Patent ID: 6525990
Filing Date: 2003-02-25
Classification: G01S

Abstract:
A target simulation system comprising:a hydrophone for receiving an original acoustic test signal and converting said original acoustic test signal to an analog electrical test signal; a signal processing system wherein: an A/D converter for converting said analog electrical test signal to a digital test signal, a computer system coupled to said A/D converter for modifying said digital test signal to form a simulated reflected signal emulating said original acoustic test signal reflecting from a target having a known target strength, said computer system including a computer program for adding a target strength value to values of said digital test signal to form said simulated reflected signal, and a D/A converter coupled to said computer system for converting said simulated reflected signal to analog format; and a projector for receiving said simulated reflected signal in analog format and for converting said simulated reflected signal in analog format to a simulated reflected acoustic signal.