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Unsupervised human detecting and positioning method

A technology of human body detection and positioning method, applied in the field of unsupervised human body detection and positioning, can solve the problems of limiting the application scope of the system, a single communication link, increasing the system deployment overhead, etc., to achieve the effect of reducing deployment overhead and flexible scalability

Inactive Publication Date: 2015-01-07
HARBIN ENG UNIV
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AI Technical Summary

Problems solved by technology

The deployment of a large number of devices limits the application range of the system to a certain extent. For example, in the home environment, there are usually only a small number or even a single communication link
Similarly, a large number of on-site fingerprint collection work will undoubtedly increase the system deployment overhead

Method used

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  • Unsupervised human detecting and positioning method
  • Unsupervised human detecting and positioning method
  • Unsupervised human detecting and positioning method

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Experimental program
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Embodiment Construction

[0030] Such as figure 1 As shown, the unsupervised human body detection and positioning method of the present invention comprises the following steps:

[0031] In step 101, the channel state information data is collected in real time, and the signal feature extraction based on the sliding time window mechanism is established for the real-time channel state information data flow, and the subcarrier amplitudes of all data in the sliding time window are averaged to obtain a Vector of mean carrier amplitudes to characterize the signal.

[0032] In the wireless transmission process, wireless communication can be simply modeled as:

[0033] y(t)=h(t) x(t)+z(t)

[0034] Here t is time, y is the received signal, x is the transmitted signal, h is the channel response or channel state information, usually it is a complex number, representing the signal amplitude and phase information, z is Gaussian white noise. In a traditional indoor environment, a transmitted signal can propagate t...

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Abstract

The invention relates to an unsupervised human detecting and positioning method. The method includes the steps that a transmitter transmits signals, and the signals pass through a monitoring area and are received by a receiver; channel state information data are collected in real time, subcarrier amplitudes of all data in a sliding time window are averaged to obtain a vector containing the average of all the subcarrier amplitudes, and the vector serves as the signal characteristic; the signal characteristic of the detection signals is extracted from the sliding window, the correlation between the detection signal characteristic and the static standard signal characteristic is calculated, if the correlation received by all receiver antennas is larger than a set threshold value, it shows that the human body appears in the monitoring area, the position of the human body is positioned, or else signal detection is continued on the monitoring area; parameter information in a positioning model parameter file is read, the probabilities, at all positions capable of being positioned, of the detection signal characteristic are calculated, and the position with the largest probability correlation is the position where the human body is located most likely.

Description

technical field [0001] The invention relates to wireless positioning technology, in particular to an unsupervised human body detection and positioning method. Background technique [0002] With the rapid development of WLAN technology, a large number of wireless WLAN devices are deployed in places where people frequently move. The WLAN-based positioning system has developed rapidly, and a large number of reliable and stable indoor wireless positioning systems have flooded into the market. The wireless WLAN positioning system includes an important system: wireless passive human body detection and positioning. Wireless passive human detection and positioning refers to the use of wireless technology to detect, locate, and track the activities of non-cooperative personnel in the monitoring area. Non-cooperative personnel are defined as people who do not carry positioning electronic equipment and do not actively participate in positioning data collection activities. Likewise, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/12G01S1/02
Inventor 杨武宫良一王巍苘大鹏玄世昌申国伟
Owner HARBIN ENG UNIV
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