Improvement of Low-Frequency Acoustic Spatial Correlation by Frequency-Shift Compensation
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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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