Water surface and underwater target classification method based on horizontal array in shallow sea environment

Abstract

The invention belongs to the technical field of underwater acoustic engineering, ocean engineering and the like, and particularly relates to a water surface and underwater target classification method based on a horizontal array in a shallow sea environment. The method comprises the steps that a target radiation noise time sequence signal is actually measured and acquired by utilizing a shore-based horizontal array; a conventional beam forming and frequency-adaptive optimal weight array beam forming processing are carried out on each array element receiving signal, target radiation noise beam forming broadband time-frequency domain interference spectrograms under two conditions are obtained, and finally water and underwater target classification is realized based on interference fringe difference in the two interference spectrograms. The method has the advantages that the horizontal array fixed to the seabed is used for conducting different beam forming processing on the received target radiation sound signals to complete water surface and underwater distinguishing of the target, the shallow sea sound field time-frequency interference structure features are fused into the target recognition process, the processing flow is simple, the moving sound sources are rapidly classified, the target discrimination process is simple, and the result is visual.

Description

technical field [0001] The invention belongs to the fields of underwater acoustic engineering, marine engineering technology, etc., and specifically relates to a method for classifying underwater targets on the surface of the water based on a horizontal array in a shallow sea environment. , suitable for shore-based horizontal arrays, shallow sea negative climatic environments, surface targets whose target depth is on the climatic layer and underwater targets under the climatic layer. Background technique [0002] In the field of underwater acoustics, the resolution of surface and underwater targets has always been an urgent problem to be solved. Traditional methods include matching field processing and vertical array-based information processing methods based on channel characteristics. Due to the use of ocean channel characteristics, this type of method has the disadvantages of high requirements for acoustic environment parameters and complex deployment of acoustic informat...

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Problems solved by technology

On the other hand, different values ​​of the waveguide invariant correspond to significant differences in the direction of the interference fringe slope shown in the distance-frequency spectrogram

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