Underwater Target Localization and Depth Estimation Using the Nonlinear Acoustic Signals

Dear Colleagues,

Active sonar systems are widely used for detecting and estimating a submarine's location through high-frequency sound signal processing. The use of high-frequency sound signals enables the miniaturization of operating equipment and high-resolution position estimation for short-range targets. It has the disadvantage of being easily distorted by environmental mismatch factors, and the detection distance is short.

This study aims to develop a nonlinear acoustic active detection method using the high-frequency band-based active sonar system. The nonlinear acoustic active detection technique is a technique that enables signal processing in a low frequency band that is strong against environmental mismatch factors and distance compared with a high frequency signal. When the difference in frequency bands of the acoustic signals received in the high frequency band is induced in a nonlinear acoustic manner (low-frequency signal processing) corresponding to the difference frequency, the differential frequency-matching field model would be applicable. This makes it possible to develop an active detection technique that can minimize the impact of environmental mismatch.

This Special Issue deals with developing novel architectures, strategies, control, optimization and models that are robust to ocean fluctuations, and the novel active detection technique that can accurately identify underwater targets and estimate depth based on the developed model.

Dr. Sufyan Ali Memon
Dr. Wan-Gu Kim
Dr. Muhammad Attique
Dr. Ihsan Ullah
Guest Editors

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