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Positioning method based on channel pulse response autocorrelation sequence

A technology of channel impulse response and positioning method, which is applied in positioning, measuring devices, instruments, etc., and can solve the problem of low positioning accuracy

Inactive Publication Date: 2011-11-23
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

However, since this method only uses the amplitude information in the frequency domain of the channel, the amount of information involve

Method used

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  • Positioning method based on channel pulse response autocorrelation sequence
  • Positioning method based on channel pulse response autocorrelation sequence
  • Positioning method based on channel pulse response autocorrelation sequence

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Embodiment Construction

[0031] Taking the two-dimensional positioning of an indoor management target with a length of 7 meters and a width of 6 meters as an example, four signal receivers p 1 ,p 2 ,p 3 ,p 4 Set at the points whose coordinates are equal to (0.25, 0.25), (0.25, 5.75), (6.75, 5.75) and (6.75, 0.25), the units are meters (m); and in the whole room at intervals of 0.5 × 0.5 meters Set sampling points, a total of 143 nodes;

[0032] A. Establish a positioning database: use the ZigBee positioning development system (product specification C51RF-CC2431-ZDK) produced by Chengdu Wireless Dragon Communication Technology Co., Ltd. to establish a database; that is, place it on the node coordinates (0.5, 0.5) of the positioning grid A transmit signal is:

[0033] v ( t ) = 1 A d ( t )

[0034] The library building signal sourc...

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Abstract

The invention, which belongs to the indoor positioning technology, disclosed a method for positioning a non-cooperative target by using channel pulse response autocorrelation sequence. The method comprises the following steps: establishing a location database; arranging positioning chips on each management object and storing each management object information parameter in the database; determining the positions of the management objects and displaying the current positions of all the management objects on a visual interface. In the invention, the channel pulse response autocorrelation sequence is used as a signal for establishing the database. After a receiver receives the signal, autocorrelation processing is performed respectively. And the processed signal and preset node position parameters which are relative to each signal receiver are used to establish the positioning database. In the method, more discrete time domain information is used, positioning information is abundant and positioning accuracy can be further raised. Compared to the background technology, the positioning accuracy by using the method of the invention can be raised more than 10%. Sensitivity to position differences in positioning areas and the positioning accuracy can be effectively raised. Requirements, such as time synchronism and the like, can be reduced.

Description

technical field [0001] The invention belongs to an indoor positioning technology, which is a method for positioning a target (non-cooperative target) with an unknown wireless signal waveform based on a channel impulse response autocorrelation sequence. The invention establishes a positioning database by using the impulse response autocorrelation sequence of the known wireless signal propagation channel, and uses the identification system to locate one or more targets with unknown wireless signal waveforms (position measurement). This method utilizes more time-domain information, thus improving positioning accuracy. Background technique [0002] The application prospect of indoor positioning technology in medical health, social security, public service and commercial operation is very broad. With the increasing demand for indoor wireless positioning, such as robot positioning, environmental monitoring, medical monitoring, construction and many other fields, indoor wireless p...

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Application Information

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IPC IPC(8): G01S5/14
Inventor 万群郭贤生秦爽陈慧黄际彦樊荣
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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