Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

DOA positioning method based on time reversal

A technology of time inversion and positioning method, applied in the field of wireless communication, can solve the problem of inaccurate DOA positioning, and achieve the effect of high accuracy, good effect and improved accuracy

Inactive Publication Date: 2020-05-05
CHONGQING UNIV OF POSTS & TELECOMM
View PDF8 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of inaccurate DOA positioning in a multipath environment, the present invention proposes a DOA positioning method based on time inversion, including the following steps:

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
  • DOA positioning method based on time reversal
  • DOA positioning method based on time reversal
  • DOA positioning method based on time reversal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] The present invention proposes a DOA positioning method based on time inversion, such as image 3 , including the following steps:

[0043] The base station uses a uniform linear array to transmit forward detection signals to targets in the direction of position in space, and the spectrum diagram of the forward detection signals is as follows: figure 1 shown;

[0044] The target receives the forward detection signal and sends a return signal, and the ...

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 relates to the technical field of wireless communication, in particular to a DOA positioning method based on time reversal, which comprises the following steps: a base station transmitsa forward detection signal to a target in a position direction in space by adopting a uniform linear array; the target receives the forward detection signal and sends a return signal, and the base station receives and records the return signal; constructing a uniform linear array DOA positioning model, and performing frequency domain conjugation and energy normalization processing on the returnedsignal by the base station by utilizing the model; the base station retransmits the processed signal to the space, and records a time reversal backhaul matrix signal reflected by the target position;carrying out angle estimation on the time reversal backhaul matrix signal by utilizing a characteristic subspace decomposition method to obtain an angle estimation value of the target position. According to the invention, the positioning service with higher accuracy can be provided.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a DOA positioning method based on time reversal. Background technique [0002] Positioning refers to the process of obtaining the spatial position of the target object through certain technical means. Early positioning and navigation mainly relied on equipment such as compass, compass and sextant, whose positioning accuracy was low, and was subject to weather conditions and user experience. At the beginning of the 20th century, the rise of radio technology revolutionized positioning technology and ushered in a key technological breakthrough. Wireless positioning technology uses radio waves as the carrier, and achieves the positioning of target objects by measuring parameters such as the transmission time, energy, direction and phase of radio waves. In recent years, due to the development of computer technology and wireless communication technology, the applicatio...

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 Applications(China)
IPC IPC(8): H04W64/00G01S5/04G01S5/02
CPCH04W64/00G01S5/021G01S5/04
Inventor 李方伟鲁佳文张齐林代超蓝王明月
Owner CHONGQING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com