A multi-dimensional scale ambiguity-free ranging positioning method for measuring the time difference of arrival of a wave

CN121918059BActive Publication Date: 2026-05-29UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Filing Date
2026-03-26
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In environments with poor satellite positioning signal quality, multidimensional scaling ranging and positioning methods suffer from translation, rotation, and mirror ambiguity, making it difficult to accurately locate network node positions.

Method used

By measuring the time difference of radio signals arriving at the node in the environment, a matrix and vector for de-rotation and de-mirror blurring are constructed. A dual fitting error search mechanism is designed to eliminate the ambiguity of multi-dimensional scaling ranging and positioning, and positioning is achieved using radio signals.

Benefits of technology

In complex occlusion environments, autonomous localization of network nodes was achieved with small localization errors, significantly improving the localization accuracy of nodes.

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Abstract

The application provides a multi-dimensional scale ambiguity-free ranging positioning method for measuring the time difference of incoming waves, and belongs to the technical field of wireless positioning. The method utilizes radio signals in the environment, measures the time difference of the radio signals arriving at different nodes, constructs a matrix and a vector for removing rotation and mirror image ambiguity, converts nonlinear constraints into a solvable model, and designs a double fitting error search mechanism. Through rotation angle grid search, the minimum fitting errors of the original image and the mirror image are calculated and compared, the mirror image and the rotation ambiguity are determined and eliminated, and the node positioning result after removing the ambiguity is determined. The scheme of the application can effectively solve the absolute coordinates of the nodes without relying on satellite positioning, has small positioning error, significantly solves the self-positioning problem of the wireless sensor network nodes in a complex shielding environment, and improves the self-positioning level of the nodes in the complex environment.
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