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Asynchronous ultra wide band positioning method and system based on two-way distance measurement

A technology of two-way ranging and positioning method, applied in radio wave measurement systems, positioning, measuring devices, etc., can solve the problem of high system complexity, achieve the effect of improving efficiency and reducing positioning complexity

Active Publication Date: 2013-05-29
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

[0005] In order to solve the problem of high system complexity in the prior art two-way ranging, the present invention provides an asynchronous ultra-wideband positioning method based on two-way ranging

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  • Asynchronous ultra wide band positioning method and system based on two-way distance measurement
  • Asynchronous ultra wide band positioning method and system based on two-way distance measurement
  • Asynchronous ultra wide band positioning method and system based on two-way distance measurement

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Embodiment Construction

[0030] Such as figure 1 As shown, the present invention discloses an asynchronous ultra-wideband positioning method based on two-way ranging, including the step of measuring the distance between the target node unit and the anchor node unit, and the step of measuring the distance between the target node unit and the anchor node unit includes steps S1 to S5, In step S1, the target node unit sends two pulses with different cycles. In step S2, at least three anchor node units jointly search for the pulse sent by the target node unit, and the search periods of the at least three anchor node units are different. In step S3, each anchor node unit captures the pulse twice, and judges whether it captures the pulse sent by the target node unit at the same time each time, if so, proves that the anchor node unit has successfully captured the pulse, then executes step S4 , otherwise the anchor unit ends detection. In step S4, the anchor node unit that successfully captures the pulse ret...

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Abstract

The invention provides an asynchronous ultra wide band positioning method and an asynchronous ultra wide band positioning system based on two-way distance measurement. The invention has the advantages that distance between a target node unit and an anchor node unit is obtained in the step of measuring the distance between the target node unit and the anchor node unit, and then the target node unit is positioned; and by changing a repetition period of a transmission pulse, the anchor node unit and the target node unit can be conveniently identified, positioning complexity is reduced, and efficiency is improved.

Description

technical field [0001] The invention relates to a wireless positioning method, in particular to an asynchronous ultra-wideband positioning method and system based on two-way ranging. Background technique [0002] Due to its extremely high time-domain resolution, ultra-wideband signals can theoretically achieve centimeter-level ranging and positioning accuracy. At the same time, because of its rich frequency domain information components and good obstacle penetration capabilities, it has great potential in the field of indoor positioning. Wide range of applications. Common positioning methods include time of arrival (TOA), angle of arrival (AOA), time difference of arrival (TDOA), and signal strength (RSS). The advantages of domain resolution, thus widely used. [0003] Compared with TOA and TDOA methods, both have their own advantages. Among them, the TDOA system can accommodate more users, but requires accurate time synchronization between anchor node units. Due to the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
Inventor 张霆廷张钦宇陈方晓张红邹洪良田旋旋李伟杰
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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