Water acoustic channel phase-frequency response correction method based on RAM model

A frequency response, underwater acoustic channel technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of increasing the time for the calculation of the frequency response of the underwater acoustic channel.

Active Publication Date: 2019-05-31
SOUTHEAST UNIV
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in resolution will lead to a significant increase in the

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
  • Water acoustic channel phase-frequency response correction method based on RAM model
  • Water acoustic channel phase-frequency response correction method based on RAM model
  • Water acoustic channel phase-frequency response correction method based on RAM model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] In the following, in conjunction with the drawings and specific embodiments, the present invention is further illustrated through Example 1.

[0065] A phase-frequency response correction method of underwater acoustic channel based on RAM model, such as figure 1 Shown specifically includes the following steps:

[0066] Step (1) Set the following parameters:

[0067] Sound source depth Z s =20m, receiver depth Z r = 30m, the distance between the sound source and the receiver R = 2000m, frequency resolution Δf = 1Hz, the lower frequency limit f low =300Hz, frequency upper limit f high =330Hz.

[0068] Marine environment parameters at p positions from the sound source to the receiver, the distance between the i-th position and the sound source is r i , The sound velocity profile is SSP i , The sea depth is H si , The seabed density is ρ bi , The bottom sound velocity is c bi , The seabed absorption coefficient is α i , I=1,2,3,...,p.

[0069] In this embodiment, p=5, and the ma...

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 invention discloses a water acoustic channel phase-frequency response correction method based on a RAM model. The method comprises the following steps of: (1) setting marine environmental parameters, simulating upper and lower limits of the frequency and a frequency resolution, transferring a RAM model to calculate frequency response at each frequency sampling point, and setting a variable k initial value as 2; (2) constructing a water acoustic channel phase-frequency response original value sequence; (3) calculating a stepping prediction value from a frequency sampling point 0 to a frequency sampling point 1; (4) solving a phase correction value of the frequency sampling point 1 according to the phase original value and the stepping prediction value of the frequency sampling point 1;(5) calculating the stepping prediction value of the sampling point k according to the phase correction values of the frequency sampling points k-2 and k-1; (6) solving a phase correction value of thefrequency sampling point k according to the phase original value and the stepping prediction value of the frequency sampling point k; and (7) repeating the steps (5) and (6) until phase correction ofall the frequency sampling points is completed so as to construct a phase correction value sequence of the water acoustic channel phase-frequency response.

Description

Technical field [0001] The invention belongs to the technical field of sonar signal simulation, and particularly relates to a phase-frequency response correction method of an underwater acoustic channel based on a RAM model. Background technique [0002] The simulation of acoustic propagation characteristics is an important part of sonar signal simulation. The simulation of acoustic propagation characteristics is usually based on the set sound field environment, the position of the sound source and the receiver, and the sound propagation model is used to simulate and calculate the frequency response from the sound source position to the receiver position, and the underwater acoustic channel impulse response is obtained through the frequency response Function, and then convolve the sound source signal with the underwater acoustic channel impulse response function to get the received signal. [0003] The sound source in the ocean is usually a broadband sound source. The most commonl...

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
IPC IPC(8): G01S7/52
Inventor 安良方世良陈良鑫王晓燕姚帅罗昕炜
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap