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
CN108459300BActive Publication Date: 2021-03-30SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2021-03-30

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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.
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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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