Dynamical evolution of sonar signal propagation

Katz, Richard A.; Quazi, Azizul H.
February 2000
AIP Conference Proceedings;2000, Vol. 502 Issue 1, p624
Academic Journal
Sonar signal propagation is traditionally modeled as a linear stochastic process. This research is aimed at modeling acoustic signal propagation dynamics deterministically using the analysis tools of Nonlinear Dynamics/Chaos Theory. This new paradigm is demonstrated by simulating a linear frequency modulated (LFM) signal and a nonlinear variation of it. The representative LFM signal simulates a realistic active source component. The nonlinear variant simulates the received echo response, that includes interactions between source, propagation channel and target. A discriminator called the differential radius (DR) is applied to the two types of simulated acoustic time series for distinguishing between the linear and nonlinear dynamics, respectively. © 2000 American Institute of Physics.


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