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User identity identification method based on Wi-Fi signal

A user identification and signal technology, applied in the field of human identification, can solve problems such as not being widely deployed

Inactive Publication Date: 2017-02-22
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, cameras require good lighting conditions and involve privacy issues. Low-cost 60GHz radars can only provide a detection range of more than ten centimeters and are not widely deployed in daily life. Wearable devices require users to actively wear relevant sensors.

Method used

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  • User identity identification method based on Wi-Fi signal
  • User identity identification method based on Wi-Fi signal
  • User identity identification method based on Wi-Fi signal

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Embodiment Construction

[0024] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] Some technical terms among the present invention are referred to as follows:

[0026] abbreviation English full name Chinese meaning CSI Channel State Information channel state information PCA Principal Component Analysis principal component analysis LOS line-of-sight line of sight MAD Mean Absolute Difference mean absolute deviation DTW Dynamic Time Warping Dynamic Time Planning KNN k-Nearest Neighbor K nearest neighbor

[0027] The invention provides a non-contact and non-aggression identification method based on Wi-Fi signals in an indoor environment. The rationale is that each person's body shape and walking habits are different, which will have a unique impact on Wi-Fi signal transmission, which in turn will produce a specific pattern in the CSI time series. ...

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Abstract

The invention provides a user identity identification method based on a Wi-Fi signal. A Wi-Fi transmitter, a signal receiver and a terminal device are comprised. The method is characterized in that the method comprises the steps that the Wi-Fi transmitter transmits the Wi-Fi signal; the signal receiver receives the Wi-Fi signal to acquire channel state information; the channel state information changes when a human body passes; and the terminal device carries out denoising processing on the channel state information data, extracts the shape feature of a line-of-sight waveform, and carries out classifying by matching and comparing the shape feature of a line-of-sight waveform to acquire an identification result. The method based on the Wi-Fi signal has the advantages of device independence, privacy protection, intrusion prevention and the like compared with existing methods of using cameras, radars and wearable devices.

Description

technical field [0001] The invention relates to the field of human body identification, in particular to a human body identification method based on analysis and processing of WiFi channel state information signals. Background technique [0002] Biometric-based identification technology plays an important role in the field of human-computer interaction, which is generally based on several physiological or behavioral characteristics. Physiological characteristics are related to the shape of various parts of the human body, such as fingerprints, irises, and palm prints. In order to achieve a higher accuracy rate, the recognition method based on physiological characteristics generally requires the user to approach or even touch the corresponding sensor. Behavioral characteristics are related to people's behavior habits, such as the rhythm of typing on the keyboard, gait, voice, etc. At present, identity recognition based on behavioral characteristics mainly focuses on gait ch...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06F2218/10G06F2218/12
Inventor 郭斌辛通王柱於志文周兴社李明阳
Owner NORTHWESTERN POLYTECHNICAL UNIV
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