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A method and system for indoor wireless positioning

A positioning method, indoor wireless technology, applied in the direction of radio wave measurement system, positioning, instruments, etc., can solve the problems of non-line-of-sight error, multipath interference, large error, etc., and achieve the effect of improving positioning accuracy

Active Publication Date: 2021-03-30
SHANDONG UNIV
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AI Technical Summary

Problems solved by technology

Since the path loss coefficient used for positioning calculation varies with the quality of the environmental channel, the single radio frequency active indoor positioning system is susceptible to factors such as multipath interference, non-line-of-sight errors, and shadow fading, and the positioning is not accurate enough due to large errors
[0003] To sum up, in the prior art, there is still no effective solution to the problem that the path loss coefficient used for positioning calculation varies due to the quality of the environmental channel

Method used

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  • A method and system for indoor wireless positioning
  • A method and system for indoor wireless positioning
  • A method and system for indoor wireless positioning

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[0053]It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0054] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0055] As introduced in the background technology, due to the inevitable occlusion problem in the prior art, ther...

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Abstract

The invention discloses an indoor wireless positioning method and system. The method is characterized by arranging a plurality of fixed anchor nodes indoor, and arranging a mobile node on a target tobe positioned, wherein the mobile node is used for sending a radio-frequency positioning signal to the anchor nodes; obtaining radio frequency signal intensity RSSI received by each anchor node, and carrying out filtering processing on the RSSI; according to the radio frequency signal intensity RSSI obtained after filtering processing, calculating distance value between the mobile node and each anchor node, and comparing the distance values with infrared communication distance and rejecting the distance values, which are not within the infrared communication distance range; according to the distance value between the mobile node and each anchor node and the position of each anchor node, calculating the position of the mobile node within a certain time, and drawing a moving path of the mobile node; according to the moving path of the mobile node, calculating speed [delta]s of the mobile node and correcting the RSSI by utilizing the [delta]s; and calculating the distance between the mobile node and each anchor node by utilizing the corrected RSSI, and based on the calculated distance, determining the position of the mobile node.

Description

technical field [0001] The invention relates to the field of indoor positioning, in particular to an indoor wireless positioning method and system. Background technique [0002] The existing indoor positioning adopts a single radio frequency active indoor positioning system, which arranges gateway nodes and beacon nodes indoors, and arranges mobile nodes in the moving target so that the mobile node moves synchronously with the moving target; the mobile node will receive the known signal The information of the target node is uploaded to the gateway through the short-distance radio frequency communication network, and then the gateway delivers the upper computer to calculate the position of the mobile node through the mobile adaptive positioning algorithm based on TDOA positioning, and complete the preliminary positioning; realize the matching correction of the preliminary positioning and The corrected positioning coordinates are stored in the spatial database; and the positio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/14G01S5/02
CPCG01S5/021G01S5/14
Inventor 杜晓通邢增宇孙鸿昌
Owner SHANDONG UNIV
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