Ultra-short base line orientation estimation method and system of any formation, equipment and storage medium

An ultra-short baseline and azimuth estimation technology, applied in radio wave measurement systems, positioning, direction finders using ultrasonic/sonic/infrasonic waves, etc., can solve problems such as inability to expand complex formations and performance degradation

Active Publication Date: 2019-09-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The performance of the current broadband ultra-short baseline method deteriorates sharply wh

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
  • Ultra-short base line orientation estimation method and system of any formation, equipment and storage medium
  • Ultra-short base line orientation estimation method and system of any formation, equipment and storage medium
  • Ultra-short base line orientation estimation method and system of any formation, equipment and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0095] An ultra-short baseline azimuth estimation method for an arbitrary formation proposed by the present invention obtains an incoming wave azimuth estimation result by constructing a wideband joint matching maximum likelihood estimation of a general formation.

[0096] Such as figure 1 As shown, the overall implementation process is completed in three steps:

[0097] Step 1) Initialize the delay adjustment matrix and the distributed search grid;

[0098] Step 1-1) construct delay adjustment matrix;

[0099] The center carrier frequency of the communication waveform signal is f c , the signal bandwidth is B, and the received signal x(t) becomes a zero-IF baseband signal x after mixing 1 (t); Delay the original received signal by time d, that is, x(t-d), and turn it into a zero-IF baseband signal x after mixing 2 (t), then there are:

[0100] x 2 (t)=x 1 (t-d)exp{-j2πf c d} (1)

[0101] The function of the complex exponential product term is to make up for the resid...

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 provides an ultra-short base line orientation estimation method for any formation. The method comprises the steps of initializing a delay adjustment matrix according to a received signal and a delay signal thereof, thus acquiring a delay adjustment matrix function, and initializing a distributed search network; detecting the arrival time of the signals, determining synchronous moments, sampling the synchronous moments, building a synchronous sampling moment set, thus acquiring a reference array element sampling sequence of the signal arrival moments; and computing the rotated distributed search network, computing a matched peak of each direction vector under the synchronous sampling moment set according to the reference array element sampling sequence of the signal arrival moments and the delay adjustment matrix function, and traversing orientation angles, wherein the direction of the maximum matched peak is the final estimated orientation vector. The ultra-short base line orientation estimation method for any formation provided by the invention can be expanded to various complex formations, and is stable in performance when the part of array elements is invalid, and high in estimation accuracy of the distance and orientation of the target signal source.

Description

technical field [0001] The invention belongs to the field of underwater autonomous vehicle position measurement in a seabed observation network, and in particular relates to a method, system, device and storage medium for estimating an ultra-short baseline orientation of an arbitrary formation. Background technique [0002] The ultra-short baseline uses multiple array elements to receive the target signal, and realizes the estimation of the distance and azimuth of the target signal source according to the signal arrival time and the phase difference received by the multiple array elements. The ultra-short baseline has the characteristics of small matrix and simple structure, and is widely used in the position determination of manned submersibles and unmanned submersibles by the mother ship, and the control of the docking process of underwater autonomous vehicles in the submarine observation network. [0003] The traditional single-frequency ultra-short baseline is susceptibl...

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): G01S3/82G01S5/20G01S5/30
CPCG01S3/82G01S5/20G01S5/30
Inventor 武岩波刘学承朱敏房小芳
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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