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Method and system for performing ultra-wide band asynchronous positioning under nonideal conditions

A positioning method and positioning system technology, which are applied in positioning, radio wave measurement systems, instruments, etc., can solve the problem of high system complexity, and achieve the effect of improving efficiency and reducing positioning complexity.

Active Publication Date: 2013-02-13
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 two-way ranging of the prior art, the present invention provides an ultra-wideband asynchronous positioning method under non-ideal conditions

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  • Method and system for performing ultra-wide band asynchronous positioning under nonideal conditions
  • Method and system for performing ultra-wide band asynchronous positioning under nonideal conditions
  • Method and system for performing ultra-wide band asynchronous positioning under nonideal conditions

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Embodiment Construction

[0036] Such as figure 1 As shown, the present invention discloses an ultra-wideband asynchronous positioning method under non-ideal conditions, 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 multiple pulses with different periods, and the multiple pulses are greater than 2 pulses. 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 N times, and judges whether the probability of capturing the pulse sent by the target node unit for n times at the same time is greater than P', if so, it proves that the anchor node unit successfully captures the pulse, then Execute step S4, otherwise the anchor...

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Abstract

The invention provides a method and a system for performing ultra-wide band asynchronous positioning under nonideal conditions. The method and the system have the advantages that the distance between a target node unit and anchor node units is obtained by a step of measuring the distance between the target node unit and the anchor node units; then the target node unit is positioned; and by changing the repetition period of transmitted pulse, the anchor node units and the target node unit can be identified conveniently, the positioning complexity is reduced and efficiency is improved.

Description

technical field [0001] The invention relates to a wireless positioning method, in particular to an ultra-wideband asynchronous positioning method and system under non-ideal conditions. 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 th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/00
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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