Roger F. Dwyer
Information Processing Branch, Naval Undersea Warfare Ctr., New London, CT 06320
Objects in motion, due to the Doppler shift, modify their spectra and to a greater extent modify their higher-order spectra. Sequential classification methods have been developed to exploit higher-order spectral information in active sonar returns. To demonstrate the ability to sequentially classify moving objects from higher-order spectra, five spheres of different composition and velocity were tested. The sequential classifier correctly identified the sphere and its velocity based on higher-order information. A comparison of the sequential classifier's performance as a function of signal-to-noise ratio using higher-order information and second-order information will be presented.