A UWB high-precision positioning method and system

By acquiring the one-way radio electromagnetic wave transmission time difference and antenna delay compensation curve, and combining the least squares method to calculate the tag position, the problem of antenna delay error in UWB positioning was solved, and high-precision UWB positioning was achieved.

CN115604649BActive Publication Date: 2026-05-01NR ELECTRIC CO LTD +1
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Patent Information

Application Number
CN202110719013.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-06-28
Publication Date
2026-05-01
Estimated Expiration
2041-10-14

AI Technical Summary

Technical Problem

Existing UWB positioning technology suffers from large system errors, especially antenna delay errors, resulting in low positioning accuracy. High-precision positioning is particularly difficult to achieve in TOA and TDOA algorithms.

Method used

By obtaining the one-way radio electromagnetic wave transmission time difference and antenna delay compensation curve, the tag position is calculated using the least squares method. The TOA algorithm is used to perform multiple message exchanges to reduce system errors, accurately measure the distance, and fit the antenna delay error.

Benefits of technology

This improved the ranging accuracy between the base station and the tag, reduced system errors, and ultimately improved the accuracy of tag positioning.

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Abstract

The application discloses a UWB high-precision positioning method and system, comprising the following steps: obtaining the one-way radio electromagnetic wave transmission time difference obtained by communication between each base station and a tag in a current single ranging stage, the coordinate information of each base station and the antenna delay compensation curve obtained by pre-solution communication between each base station and the tag; calculating the distance between each base station and the tag according to the obtained data; and determining the real-time position coordinates of the tag according to the calculated distance between each base station and the tag. Advantages: the ranging source data precision between the base station and the tag is improved, and finally the UWB positioning precision is improved.
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