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Wireless range-finding method based on probability fingerprint calculation

A technology of wireless distance measurement and fingerprint, applied in the field of wireless distance measurement

Inactive Publication Date: 2015-04-08
HANGZHOU UTEAMTEC
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a wireless ranging method based on probabilistic fingerprint calculation, which solves the defects in the estimation of distance and direction in existing triangulation positioning

Method used

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Embodiment Construction

[0025] A method for wireless ranging based on probabilistic fingerprint calculation, comprising the following steps in sequence:

[0026] 1) The communication scene is determined by the installation location of the signal source, building structure, flow of people, and type of receiving equipment;

[0027] 2) According to the signal source in step 1) as the origin and the receiving device as the end point, select the position to be measured. According to the dimensions of ranging and positioning, the position of the receiving device is determined by D, Theta, and Phi, where D represents the signal source and The linear distance of the receiving device, Theta and Phi represent the rotation angle of the receiving device in two normal planes relative to a certain direction;

[0028] 3) Measure one or more sets of RSSI data at the given positions of D, Theta, and Phi according to step 2), and obtain the mapping function RSSI=F(D, Ang), where Ang is the positioning dimension. The ...

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Abstract

The invention relates to a wireless range-finding method based on probability fingerprint calculation, and the method sequentially comprises the following steps: determining a communication scene and the range-finding and positioning dimension, measuring one or more groups of RSSI data, and obtaining a mapping function RSSI = (D, Ang). The method is advantageous in that the communication scene is determined according to a signal source installation position, a building structure, a visitor flow rate, and the type of receiving equipment; one or more groups of RSSI data are measured through the position of the receiving equipment, and the mapping function RSSI = (D, Ang) is obtained; a measured distance mapping fingerprint database is divided based on the scene is far higher than a conventional analytical model or an omnibearing fingerprint database model in accuracy; a random part of a signal can effectively resist interference from a human body and the surroundings, and assists provide a distance estimate reference, more accurate in all directions, for a triangulation location algorithm; the method achieves distance measurement with different precisions in regions of the signal source at different intervals; and the method can be used for the distance measurement based on a wireless signal transmitting device, and also can be used for the distance and direction estimation in triangulation location.

Description

technical field [0001] The invention relates to a wireless ranging method based on probability fingerprint calculation. Background technique [0002] The use of wireless signal strength information (RSSI) for distance and position estimation is a low-cost, high-reliability positioning solution widely used in personal consumption, industrial applications, industry applications and other fields. Among them, positioning based on triangulation positioning technology The system has the advantages of easy implementation, low maintenance, and simple calculation. The key to the implementation of triangulation positioning is that the positioning system needs to obtain a reliable and stable distance estimation between the positioning device and the wireless signal source. However, due to the design defects of the communication protocol itself, such as Bluetooth 4.0 with low energy consumption is different from the design of wireless devices. There is often a certain randomness in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/00
CPCG01S5/0278
Inventor 柳凌峰
Owner HANGZHOU UTEAMTEC
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