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An Indoor Intrusion Detection Method Based on Sparse Representation of CSI Signal

A technology of signal sparseness and intrusion detection, applied in the direction of electric alarms, instruments, burglar alarms, etc., can solve the problems of human intervention, high cost, and large amount of calculation, so as to avoid offline training process and reduce workload , Solve the effect of the decline in recognition accuracy

Active Publication Date: 2022-01-25
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an indoor intrusion detection method based on the sparse representation of CSI signals to overcome the defects of high cost, human intervention, and large amount of calculation in the prior art. problem, to achieve accurate detection of intrusion behaviors in different perception environments using the same feature parameter

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  • An Indoor Intrusion Detection Method Based on Sparse Representation of CSI Signal
  • An Indoor Intrusion Detection Method Based on Sparse Representation of CSI Signal
  • An Indoor Intrusion Detection Method Based on Sparse Representation of CSI Signal

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[0042] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0043] In this embodiment, an indoor intrusion detection method based on sparse representation of CSI signals, such as figure 1 , 2 shown, including the following steps:

[0044] Step 1: Arrange one transmitting antenna and M receiving antenna arrays distributed at equal intervals in an indoor environment, set a time window of size T to record T snapshot CSI data on the M antenna arrays, and record continuously t windows;

[0045] The CSI data recorded in the tth time window of size T is a T×M dimensional CSI matrix Among them, CSI t is the CSI data of T snapshots in the tth time window, H g is the single snapshot CSI data of the gth time, g=1, 2,..., T, h TM Take ...

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Abstract

The invention provides an indoor intrusion detection method based on sparse representation of CSI signals, and relates to the technical field of indoor intrusion detection. This method records T snapshot CSI data on M antenna line arrays through multiple time windows; mathematically decomposes each single snapshot CSI data in each window, and defines an overcomplete dictionary D; uses relaxation algorithm to solve The optimal sparse representation of the T snapshot CSI data in each time window under the over-complete dictionary D, the sparse coefficient under the optimal sparse representation is obtained, and the signal arrival angle corresponding to the sparse coefficient of each snapshot is extracted as the signal arrival angle Feature information, and finally get T signal arrival angles in a time window; calculate the maximum amplitude of T signal arrival angles in each time window, and set a threshold to evaluate the indoor safety index ISIN of each window time period, and then It is realized to judge whether there is an intrusion behavior in the indoor environment within each window time period.

Description

technical field [0001] The invention relates to the technical field of indoor intrusion detection, in particular to an indoor intrusion detection method based on sparse representation of CSI signals. Background technique [0002] Intrusion detection technology can monitor a specific area in real time, detect whether there is any illegal intrusion by analyzing the data collected by the computer, and send an alarm notification if there is an abnormal situation. Traditional intrusion detection technologies are based on computer vision, infrared, ultra-wideband or radar, etc.; traditional methods have achieved satisfactory performance and are widely used, but most of them are invasive and have certain limitations. Specific sensing devices have a single application scenario, which leads to issues such as privacy and deployment costs. With the popular deployment of Wireless Fidelity (WiFi) devices in various places, most indoor working and living environments have been covered by...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B13/24
CPCG08B13/2491
Inventor 陶志勇白立春刘影任晓奎刘鹏飞
Owner LIAONING TECHNICAL UNIVERSITY
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