A TDOA positioning method based on a single base station of multiple long feeder line antennas

By deploying a TDOA positioning method with multiple long feeder antennas and a single base station in a spherical coordinate system, the time synchronization and base station deployment problems of UWB positioning technology are solved, high-precision indoor positioning is achieved, and system complexity and cost are reduced.

CN119815510BActive Publication Date: 2025-10-17NANJING UNIV OF POSTS & TELECOMM
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Patent Information

Application Number
CN202510033058.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-09
Publication Date
2025-10-17
Estimated Expiration
2045-01-09

AI Technical Summary

Technical Problem

Existing UWB positioning technology has time synchronization problems and network burden in indoor positioning. The traditional TDOA method is limited to the rectangular coordinate system, and the base station deployment is affected by the geographical environment, making it difficult to achieve high precision and wide application.

Method used

The TDOA positioning method of a single base station with multiple long feeder antennas is adopted. Using the spherical coordinate system model, the base station is deployed with six long feeder antennas extending outward from the base station as the center. Every two antennas form an antenna pair. The position of the target node is calculated through the ranging signal, avoiding the synchronization of base stations and reducing system complexity.

Benefits of technology

It achieves high-precision positioning in complex environments, breaks through the limitations of the rectangular coordinate system, reduces system complexity and cost, and improves the flexibility and accuracy of the positioning model.

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Abstract

The application relates to the technical field of wireless communication, in particular to a TDOA positioning method based on a multi-long-feed-line antenna single base station, which comprises the following steps: deploying a base station, leading six long-feed-line antennas from the base station as the center, two opposite antennas of the six antennas of the base station pass through the center to form a group, and three groups of antenna pairs are formed, the angle of each group of antenna pairs can be changed according to needs, and the length of each antenna can be changed according to needs; a target node to be measured transmits a ranging signal, the distance difference of the target node to the two ends of the base station antenna pair is obtained, and the target node to be measured is located in a space constrained by a constraint condition; according to the geometric relationship of a spherical coordinate system model, the distance difference of the target node to the two ends of the base station antenna pair is analyzed; according to three distance difference formulas, and by excluding the solution with an imaginary part, a unique solution is obtained, and the limitation of the rectangular coordinate axis is broken through, so that the deployment of the base station in a real scene is facilitated.
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