Moment feature variability in uncertain propagation channels

Greg Okopal; Patrick J. Loughlin

doi:10.1117/12.834176

3 September 2009 Moment feature variability in uncertain propagation channels

Greg Okopal, Patrick J. Loughlin

Proceedings Volume 7444, Mathematics for Signal and Information Processing; 74440U (2009) https://doi.org/10.1117/12.834176
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

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.

Citation Download Citation

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); https://doi.org/10.1117/12.834176

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