{"title":"Models of Propagation of Acoustic Signals and Noise in Oceanic Waveguides with Wavy Surface and the Effectiveness of Spatial Signal Processing","authors":"M. A. Raevskii, V. G. Burdukovskaya","doi":"10.1007/s11141-024-10345-4","DOIUrl":null,"url":null,"abstract":"<p>We study the effectiveness of spatial signal processing at the apertures of the vertical and horizontal antenna arrays for acoustic waveguides with irregular free boundaries. The main attention is paid to a joint use of statistical models of signal and noise, which is generated near the waveguide boundary by dipole sources, and optimal algorithms for processing of partially coherent signals. The proposed signal and noise models allow for the effects of multiple scattering of acoustic modes. On the basis of the obtained theoretical results, we perform computations of the gain of the antenna arrays of various orientations for an oceanic waveguide with a wavy surface and regular parameters, which are typical of shallow sea. The dependences of the antenna-array gain on the distance and wind velocity are analyzed for various spatial-processing algorithms. The influence of the intermode signal correlations and the statistical model of noise on these results is discussed.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"66 12","pages":"966 - 987"},"PeriodicalIF":0.8000,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Radiophysics and Quantum Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11141-024-10345-4","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
We study the effectiveness of spatial signal processing at the apertures of the vertical and horizontal antenna arrays for acoustic waveguides with irregular free boundaries. The main attention is paid to a joint use of statistical models of signal and noise, which is generated near the waveguide boundary by dipole sources, and optimal algorithms for processing of partially coherent signals. The proposed signal and noise models allow for the effects of multiple scattering of acoustic modes. On the basis of the obtained theoretical results, we perform computations of the gain of the antenna arrays of various orientations for an oceanic waveguide with a wavy surface and regular parameters, which are typical of shallow sea. The dependences of the antenna-array gain on the distance and wind velocity are analyzed for various spatial-processing algorithms. The influence of the intermode signal correlations and the statistical model of noise on these results is discussed.
期刊介绍：
Radiophysics and Quantum Electronics contains the most recent and best Russian research on topics such as:
Radio astronomy;
Plasma astrophysics;
Ionospheric, atmospheric and oceanic physics;
Radiowave propagation;
Quantum radiophysics;
Pphysics of oscillations and waves;
Physics of plasmas;
Statistical radiophysics;
Electrodynamics;
Vacuum and plasma electronics;
Acoustics;
Solid-state electronics.
Radiophysics and Quantum Electronics is a translation of the Russian journal Izvestiya VUZ. Radiofizika, published by the Radiophysical Research Institute and N.I. Lobachevsky State University at Nizhnii Novgorod, Russia. The Russian volume-year is published in English beginning in April.
All articles are peer-reviewed.
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