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Improvement of Low-Frequency Acoustic Spatial Correlation by Frequency-Shift Compensation |
| ZHANG Ren-He;SU Xiao-Xing;LI Feng-Hua |
| National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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ZHANG Ren-He, SU Xiao-Xing, LI Feng-Hua 2006 Chin. Phys. Lett. 23 1838-1841 |
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Abstract Interference of normal modes can lead to longitudinal decorrelation of an ocean acoustical field, so it can decrease the gain of a wide-aperture array. Based on waveguide invariance, we propose a frequency-shift compensation method that can be used to improve the signal correlation received at different locations with certain longitudinal separations. The method is verified by experimental data.
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| Keywords:
43.30.Bp
43.30.Re
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Published: 01 July 2006
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| PACS: |
43.30.Bp
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(Normal mode propagation of sound in water)
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43.30.Re
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(Signal coherence or fluctuation due to sound propagation/scattering in the ocean)
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