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3 September 2009 Moment feature variability in uncertain propagation channels
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In underwater automatic target recognition via active sonar, the transmitted sonar pulse and the returning target backscatter can undergo significant distortion due to channel effects, such as frequency-dependent attenuation (damping) and dispersion, as well as random effects due to noise and other channel variability. These propagationinduced effects can be detrimental to classification because the observed backscatter depends not only on the target but also on the propagation environment and how far the wave has traveled, resulting in increased variability in the received sonar signals. Using a recently developed phase space approximation for dispersive propagation, we present a method for analyzing these effects on temporal and spectral moment features of the propagating signal, including uncertainty in certain channel parameters, in particular target distance.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Greg Okopal and Patrick J. Loughlin "Moment feature variability in uncertain propagation channels", Proc. SPIE 7444, Mathematics for Signal and Information Processing, 74440U (3 September 2009);

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