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A positioning method and system based on signal quality control and feature fingerprint enhancement

A technology of signal quality and characteristic fingerprints, applied in the transmission system, transmission monitoring, wireless communication, etc., can solve problems such as difficult to guarantee system accuracy and stability

Active Publication Date: 2022-08-05
WUHAN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] In summary, the existing indoor positioning system is affected by the indoor environment, crowd activities and the number of base stations, it is difficult to guarantee the accuracy and stability of the system, and provide users with stable high-precision location services

Method used

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  • A positioning method and system based on signal quality control and feature fingerprint enhancement
  • A positioning method and system based on signal quality control and feature fingerprint enhancement
  • A positioning method and system based on signal quality control and feature fingerprint enhancement

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Embodiment Construction

[0067] The technical solutions of the present invention will be specifically described below with reference to the accompanying drawings and embodiments.

[0068] The present invention provides a positioning method based on signal quality control and feature fingerprint enhancement, and its technical effects can be obtained through experiments:

[0069] (1) Improved positioning accuracy:

[0070] [Innovative point 1] The feature extraction method based on signal quality control, through the signal quality assessment based on SNR, and the signal denoising based on 3-Sigma and Hampel filtering algorithm, extract stable and reliable time domain and frequency domain feature signals, and solve the problem of the original signal. The problem of low positioning accuracy caused by large fluctuations.

[0071] [Innovative point 2] The fingerprint establishment method based on the combination of time domain and frequency domain features, combining time domain multipath information and ...

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Abstract

The present invention provides a positioning method and system based on signal quality control and feature fingerprint enhancement. The fingerprint establishment of the joint feature of the frequency domain and the frequency domain, including the joint frequency domain CSI information and the time domain PDP information, to construct a multi-dimensional feature offline location fingerprint library; Robust fingerprint positioning based on ranging enhancement, including the use of the same joint feature method to construct an online test location. Fingerprint information, use the multi-dimensional feature offline location fingerprint database to calculate the fingerprint location result, use the first path energy ranging result to constrain the fingerprint location result, and finally obtain a robust fingerprint location result. The positioning technology solution proposed by the present invention improves the accuracy and stability of indoor positioning results.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a positioning method and system based on signal quality control and feature fingerprint enhancement. Background technique [0002] With the advancement of science and technology and the development of economy, indoor positioning technology has been paid more and more attention. Indoor positioning technology is one of the core technologies for the Internet of Everything, artificial intelligence and future super-intelligence (robot + human) applications. Health, virtual reality gaming, and human social interaction play a huge role. [0003] In an indoor environment, GNSS (Global Navigation Satellite System) signals cannot be effectively received and used due to severe multipath phenomena, providing location services for users. Existing indoor positioning technologies mostly use various signals of opportunity or multi-source sensor information to obtain the location inf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04B17/309
CPCH04W64/00H04B17/309
Inventor 陈亮阮焱林刘钊良周鑫陈锐志
Owner WUHAN UNIV
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