An Improved Two-way Bilateral Ranging Method

A distance measurement method and bilateral technology, applied in the direction of measuring devices, radio wave measurement systems, instruments, etc., can solve the problems of long time consumption and long channel occupation time, and achieve the effect of low power consumption and high positioning accuracy

Active Publication Date: 2022-06-21
HEBEI UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide an improved two-way bilateral ranging method, which can solve the problem of long channel occupation and time-consuming caused by multiple two-way bilateral ranging in the prior art

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Embodiment Construction

[0029] like figure 1 As shown, Tag is a mobile node, A, B, C, and D are fixed reference nodes, and A is a master fixed reference node, and B, C, and D are slave fixed reference nodes. Mobile node Tag at short time interval T 1 Two consecutive broadcast signals (both ultra-wideband signals) are transmitted, which are signal 1 and signal 2, respectively. The four fixed reference nodes A, B, C, and D can all receive signal 1 and signal 2. Because the distances from the mobile node Tag to the four fixed reference nodes A, B, C, and D are not equal, the time when the four fixed reference nodes A, B, C, and D receive signal 1 and signal 2 are also different. The difference is (C is the speed of light, ΔS AB is the difference between the distance from the mobile node Tag to the main fixed reference node A and the distance from the mobile node Tag to the slave fixed reference node B, ΔS AC is the difference between the distance from the mobile node Tag to the main fixed referen...

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Abstract

The invention provides an improved bidirectional and bilateral ranging method. In this method, the mobile node continuously transmits two signals to all fixed reference nodes. Among these fixed reference nodes, one is the master fixed reference node, and the rest are slave fixed reference nodes. The mobile node transmits the time synchronization signal twice, and the main fixed reference node sends a time synchronization response signal to complete the measurement of the distance difference between the mobile node and the main and slave fixed reference nodes. At the same time, the second time synchronization signal sent by the mobile node and the main fixed reference node The time response signal sent by the reference node is used as the first two frame signals in the two-way bilateral ranging. The method in the present invention has the advantage of high positioning accuracy of the two-way bilateral ranging method; at the same time, multiple distance differences can be measured only by transmitting the time synchronization signal twice through the mobile node, and then can be measured at one time to obtain the distance between the mobile node and each distance. The distance of the reference node is fixed, and the power consumption is relatively low, which solves the problem of long time-consuming two-way and bilateral ranging.

Description

technical field [0001] The invention relates to the technical field of ultra-wideband wireless positioning, in particular to an improved two-way bilateral ranging method. Background technique [0002] At present, high-precision real-time positioning systems mostly use the signal flight time measurement method to achieve positioning, and determine the distance between the mobile node and the fixed base station or the distance difference between the mobile node and two fixed base stations by measuring the signal flight time to achieve positioning. The positioning methods based on signal time-of-flight measurement mainly include the TOF (Time Of Flight, TOF) positioning method that does not require time synchronization, and the TDOA (Time Difference of Arrival, TDOA) positioning method that requires time synchronization. TOF positioning is to measure the signal propagation time between three (or more) reference nodes and the mobile node, so as to obtain the measurement value of...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S11/02G01S5/04
CPCG01S5/04G01S11/026
Inventor 韦子辉方立德陈雪
Owner HEBEI UNIVERSITY
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