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Wi-Fi imaging method based on channel state information

A technology of channel state information and imaging method, applied in the field of Wi-Fi imaging, can solve the problems that rescuers cannot grasp, increase the difficulty of rescue, complex and expensive equipment, etc., and achieve the effect of fast imaging effect, low cost and simple configuration

Inactive Publication Date: 2020-08-25
ZHEJIANG UNIV OF TECH
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Problems solved by technology

For example, when an indoor emergency such as a bank robbery occurs, the culprit will definitely find a way to destroy the indoor monitoring first, causing rescuers to be unable to grasp the indoor situation and making rescue more difficult, and the imaging technology of wireless signals is the solution to this problem one of the important means of
[0003] At present, imaging technology based on wireless signals mainly uses radar, millimeter wave, ultrasonic and other signals, but the disadvantage is that the equipment required for imaging technology based on these signals is complex and expensive

Method used

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  • Wi-Fi imaging method based on channel state information
  • Wi-Fi imaging method based on channel state information
  • Wi-Fi imaging method based on channel state information

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Embodiment Construction

[0035] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0036] refer to Figure 1 ~ Figure 4 , a Wi-Fi imaging method based on channel state information, comprising the following steps:

[0037] Step 1: Build a CSI-based Wi-Fi imaging system. The schematic diagram of the imaging system is as follows figure 2 As shown, the imaging target object is a metal cross. The system is mainly composed of the following hardware: a common router, a fixed reference receiving antenna, a mobile receiving antenna, a common notebook equipped with CSI Tool, and a two-dimensional Plane, stepper motor, stepper motor driver, microcontroller;

[0038] Step 2: Set the mobile antenna scanning path;

[0039] Step 3: Obtain...

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Abstract

The invention discloses a Wi-Fi imaging method based on channel state information (CSI), the used imaging method can be completed only by depending on common commercial communication equipment, and Wi-Fi signals generated by a general router can be used as signal sources. CSI information of the Wi-Fi signals is extracted from the wireless network card through open-source software CSI-Tool, and thedata is applied to a reconstruction algorithm of angular spectrum diffraction. Through the method, not only can the image of the target object be reconstructed, but also the image of the emission source can be reconstructed, and the resolution is good. The method has certain application value in the fields of anti-terrorism, search and rescue, remote sensing, surveying and mapping and the like.

Description

technical field [0001] The invention relates to the field of Wi-Fi imaging. The current open source CSI-Tool software toolkit is used to collect channel state information (CSI) of Wi-Fi signals, and a target object is imaged according to the CSI information. Background technique [0002] Indoor object imaging using wireless signals has always been a research hotspot because of its wide application scenarios, especially in anti-terrorism, search and rescue, remote sensing, surveying and mapping, etc. For example, when an indoor emergency such as a bank robbery occurs, the culprit will definitely find a way to destroy the indoor monitoring first, causing rescuers to be unable to grasp the indoor situation and making rescue more difficult, and the imaging technology of wireless signals is the solution to this problem one of the important means. [0003] At present, imaging technology based on wireless signals mainly uses radar, millimeter wave, ultrasonic and other signals, bu...

Claims

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Application Information

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IPC IPC(8): H04W4/30H04B17/309
CPCH04B17/309H04W4/30
Inventor 吴哲夫龚振刚
Owner ZHEJIANG UNIV OF TECH