Method for locating multiple rays of a source with or without AOA by multi-channel estimation of the TDOA and FDOA

A positioning method, technology of reflection path, applied in positioning, directional multi-channel system using radio waves, direction finder using radio waves, etc.

Inactive Publication Date: 2012-01-04
THALES SA
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the disadvantage of these methods is that they assume prior knowledge of the ionosphere

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
  • Method for locating multiple rays of a source with or without AOA by multi-channel estimation of the TDOA and FDOA
  • Method for locating multiple rays of a source with or without AOA by multi-channel estimation of the TDOA and FDOA
  • Method for locating multiple rays of a source with or without AOA by multi-channel estimation of the TDOA and FDOA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] modeling

[0051] The method according to the invention involves, with the aid of an array comprising N elementary sensors, locating a source when there are direct paths and P≧1 temporally decorrelated paths. The path comes from reflections of P obstacles whose positions are known. figure 1 The case is shown for an array comprising N=6 sensors receiving both direct and reflected paths from the source. In this case P=1.

[0052] When the source has P-1 reflection paths, the expression for the signal received by the sensor array can be written as:

[0053] x ( t ) = x 1 ( t ) · · · ...

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 a method and to a system for locating a transmitter E transmitting a signal to a receiver A comprising N channels (N=1), the characteristics of said signal being unknown to the receiver and said signal being reflected by P reflectors Bi (P=1) with known positions, characterised in that the method comprises at least the following steps: Step 1: a step of multi-channel joint estimation / detection of the time differences of arrival or TDOA ti and the frequency differences of arrival or FDOA fi of each reflected ray; Step 2: a step of angular estimation of the direction Theta 1 of the direct ray of the signal emitted using a goniometry method; Step 3: a step of locating the position (x, y) of transmitter E in the plane at least on the basis of the pairs (ti, fi).

Description

technical field [0001] The invention relates to a method for locating a transmitter in two or three dimensions when there are multiple paths from a direct path and one or more reflected paths from obstacles whose positions are known. The path is received by a single multi-channel receiving system, the location of which is also known. The method according to the invention is based on a signal processing method. Background technique [0002] figure 1 An exemplary positioning system is shown that includes a multi-sensor receiving station at a known location A that receives a direct path and a path reflected from an obstacle at a known location B. These two received paths are transmitted by the source E whose position is to be located. The receiving station at position A receives the incident angle θ from the transmitting source E 1 The direct path of , and the reflection from the obstacle at B with an angle of incidence θ 2 path of. Locating the transmitter requires on th...

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): G01S5/12G01S3/74G01S5/02
CPCG01S5/0215G01S5/12G01S3/74G01S5/0218
Inventor C·耶蒙德A·费雷奥尔
Owner THALES SA
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