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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: 2021-09-24
WUHAN UNIV
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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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  • Positioning method and system based on signal quality control and feature fingerprint enhancement
  • Positioning method and system based on signal quality control and feature fingerprint enhancement
  • Positioning method and system based on signal quality control and feature fingerprint enhancement

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Embodiment Construction

[0067] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0068] A positioning method based on signal quality control and characteristic fingerprint enhancement provided by the present invention can obtain its technical effects through experiments:

[0069] (1) Improve positioning accuracy:

[0070] [Innovation 1] The feature extraction method based on signal quality control, through SNR-based signal quality evaluation, signal denoising based on 3-Sigma and Hampel filter algorithm, extracts stable and reliable time-domain and frequency-domain feature signals, and solves the problem of the original signal The problem of low positioning accuracy caused by large fluctuations.

[0071] [Innovation 2] The fingerprint establishment method based on the combination of time domain and frequency domain features, combined with time domain multipath information and frequency domain CSI informa...

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Abstract

The invention provides a positioning method and system based on signal quality control and feature fingerprint enhancement, and the method comprises the steps: carrying out the feature extraction based on signal quality control: carrying out the quality control from a signal level, and extracting frequency domain CSI information and time domain PDP information; establishing fingerprints based on time domain and frequency domain combined features, including combining frequency domain CSI information and time domain PDP information, and constructing a multi-dimensional feature offline position fingerprint database; carrying out robust fingerprint positioning based on distance measurement enhancement, comprising the steps of constructing online test position fingerprint information by adopting the same combined feature mode, calculating a fingerprint positioning result by utilizing a multi-dimensional feature offline position fingerprint database, constraining the fingerprint positioning result by using a first path energy distance measurement result, and finally obtaining a robust fingerprint positioning result. According to the positioning technology solution provided by the invention, the accuracy and the stability of an indoor positioning result are improved.

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 characteristic fingerprint enhancement. Background technique [0002] With the advancement of science and technology and the development of economy, indoor positioning technology has received more and more attention. Indoor positioning technology is one of the core technologies for the Internet of Everything, artificial intelligence and future superintelligence (robot + human) applications. Health, virtual reality games, 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 serious 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 locatio...

Claims

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Application Information

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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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