Matching locating method based on wireless channel frequency domain amplitude response

An amplitude response, wireless channel technology, applied in the field of wireless signal to determine its position, can solve problems such as affecting positioning accuracy, limiting positioning accuracy, low sensitivity to spatial position differences, etc.

Inactive Publication Date: 2009-09-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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AI Technical Summary

Problems solved by technology

Although this method overcomes the traditional indoor wireless positioning technology affected by NLOS propagation and multipath effects, and improves the positioning accuracy to a certain extent; but because it only uses the RSS characteristics of the channel impulse response (CIR) in wireless The sensitivity to spatial position differences is low, thus affecting the positioning accuracy and limiting the further improvement of positioning accuracy

Method used

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  • Matching locating method based on wireless channel frequency domain amplitude response
  • Matching locating method based on wireless channel frequency domain amplitude response
  • Matching locating method based on wireless channel frequency domain amplitude response

Examples

Experimental program
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Embodiment Construction

[0048] Taking the two-dimensional positioning of a target to be located in a square room with a side length equal to 60 meters as an example, four signal receivers p 1 ,p 2 ,p 3 ,p 4 Set at the coordinates (10, 10), (10, 50), (50, 10) and (50, 50) respectively, the unit is meter (m); and the sampling is set at intervals of 0.5×0.5 meters throughout the room points, a total of 14400 nodes;

[0049] A. Establish a positioning database: place a transmittable signal on the node coordinates (0.5, 0.5) of the positioning grid as:

[0050] s ( t ) = 1 A d ( t )

[0051] The library building signal source S,

[0052] Where: t=1, 2, ..., 256; d ( t ) = Σ ω = 1 ...

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Abstract

The invention belongs to a method for locating indoor wireless propagated signal source, comprising the following steps of: adopting a database-setting signal source to set up a location database, defining a frequency domain amplitude response parameter between each receiver and each target, and defining the position of the targets which are to be located. Because the invention adopts a signal with the shape of normalized gammagram as a database-setting signal to define a normalized frequency domain amplitude response parameter of wireless propagation channel between each node and each receiver, define a first location parameter corresponding thereto and the database for setting up location, and locate the targets which are to be located, and uses the space difference of multipath propagation and indirect wave propagation between the targets which are to be located and each signal receiver in the location method to conquer negative effects, the invention has the advantages that the sensitivity to position difference in location area can be effectively improved, time synchronicity demand and location cost can be reduced, as well as location accuracy and location precision can be promoted, etc.

Description

technical field [0001] The invention belongs to a method for locating a wirelessly propagated signal source, in particular a method involving one or more receivers receiving wireless signals sent by a target to be positioned to determine its position; the method utilizes each receiver and The signal source is located by the spatial difference of channel frequency domain amplitude response during wireless propagation between targets to be located. Using the invention to determine the position of the target to be positioned can not only overcome the negative effects of multipath propagation and non-direct wave propagation, but also is insensitive to time synchronization, and is a low-cost positioning method. Background technique [0002] The application prospect of indoor positioning technology in business, public safety, etc. is very broad. In commercial applications, the indoor positioning system can be used to track and locate people with special needs, children who are fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/14
Inventor 万群魏平陈慧文飞秦爽
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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