DataVXApplied SciencesPaper
journal article·2021-05-29Open access

Array Gain of a Linear Array in an Ocean Waveguide

Zong-Wei Liu, Chun-Mei Yang, Ying Jiang, Lei Xie, Jin-Yan Du, Lian-Gang Lü

Applied Sciences· Volume 11· Issue 11
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Source abstract

Abstract

Array gain is investigated based on the acoustic channel characteristics manifested by the fluctuant transmission loss and decrease in the acoustic channel spatial coherence. An analytical expression is derived as the summation of the products of the acoustic channel correlation coefficients and root-mean-square pressures. The formula provides insight into the physical mechanisms of the gain degradation in the ocean waveguide. Furthermore, this formula provides a new method to study array gain in the ocean waveguide from underwater acoustic field. The obtained expression is a more general formula that is applicable to shallow water, deep sea, and continental slope, with the traditional methods as a special case. Numerical results show that the array gain calculated by previous formulas are generally overestimated, caused by ignoring the effect of transmission loss fluctuation.
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Research context

OpenAlex topics: Underwater Acoustics Research · Underwater Vehicles and Communication Systems · Speech and Audio Processing

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

First Institute of Oceanography, and Key Laboratory of Marine Science and Numerical Modeling, Ministry of Natural Resources, Qingdao 266061, China

Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China

School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, China

Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao 266061, China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · open foundation of Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology

References (25)

Show source-provided references
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