Check patentability & draft patents in minutes with Patsnap Eureka AI!

A Method of Underwater Acoustic Signal Processing Based on Sparse Representation

An underwater acoustic signal, sparse representation technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of inability to represent line spectrum information well, large error in the recovered signal, etc., to achieve small errors, low reconstruction errors, strong The effect of sparsity

Active Publication Date: 2021-11-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: aim at the problems existing in the prior art, provide a kind of underwater acoustic signal processing method based on sparse representation, solve the problem that the existing sparse representation method of underwater acoustic signal cannot represent the line spectrum information well, and the error of the restored signal is often bigger

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Method of Underwater Acoustic Signal Processing Based on Sparse Representation
  • A Method of Underwater Acoustic Signal Processing Based on Sparse Representation
  • A Method of Underwater Acoustic Signal Processing Based on Sparse Representation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Underwater acoustic signals are sparse under a specific dictionary. Using sparse representation theory to solve problems in the field of underwater acoustic signals is a research hotspot in recent years. This embodiment applies sparse representation to actual underwater acoustic signals radiated by ships.

[0034] This embodiment provides a method for processing underwater acoustic signals based on sparse representation, the method comprising:

[0035] 1. Construct a Fourier dictionary.

[0036] 2. Construct a dictionary based on Mel filter banks.

[0037] 3. Construct a composite dictionary.

[0038] 4. Construct a sparse representation model.

[0039] 5. Sparsely represent the underwater acoustic signal by using the sparse representation model.

[0040] figure 1 It is a spectrogram of a measured underwater acoustic signal of a ship. The signal duration is 0.5 seconds and the sampling frequency is 2048Hz. It can be seen from the figure that the ship signal has ene...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a method for processing underwater acoustic signals based on sparse representation, the method comprising: (1), constructing a Fourier dictionary D1; (2), constructing a dictionary D based on Mel filter banks 2 ; (3), construct compound dictionary D=[D 1 D. 2 ]; (4), construct a sparse representation model (5) use the sparse representation model to perform sparse representation of the underwater acoustic signal. When the present invention is applied, not only the main line spectrum features of the signal are represented, but also the energy trend of the signal is clearly preserved, the sparse decomposition result has the smallest error, which is very close to the target signal to be reconstructed, and the restored signal has the smallest error .

Description

technical field [0001] The invention relates to the field of underwater acoustic signal processing, in particular to an underwater acoustic signal processing method based on sparse representation. Background technique [0002] At present, the main sparse representation method of underwater acoustic signal is the sparse representation of a single dictionary, and the sparse representation is performed by constructing a Fourier dictionary or a dictionary based on a Mel filter bank. [0003] Based on the traditional single dictionary, the complex mixed signal composed of line spectrum signal and continuous envelope cannot be effectively sparsely represented at the same time. [0004] The Fourier dictionary effectively preserves some single-line spectral points with relatively large amplitudes, but the spectrum envelope trend of the original signal is not represented, so the Fourier dictionary has certain limitations in retaining the target continuous spectrum components. Althou...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/539
CPCG01S7/539
Inventor 钱江吕少春王开民王璐
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com