{"title":"模拟具有粗糙海面的浅波导中垂直阵列的增益","authors":"M. A. Raevsky, V. G. Burdukovskaya","doi":"10.1134/S1063771023600651","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of developed wind waves on the gain of a vertical array in shallow ocean waveguides is studied analytically and numerically. An algorithm is proposed for calculating the model correlation matrix of the signal at the aperture of the vertical array, taking into account the interference structure of the acoustic field in the sound channel. The antenna gain is analyzed for three spatial processing methods: standard phased array, optimal linear processing method, and optimal quadratic processing. The numerical simulation results for winter hydrological conditions in the Barents Sea are presented. The main focus is the dependence of the antenna gain values, “smoothed” on the scale of the interference structure of the acoustic field in the waveguide, the wind speed, and seabed sediment characteristics. The influence of intermode correlations on the results of gain simulation for various signal processing methods is analyzed in detail. It is shown that ignoring intermode correlations in the case of a vertical array leads to fundamentally erroneous results with optimal processing methods.</p></div>","PeriodicalId":455,"journal":{"name":"Acoustical Physics","volume":"70 2","pages":"350 - 359"},"PeriodicalIF":0.9000,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Simulating the Gain of a Vertical Array in a Shallow Waveguide with a Rough Sea Surface\",\"authors\":\"M. A. Raevsky, V. G. Burdukovskaya\",\"doi\":\"10.1134/S1063771023600651\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The influence of developed wind waves on the gain of a vertical array in shallow ocean waveguides is studied analytically and numerically. An algorithm is proposed for calculating the model correlation matrix of the signal at the aperture of the vertical array, taking into account the interference structure of the acoustic field in the sound channel. The antenna gain is analyzed for three spatial processing methods: standard phased array, optimal linear processing method, and optimal quadratic processing. The numerical simulation results for winter hydrological conditions in the Barents Sea are presented. The main focus is the dependence of the antenna gain values, “smoothed” on the scale of the interference structure of the acoustic field in the waveguide, the wind speed, and seabed sediment characteristics. The influence of intermode correlations on the results of gain simulation for various signal processing methods is analyzed in detail. It is shown that ignoring intermode correlations in the case of a vertical array leads to fundamentally erroneous results with optimal processing methods.</p></div>\",\"PeriodicalId\":455,\"journal\":{\"name\":\"Acoustical Physics\",\"volume\":\"70 2\",\"pages\":\"350 - 359\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2024-07-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acoustical Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1063771023600651\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"ACOUSTICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acoustical Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063771023600651","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ACOUSTICS","Score":null,"Total":0}
Simulating the Gain of a Vertical Array in a Shallow Waveguide with a Rough Sea Surface
The influence of developed wind waves on the gain of a vertical array in shallow ocean waveguides is studied analytically and numerically. An algorithm is proposed for calculating the model correlation matrix of the signal at the aperture of the vertical array, taking into account the interference structure of the acoustic field in the sound channel. The antenna gain is analyzed for three spatial processing methods: standard phased array, optimal linear processing method, and optimal quadratic processing. The numerical simulation results for winter hydrological conditions in the Barents Sea are presented. The main focus is the dependence of the antenna gain values, “smoothed” on the scale of the interference structure of the acoustic field in the waveguide, the wind speed, and seabed sediment characteristics. The influence of intermode correlations on the results of gain simulation for various signal processing methods is analyzed in detail. It is shown that ignoring intermode correlations in the case of a vertical array leads to fundamentally erroneous results with optimal processing methods.
期刊介绍：
Acoustical Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It covers theoretical and experimental aspects of basic and applied acoustics: classical problems of linear acoustics and wave theory; nonlinear acoustics; physical acoustics; ocean acoustics and hydroacoustics; atmospheric and aeroacoustics; acoustics of structurally inhomogeneous solids; geological acoustics; acoustical ecology, noise and vibration; chamber acoustics, musical acoustics; acoustic signals processing, computer simulations; acoustics of living systems, biomedical acoustics; physical principles of engineering acoustics. The journal publishes critical reviews, original articles, short communications, and letters to the editor. It covers theoretical and experimental aspects of basic and applied acoustics. The journal welcomes manuscripts from all countries in the English or Russian language.
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