Method and device for generating underwater acoustic environment noise data based on time-frequency characteristics

Abstract

The invention discloses a method and device for generating underwater acoustic environment noise data based on time-frequency characteristics. The method and device are used for solving the problems of the requirement for rapidly generating large-scale underwater acoustic environment noise realistic simulation data in the research and test process of an underwater vehicle and low practicability ofan existing method. The method comprises the following steps that time-related characteristics and statistical distribution characteristics of an actually-measured noise data sample are analyzed, thetime-frequency characteristics of the simulated noise are extracted, then a simulated noise data generation model is obtained through processing of characteristic standardization, model parameter identification and the like, and finally, a white noise sequence is adopted to stimulate generation of needed simulated noise data by the model. According to the method, the underwater acoustic environment noise data which has a specified length and are close to any actually-measured sample characteristic can be generated without repetition, the implementation is simple and convenient, the application is flexible, and the engineering practicability is good.

Description

technical field [0001] The invention relates to the technical field of underwater environmental noise characteristic simulation, in particular to a method and device for generating underwater acoustic environmental noise data based on time-frequency characteristics. Background technique [0002] Underwater acoustic environmental noise data plays a very important role in the development and testing of underwater vehicles. In order to improve the signal detection performance of underwater vehicles in the underwater sound field, it is often necessary to use the noise data of the underwater acoustic environment to assist in determining the algorithm parameters; The noise data realizes the optimal design of the experimental scheme. [0003] There are two typical modeling methods of underwater acoustic environmental noise as follows: [0004] a) Record the measured noise as a data model: directly use the measured underwater acoustic environmental noise data as a model in the pro...

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Problems solved by technology

[0007] The present invention provides a method and device for generating underwater acoustic environmental noise data based on time-frequency characteristics. In order to solve the problem that the underwater acoustic environmental noise simulation in the prior art cannot fully and accurately assign values ​​to many parameters, the engineering practicability is greatly limited. The problem

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