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Improved bidirectional bilateral range-finding method

A distance measurement method and bilateral technology, applied in the direction of measuring devices, radio wave measurement systems, and using re-radiation, can solve the problems of long channel occupation time and long time consumption, and achieve high positioning accuracy, long time-consuming solution, and low power consumption Effect

Active Publication Date: 2018-11-16
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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[0029] Such as 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 a very short time interval T 1 Continuously transmit two broadcast signals (both ultra-wideband signals), namely signal 1 and signal 2, and 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 at which the four fixed reference nodes A, B, C, and D receive signals 1 and 2 is 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 fixed reference node B, ΔS AC is the difference between the distance from the mobile node Tag to the main fixed reference node A and the ...

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Abstract

The invention provides an improved bidirectional bilateral range-finding method. According to the method, a moving node continuously transmits signals to all fixed reference nodes twice, wherein one of the fixed reference nodes is a main fixed reference node, and the other fixed reference nodes are slave fixed reference nodes. The moving node transmits timing signals twice, and the main fixed reference node transmits a timing response signal once, thereby completing the measurement of the distance difference between the moving node and the main and slave fixed reference nodes. Meanwhile, the second timing signal transmitted by the moving node and the timing response signal transmitted by the main fixed reference node serve as the former two signals in the bidirectional bilateral range-finding. According to the invention, the method is high in positioning precision. Meanwhile, the method can achieve the measurement of a plurality of distance differences through two timing signals transmitted by the moving node, so the method can achieve the measurement of the distances from the moving node to all fixed reference nodes through one operation. The method is lower in power consumption,and solves a problem that multiple bidirectional bilateral range-finding consumes a lot of time.

Description

technical field [0001] The invention relates to the technical field of ultra-wideband wireless positioning, in particular to an improved two-way and bilateral ranging method. Background technique [0002] At present, high-precision real-time positioning systems mostly use the signal time-of-flight measurement method to achieve positioning. By measuring the signal time-of-flight to 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 to achieve positioning. Positioning methods based on signal time-of-flight measurement mainly include a TOF (Time Of Flight, TOF) positioning method that does not require time synchronization, and a 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 measured value of t...

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Application Information

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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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