On Improving the Efficiency of Spatial Processing of Tonal Acoustic Signals in Oceanic Waveguides with Wind Waves
https://doi.org/10.59887/2073-6673.2025.18(2)-6
EDN: IUMPCF
Abstract
The possibility of increasing the efficiency of spatial processing of tonal signals in acoustic waveguides with wind waves is investigated. It is shown that preliminary frequency filtering of the signal in a narrow band in combination with known spatial processing algorithms allows to significantly increase the gain of the horizontal antenna array (AA). The main idea of the proposed spatio-temporal signal processing is to suppress the incoherent component of the acoustic field during frequency filtering of the signal. An algorithm for calculating the correlation matrix of the signal based on the transfer equation for the spatio-temporal coherence functions of complex amplitudes of acoustic modes is proposed. The results of numerical modeling of the gain factors for various signal processing algorithms in a sound channel with winter-type hydrology are obtained. The dependences of the gain factors on the distance, wind speed, bottom parameters, noise model and AA orientation are analyzed. The main attention is paid to comparing the results with and without frequency filtering.
Supporting agencies: This study was carried out within the framework of the state assignment of the IAP RAS on theme No. FFUF‑2024-0035.
About the Authors
М. А. Raevskii
A.V. Gaponov-Grekhov Institute of Applied Physics RAS
Russian Federation
Russian Federation
46 Ulyanova Str., Nizhny Novgorod, 603950
V. G. Burdukovskaya
A.V. Gaponov-Grekhov Institute of Applied Physics RAS
Russian Federation
Russian Federation
46 Ulyanova Str., Nizhny Novgorod, 603950
References
1. Eliseevnin VA. Performance of a horizontal linear antenna in shallow sea Acoustical Physics. 1983;29(1):44–49. (in Russian)
2. Eliseevnin VA. Averaged response of a horizontal linear antenna in shallow sea. Acoustical Physics. 2004;50(2):154–157. doi:10.1134/1.1675869
3. Sazontov AG., Farfel VA. Performance of a horizontal discrete antenna in a randomly inhomogeneous ocean. Acoustical Physics. 1990;36(1):130–136. (in Russian)
4. Gorodetskaya EYu, Malehanov AI, Sazontov AG, Farfel VA. Far-range sound propagation effects on gain losses in horizontal antenna arrays. Acoustical Physics. 1996;42(5):615–622. (in Russian)
5. Carey WM. Determining signal coherence length in deep and shallow water. The Journal of the Acoustical Society of America. 1998;104(2):831–837. doi:10.1121/1.423357
6. Carey WM, Lynch JF, Siegmann WL, Rozenfild I, Sperry BJ. Shallow-water sound transmission and spatial coherence. Journal of Computational Acoustics. 2006;14(2):265–298. doi:10.1142/S0218396X06003037
7. Zavolskii NA, Malekhanov AI, Raevskii MA, Smirnov AV. Effects of wind waves on horizontal array performance in shallow-water conditions Acoustical Physics. 2017;63(5):542–552. DOI: 10.1134/S1063771017040145
8. Zavolskii NA, Malekhanov AI, Raevskii MA. Comparative analysis of horizontal array processing in a shallow-water channel with a rough windy surface. Acoustical Physics. 2019;65(5):507–516. doi:10.1134/S0320791919050198
9. Burdukovskaya VG, Malekhanov AI, Raevsky MA. Influence of anisotropic wind waves on the efficiency of spatial processing of acoustic signals in shallow water. Acoustical Physics. 2021;67(6):617–625. doi:10.1134/S1063771021060026
10. Raevsky MA, Burdukovskaya VG. Effect of intermodal correlations on the efficiency of the spatial processing of acoustic signals in an oceanic waveguide with a perturbed surface Acoustical Physics. 2022;68(6):582–593. doi:10.1134/S1063771022060100
11. Raevsky MA, Burdukovskaya VG. Spatial processing of acoustic signals in oceanic waveguides on a wind noise background Acoustical Physics. 2023;69(1):102–111. DOI: 10.1134/S1063771022700063
12. Raevsky MA, Burdukovskaya VG. Models of propagation of acoustic signals and noise in oceanic waveguides with wavy surface and the effectiveness of spatial signal processing. Radiophysics and Quantum Electronics. 2024;66(12):966–987. https://doi.org/10.1007/s11141-024-10345-4
13. Raevsky MA, Burdukovskaya VG. The combined influence of wind waves and internal waves on the coherence of low-frequency acoustic signals and the efficiency of their spatial processing in shallow water Acoustical Physics. 2024;70(4):705–717. DOI: 10.1134/S1063771024601547
14. Artel’nyi VV, Raevskii MA. Statistical characteristics of normal modes in a waveguide with volume inhomogeneities Radiophysics and Quantum Electronics. 1984;27(9):804–810. https://doi.org/10.1007/BF01041390
15. Gorskaya NS, Raevsky MA. On multiple scattering of low-frequency acoustic waves by surface waves. Acoustical Physics. 1986;32(2):165–171. (in Russian)
16. Brekhovskikh LM, Lysanov YP. Theoretical foundations of ocean acoustics. Moscow: Nauka; 2007. 370 p. (in Russian)
17. Davidan IN, Lopatukhin LI, Rozhkov VA. Wind waves in the World Ocean. Leningrad: Gidrometeoizdat; 1985. 256 p. (in Russian)
18. Katsnelson BG, Petnikov VG. Shallow water acoustics. Moscow: Nauka; 1997. 193 p. (in Russian)
19. Urick RJ. Principles of underwater sound. New York: McGraw-Hill; 1975.
20. Morgan DR., Smith TM. Coherence effects on the detection performance of quadratic array processors, with applications to large-array matched-field // The Journal of the Acoustical Society of America. 1990;87(2):737–747. doi:10.1121/1.398888
21. Kuperman WA, Ingenito F. Spatial correlation of surface-generated noise in a stratified ocean // The Journal of the Acoustical Society of America. 1980;67:1988–1996. doi:10.1121/1.384439
Review
For citations:
Raevskii М.А., Burdukovskaya V.G. On Improving the Efficiency of Spatial Processing of Tonal Acoustic Signals in Oceanic Waveguides with Wind Waves. Fundamental and Applied Hydrophysics. 2025;18(2):83-95. (In Russ.) https://doi.org/10.59887/2073-6673.2025.18(2)-6. EDN: IUMPCF
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