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High-precision indoor positioning method based on multi-source data fusion

An indoor positioning and multi-source data technology, applied in the field of communication, can solve problems such as loss of function, impenetrable satellite signals, low positioning accuracy of mobile base stations, etc., and achieve the effect of reducing uncertainty

Pending Publication Date: 2021-06-04
HOHAI UNIV
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Problems solved by technology

[0003] But for the indoor environment, on the one hand, the satellite signal cannot penetrate the building and lose its effect; on the other hand, the positioning accuracy of the mobile base station is too low to meet the indoor accuracy requirements, coupled with the inevitable multipath effect and people walking interference, so how to reduce the error caused by these interferences has become the focus of industry research

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  • High-precision indoor positioning method based on multi-source data fusion
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  • High-precision indoor positioning method based on multi-source data fusion

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Embodiment Construction

[0017] figure 1 It is a flow chart of the high-precision indoor positioning method based on multi-source data fusion of the present invention. Such as figure 1 As shown, the high-precision indoor positioning method based on multi-source data fusion of the present invention includes:

[0018] First, perform antenna delay correction on the positioning base station; this can ensure that the frequency difference of its crystal oscillator can meet the needs of the project.

[0019] Then use the UWB positioning and ranging data receiving device to collect TOF message data, and perform related analysis to separate the information with reference value.

[0020] Then, through channel estimation, the collected ranging data is used for NLOS feature recognition, the NLOS ranging data is separated, and the separated NLOS data is reconstructed by the EKF algorithm.

[0021] Finally, the processed TOF ranging data and signal strength are fused to obtain the first-level fusion data, and th...

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Abstract

The invention relates to a high-precision indoor positioning method based on multi-source data fusion. The method comprises the following steps of: performing antenna delay correction on a positioning base station, collecting TOF (Time of Flight) message data by using UWB (Ultra Wideband) positioning and ranging data receiving equipment, performing related analysis, and separating information with a reference value; carrying out NLOS feature recognition on the collected ranging data through channel estimation, separating out NLOS ranging data, and carrying out reconstruction processing on the separated NLOS data through an EKF algorithm; and fusing the processed TOF ranging data with the signal intensity to obtain first-level fusion data, and calculating optimal matching coordinate information through a corresponding data fusion rule and second-level fusion data obtained through the estimator 2.

Description

technical field [0001] The present invention relates to the communication field, in particular to a high-precision indoor positioning method based on multi-source data fusion. Background technique [0002] Indoor positioning is a promising research direction, which has the characteristics of small area, serious multipath propagation, and easy to change positioning environment. For the outdoor environment, there are currently satellite positioning (GPS, Galileo, Beidou and other systems) or mobile base station positioning. [0003] But for the indoor environment, on the one hand, the satellite signal cannot penetrate the building and lose its effect; on the other hand, the positioning accuracy of the mobile base station is too low to meet the indoor accuracy requirements, coupled with the inevitable multipath effect and people walking interference, so how to reduce the errors caused by these interferences has become the focus of research in the industry. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/02H04W4/33H04W4/021H04W64/00
CPCH04W4/021H04W4/023H04W64/006H04W4/33
Inventor 李卓群李东新
Owner HOHAI UNIV
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