By Topic

Use of an analytic signal to model interaction between an acoustic wave and a moving target with a time-dependent velocity

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Gimenez, G. ; Inst. Nat. des Sci. Appliques de Lyon, Villeurbanne, France ; Cachard, C. ; Vray, D.

The formalism of the analytic signal and its complex envelope is used to model the interaction between an acoustic wave and a moving target in applications involving the Doppler effect. Specifically, it is shown that modeling by means of analytic signal and related concepts is suitable for the interaction between a probing acoustic wave and the scatters included in the investigated medium through which the wave propagates. When such a scatterer is a moving target, the interaction can be viewed as an angular modulation: phase modulation or frequency modulation, depending on which parameter is used as the carried message. The act of demodulating by means of a two-channel lock-in amplifier follows this theoretical modeling closely because this device simply extracts the complex envelope from the modulated signal. In the case of a target with time-dependent velocity, this modeling is very useful because the experimental results are actually the instantaneous phase and the instantaneous frequency of the complex envelope associated with the modulated signal. In this sense the physical phenomenon of interaction between an acoustical wave and a moving target (Doppler effect) can be depicted easily and clearly. Experimental results obtained with a continuous probing wave interacting with a single bubble moving in a fluid at rest are given to illustrate the proposed approach.<>

Published in:

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:37 ,  Issue: 3 )