WIFI-based subcarrier detection and real-time visualization method, system and platform

A technology for detecting sub-carriers and sub-carriers, which is applied in the field of wireless networks, can solve problems such as the user's presentation effect is not intuitive enough, information transmission lags, and observation and analysis are inconvenient, and achieve the effects of easy operation, low cost, and avoiding experimental errors

Active Publication Date: 2022-04-29
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]The CSI Tools used today mainly collect channel information when collecting data and directly process it with related programs. Although the information collected by this method is accurate, it can be identified by the program and processing, but the rendering effect is not intuitive enough for users, and the collected information can only be understood in the form of images after certain processing, which makes the transmission of information lag to a certain extent
[0004] Moreover, the existing CSI Tools real-time visualization technology mainly draws when the subcarrier amplitude is set to the vertical axis and the subcarrier is set to the horizontal axis. Although the method has the advantage of being able to observe all subcarrier information at the same time, it still has certain defects: when using the change information of subcarriers for analysis, since only the amplitude information of subcarriers at a certain moment can be observed, it is difficult to To get the information of the next moment, the image needs to be changed, which makes observation and analysis inconvenient
[0005]Therefore, there is a certain lag in the transmission of the above information, and the image needs to be changed to obtain the information at the next moment, which makes observation and analysis inconvenient Problems and defects, it is urgent to design and develop a method, system and platform for subcarrier detection and real-time visualization based on WIFI

Method used

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  • WIFI-based subcarrier detection and real-time visualization method, system and platform

Examples

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Embodiment 1

[0082] Such as figure 2 As shown, this embodiment provides a subcarrier signal collection and real-time visualization system based on CSI Tools in an ideal environment without disturbance, including a signal sending module (router), a data receiving module (antenna), data processing and visualization module (microcomputer), the implementation of this system includes the following steps:

[0083] First, turn on the router and microcomputer, expose the experimental scene to the WIFI environment, ensure that the WIFI signal can be received stably, turn on matlab on the microcomputer and run relevant programs to prepare to receive data.

[0084] Among them, this patent uses the open-source read_bf_socket.m file for port connection and sub-carrier data acquisition, and successfully obtains three-dimensional sub-carrier data. In order to display sub-carrier information at different times on the same picture, such as image 3 , this example sets a fixed-length variable column (50 i...

Embodiment 2

[0089] Such as Figure 7 As shown, this experimental example provides a real-time visualization system based on interference in an environment, including a signal sending module (router), a data receiving module (antenna), a data processing and visualization module (microcomputer) and a disturbance-causing Observe the target.

Embodiment 2

[0090] The operation steps of the second embodiment are basically the same as those of the first embodiment, the difference lies in the observation results. In order to create an environment with disturbances, this example creates disturbances by repeatedly waving hands between the antenna at the receiving end and the antenna at the sending end. Observe the drawn image at this time ( Figure 2-3 ) It can be found that the six curves all have obvious disturbances, and because the hand-waving frequency is constant, the fluctuations of the curves are relatively uniform, and the fluctuations of different curves are different, which means that the subcarrier information on different antennas is different. At this time, due to different Different spatial regions corresponding to antennas lead to inconsistencies in the disturbances they receive. By analyzing the amplitude and phase of these changes, we can also obtain more specific information about the observation target, such as po...

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Abstract

The invention belongs to the technical field of wireless networks, and relates to a subcarrier detection and real-time visualization method, system and platform based on WIFI. Through the method and the corresponding system and platform, a mode of visualizing subcarrier information in real time by taking time as an abscissa and a subcarrier as an ordinate can be provided, and amplitudes of a subcarrier at different moments in a certain time period can be presented on the same image; the transformation condition of the subcarriers in the time period can be clearly known by observing the drawn image, and compared with a traditional mode, an observer can directly use naked eyes to carry out primary feature extraction conveniently, and the state of an observation target described by the subcarriers can be visually and accurately obtained. Corresponding subcarrier information between different transmitting antennas and receiving antennas in a certain period of time can be drawn at the same moment, so that real-time phase and amplitude analysis is facilitated, and more accurate target judgment is facilitated; and the scheme of the invention is easy to operate, and the cost required by experimental equipment is lower.

Description

technical field [0001] The invention belongs to the technical field of wireless networks, and in particular relates to a WIFI-based subcarrier detection and real-time visualization method, system and platform. Background technique [0002] With the popularity of wireless network technology, a series of research results related to it have gradually become an indispensable part of people's daily life, and play a decisive role in social development and technological progress. CSI Tools, which has emerged in recent years, is a detection technology based on WIFI. It can collect signals released by devices such as routers, and analyze the subcarriers of each channel to determine the status of the detected target. [0003] The CSI Tools used today mainly collect channel information when collecting data and directly process it with related programs. Although the information collected by this method is accurate and can be identified and processed by the program, the presentation effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/309H04L43/045G06F30/20
CPCH04B17/309H04L43/045G06F30/20
Inventor 刘勇许锦晨廖森林黄焕兴罗运杨阔王慧蔡志家王柯青丘凌锋
Owner SOUTH CHINA NORMAL UNIVERSITY
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