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- Title
Comparative Analysis of the Noise Immunity of Algorithms for Reconstructing Seabed Geoacoustic Parameters by the Coherent Sounding Technique.
- Authors
Kalinina, V. I.; Smirnov, I. P.; Khilko, A. I.; Malekhanov, A. I.
- Abstract
Based on a previously developed numerical model, a comparative analysis of the efficiency of algorithms for reconstructing the geoacoustic parameters for a seabed with a layered structure is carried out based on probing signals in a synchronized sequence of mutually coherent complex signals. The algorithms differ in how the multiparameter criterion function is constructed; when its extremum is found, it yields an estimate of the required parameters. As such functions, the root-mean-square norm of the signal mismatch, functionals of generalized MUSIC methods, and neuronlike convolution are used. The stability of the estimates obtained (in terms of the mean bias and variance of deviations from the true value) is investigated by stochastic modeling as a function of the signal-to-noise ratio at the receiver inputs. It is shown that the considered algorithms exhibit significantly different noise immunity, which in turn depends on which particular parameter is to be estimated.
- Subjects
COMPARATIVE studies; ALGORITHMS; SIGNAL-to-noise ratio; NOISE; IMMUNITY; OCEAN bottom
- Publication
Acoustical Physics, 2021, Vol 67, Issue 4, p381
- ISSN
1063-7710
- Publication type
Article
- DOI
10.1134/S1063771021040035