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Building positioning method based on UWB (ultra-wideband) technology

A positioning method and technology, which is applied in the field of RFID and UWB, can solve the problems of a large number, high cost, ultrasonic multipath effect and non-line-of-sight propagation, and achieve strong penetration, low power consumption, anti-multiple good diameter effect

Inactive Publication Date: 2012-09-12
SHANGHAI SHUWEI ELECTRONICS
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Problems solved by technology

The overall positioning accuracy of ultrasonic positioning is high, and the structure is simple, but ultrasonic is greatly affected by multipath effects and non-line-of-sight propagation, and requires a large amount of investment in underlying hardware facilities, and the cost is too high

Method used

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  • Building positioning method based on UWB (ultra-wideband) technology
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  • Building positioning method based on UWB (ultra-wideband) technology

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Embodiment Construction

[0023] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0024] The inventive method mainly comprises two major parts;

[0025] (1) TOA distance estimation;

[0026] For a single-path additive white noise (Additive White Gaussian Noise, AwGN) channel condition, the root mean square error can be estimated using the distance of TOA ranging:

[0027] var ( d ^ ) ≥ c 2 2 π R SNR β

[0028] Among them, c is the speed of light, R SNR is the signal-to-noise ratio, and β is the effective bandwidth ...

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Abstract

The invention discloses a building positioning method based on UWB (ultra-wideband) technology. The method includes TOA (time of arrival) distance estimate and weight selection by fuzzy logic, namely obtaining arrival time of a direct signal by weighting time of a first arrived signal and time of a strongest signal and calculating a weighting coefficient according to the fuzzy logic technology. Actual data indicates that positioning precision is highly enhanced by the method. Compared with traditional narrow bandwidth positioning system, the method has the advantages of high penetrating power, low power consumption, fine anti-multipath effect, high safety, low system complexity, high positioning precision and the like.

Description

Technical field: [0001] The invention relates to the technical fields of RFID and UWB (Ultra-Wideband, ultra-wideband), in particular to a building positioning method based on UWB technology. Background technique: [0002] At present, the following schemes are usually adopted for personnel positioning in China: [0003] 1. Infrared indoor positioning technology. The principle of infrared indoor positioning technology positioning is that infrared IR signs emit modulated infrared rays, which are received by optical sensors installed indoors for positioning. Although infrared rays have relatively high indoor positioning accuracy, infrared rays can only travel at a line-of-sight distance because light rays cannot pass through obstacles. The two main disadvantages of line-of-sight and short transmission distance make the indoor positioning effect very poor. When the logo is placed in the pocket or has walls or other occlusions, it cannot work normally. It is necessary to insta...

Claims

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Application Information

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IPC IPC(8): G01S11/02
Inventor 尹启刚孙亚洲
Owner SHANGHAI SHUWEI ELECTRONICS
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