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A Systematic Error Estimation Method of Base Station Based on tdoa Model

A system error and base station technology, applied in the field of system error estimation of base stations, can solve problems such as system errors, base station hardware consistency defects, and reduce tag positioning performance, and achieve the effect of performance improvement and easy deployment and installation

Active Publication Date: 2020-09-25
NANJING WOXU COMM TECH
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AI Technical Summary

Problems solved by technology

[0004] At present, there are certain errors in the installation and position measurement process of UWB base stations, and there are certain defects in the consistency of base station hardware, which may cause certain systematic errors in the positioning process of UWB base stations. When the system error exceeds a certain limit, it will be significantly reduced. Positioning performance of labels

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  • A Systematic Error Estimation Method of Base Station Based on tdoa Model
  • A Systematic Error Estimation Method of Base Station Based on tdoa Model
  • A Systematic Error Estimation Method of Base Station Based on tdoa Model

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Embodiment Construction

[0035] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0036] combine figure 1 , the present invention proposes a system error estimation method for a base station based on a TDoA model, wherein the base station based on the TDoA model includes at least one UWB base station; the UWB base station receives a UWB data message containing time stamp information sent by a UWB reference tag , the UWB base station and the background computer communicate through Ethernet, and send the received UWB data message to the background computer; the TDoA value calculation module is installed in the background computer, which is used to calculate the received UWB data message according to the received UWB data message. The measured TDoA value of the UWB reference tag described above.

[0037] The system error estimation method comprises the following steps:

[0038]S1...

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Abstract

The invention discloses a system error estimation method of a base station based on a TDoA model. The method comprises the steps of selecting a public base station; obtaining a measurement TDoA valuebetween the UWB reference label and the UWB base station through a TDOA positioning process; calculating and obtaining a theoretical TDoA value between the UWB reference label and the UWB base stationaccording to the actual position coordinates; and comparing and analyzing the measured TDoA value and the theoretical TDoA value, calculating and obtaining the system error of the UWB base station, and correcting the TDoA positioning solution of the UWB base station by using the estimated system error so as to improve the overall positioning performance of the UWB base station.

Description

technical field [0001] The present invention relates to the technical field of indoor positioning, in particular to a system error estimation method of a base station based on a TDoA model. Background technique [0002] UWB wireless positioning technology is widely used in key regulatory fields such as pipe corridors, medical care, and chemical industry. At the same time, with the research, promotion and application of Industry 4.0, indoor wireless positioning has become more and more known and recognized by more industries. Due to its high precision and low power consumption, UWB positioning technology has broad prospects and a good development momentum. [0003] TDOA positioning is a positioning method using time difference. By measuring the time it takes for the signal to reach the base station, the distance to the tag can be determined. The position of the tag can be determined by using the distance from the tag to each base station (with the base station as the cente...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/029H04W4/33G01S5/02G01S5/14
CPCG01S5/021G01S5/145H04W4/029H04W4/33
Inventor 朱光华林权威房宏
Owner NANJING WOXU COMM TECH