Paper Info
Title
Estimating time delay and transfer function parameters using wideband transient signals
Abstract
Experiments with a J15 moving-coil electrodynamic transducer are used to demonstrate the effectiveness of the output error method of identifying black-box transfer function models for underwater acoustic projectors and to introduce the signal energy centroid as a measure of the signal time of arrival for wideband signals transmitted through dispersive systems. The shift in the energy centroid or energy delay is shown to provide a direct and natural means of measuring an effective time delay between two signals that are not simply shifted replicas of each other. An expression is obtained relating the energy delay to the signal and system spectra. For a signal with a phase spectrum that is a linear function of frequency, the energy delay is shown to be an energy-density-weighted average of the system group delay. For a linear-phase signal and system, or for a distortion-free system, the energy delay reduces to simply the constant group delay of the system
Year
DOI
Venue
1988
10.1109/ICASSP.1988.197219
New York, NY
Keywords
DocType
ISSN
acoustic signal processing,acoustic transducers,delays,electrodynamics,electronic equipment testing,moving-coil instruments,parameter estimation,signal detection,transfer functions,transients,underwater sound,j15 moving-coil electrodynamic transducer,black-box transfer function models,dispersive systems,distortion-free system,energy delay,energy shift,energy-density-weighted average,linear function,output error,phase spectrum,signal energy centroid,signal time of arrival,system group delay,time delay,transfer function,underwater acoustic projectors,wideband transient signals,underwater acoustics,signal processing,linear phase,time measurement,time of arrival,spectrum
Conference
1520-6149
Citations 
PageRank 
References 
0
0.34
0
Authors
2
Name
Order
Citations
PageRank
George, J.D.121.48
Goodman, D.M.200.34