Design and implementation of multi-person indoor environment state monitoring system based on WiFi channel state information

A technology for channel state information and state monitoring, which is applied in the identification, calculation, wireless communication and other directions of patterns in the signal to achieve the effect of expanding the application field and ensuring authenticity.

Active Publication Date: 2017-05-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

[0005] [Purpose of the invention]: the present invention mainly solves the problem of multi-person indoor state monitoring in the WiFi environment

Method used

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  • Design and implementation of multi-person indoor environment state monitoring system based on WiFi channel state information
  • Design and implementation of multi-person indoor environment state monitoring system based on WiFi channel state information
  • Design and implementation of multi-person indoor environment state monitoring system based on WiFi channel state information

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific examples.

[0021] The system consists of two parts: a signal transmitter and a signal receiver. Use the existing commercial WiFi equipment as the signal transmitter, and use the device (notebook or desktop) equipped with Intel5300 as the signal receiver. Deploy two routers, one router is used to monitor the behavior of people entering and leaving, and the other router is used to monitor the status of the number of people in the room. as attached figure 1 As shown in the experimental environment diagram, after the data is collected, the CSI data will be processed, and the entry and exit detection model and the number of people recognition model will be established respectively, as shown in the attached figure 2 As shown, the specific implementation process is as follows:

[0022] Step 1: Denoise the CSI data

[0023] Step 1.1: Denoise with Butterworth ...

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Abstract

The invention discloses design and implementation of a multi-person indoor environment state monitoring system based on WiFi channel state information. According to the design and implementation provided by the invention, whether people come in and go out from a room is mainly monitored, and the number of people in the room is determined. According to the design and implementation provided by the invention, WiFi signals are applied to multi-person environmental perception for the first time, CSI (Channel State Information, channel state information) is obtained by use of the widely used WiFi signals, the CSI data are analyzed and processed, an effective denoising method is adopted to remove the environmental noise and extract the waveform, an indoor access monitoring model is established by using a hidden Markov method, a people number recognition model is established by using a neural network, and the people number recognition model is corrected by the access monitoring model, thereby further improving the people number recognition accuracy and effectively monitoring the indoor environmental state.

Description

technical field [0001] The invention discloses a multi-person indoor environment state monitoring system based on WiFi channel state information, which is mainly used to solve the problem of multi-person indoor environment state monitoring in a WiFi environment. The present invention mainly includes two parts of state monitoring: multi-person access monitoring and number determination , involving signal denoising, feature waveform extraction, model building for multi-person access monitoring and number determination, automatic model correction and other technologies. Background technique [0002] The wireless local area network based on WiFi technology has been widely used indoors, and the services it can provide are not limited to information communication. The rapid emergence of various emerging applications, such as human detection, indoor positioning, through-wall tomography activity recognition, etc., are constantly innovating the application field of wireless LAN. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/08H04W84/12G06K9/00G06K9/62G06N3/08
CPCH04W24/08H04W84/12G06N3/084G06F2218/10G06F2218/04G06F2218/12G06F18/2135G06F18/24Y02D30/70
Inventor 赵彦超刘尚清陈兵
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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