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Method and device for improving positioning accuracy of wireless communication system by soft information

A wireless communication system and accuracy technology, applied in radio wave measurement systems, location-based services, positioning, etc., can solve the problems of high computational complexity and high complexity of the maximum similarity algorithm, affecting positioning accuracy, etc.

Inactive Publication Date: 2010-12-01
LINK TECH INC
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AI Technical Summary

Problems solved by technology

The disadvantage of the model-based algorithm is that it requires huge channel measurement data to establish an indoor wireless signal transmission model, and due to the high complexity of the indoor environment, it is not easy to establish an accurate wireless signal transmission model, which will affect the accuracy of positioning
In addition to the above pattern recognition algorithm and model algorithm, the indoor positioning system can also obtain the target position according to the maximum similarity (Maximum Likelihood) algorithm. big load
It can be seen from the above that the positioning accuracy provided by the existing algorithms is limited

Method used

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  • Method and device for improving positioning accuracy of wireless communication system by soft information
  • Method and device for improving positioning accuracy of wireless communication system by soft information
  • Method and device for improving positioning accuracy of wireless communication system by soft information

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Embodiment Construction

[0023] The concept of the present invention relates to the algorithm proposed in the paper "A Novel Indoor RSS-basedPosition Location Algorithm Using Factor Graph" published by the applicant in IEEE TRANSACTIONSON WIRELESS COMMUNICAITON in March 2009. Please refer to figure 2 , figure 2 It is a schematic diagram of the process 20 of the embodiment of the present invention. The process 20 is used in a positioning system to improve the problem of insufficient positioning accuracy of the existing Receive Signal Strength method. The process 20 assumes that the positioning system is set in an area, where there are base stations AP1-APN, and the base stations AP1-APN can detect the target device entering the area and send radio signals to the target device; at the same time, the positioning system can receive signals from the base stations AP1-APN. APN and received signal strength data of the target device. Process 20 includes the following steps:

[0024] Step 200: start.

[...

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Abstract

The invention discloses a method for improving positioning accuracy of a wireless communication system by soft information, comprising the followings steps: receiving a plurality of input data required by calculating the position of a target device; and generating a plurality of gauss probability density functions corresponding to a plurality of input data for calculating the position of the target device.

Description

technical field [0001] The present invention refers to a method and an electronic device for improving positioning accuracy in a wireless communication system, in particular to a method and an electronic device for improving positioning accuracy based on soft information in a wireless communication system. Background technique [0002] In wireless communication systems, positioning (Position Location) technology is widely used in emergency rescue systems, location-based billing services (Location-based Billing Service), nursing services for the elderly and patients, and personnel positioning in firefighting or field service etc. to obtain the position of the target. Time of Arrival (or Time of Arrival, TOA), Angle of Arrival (AOA) and Received Signal Strength (RSS) are common positioning techniques. The method multiplies the propagation time of the received signal measured by the three base stations by the propagation speed to obtain the distance between the base station an...

Claims

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Application Information

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IPC IPC(8): H04W4/02G01S5/02
Inventor 吴承轩黄金增杜勇赐陈俊才
Owner LINK TECH INC
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