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DORT applied to active sonar

Authors: David M. Fromm; Charles F. Gaumond;

DORT applied to active sonar

Abstract

The decomposition of the time reversal operator (DORT) is a single frequency method of spatially isolating scatterers with a multiple-source/multiple-receiver system [C. Prada et al., J. Acoust. Soc. Am. 99, 2067–2076 (1996)]. The application of the DORT technique to a broadband sonar system is explained by showing its relationship to the sonar equation. The orthogonal matrices are related to source and receiving steering vectors and the singular values to the echo levels of the various signal components. The structure of a coherent, reverberation-limited, broadband, numerical sonar model is shown. Numerical results from this sonar model are processed by windowing and Fourier transforming. Then DORT is applied and the depth isolated target components are identified through projecting source and receiver steering vectors with modeled propagation matrices. The ability of this procedure to isolate scatterers from distributed bottom reverberation is shown for a set of source/receiver geometries with the scatterer at various depths and ranges. Both range-independent and range-dependent environments are considered. [Research sponsored by ONR.]

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Average
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