with respect to said cavitating body, at least one target, and a receiver, wherein said receiver lies in a shadow zone of the body, but the at least one target does not; and, employing at least one transducer as an acoustical transmitter near a scattering body comprising said cavitating body, wherein said at least one transducer is strategically located with respect to a cavity, at least one target, and a receiver, wherein direct propagation of a transmitted signal along the outside of the cavity to said receiver is inhibited, and reflected propagation from said acoustical transmitter to the target and thence reflected to said receiver is not inhibited.