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Wireless communication method based on two-dimensional visible light

A wireless communication and visible light technology, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve the problems of inconvenient popularization and implementation, and achieve the effects of increasing anti-interference ability, saving costs, and reducing hardware expenses

Inactive Publication Date: 2009-01-07
林灯生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned technology needs special receiver, comprises the photosensitive diode that is used for receiving visible light and related drive, so above-mentioned technology is not easy to popularize and implement generally; Publication number is CN1702984, and the public date is the Chinese patent application on November 30th, 2005 A method of using a camera to receive LED-based visible light communication is proposed. With this method, the receiving end does not need to use a special photosensitive diode and related drivers, and only needs a camera to realize LED-based visible light communication.
But the technology requires hardware changes to the cameras used to implement visible light communication to enable this functionality

Method used

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  • Wireless communication method based on two-dimensional visible light
  • Wireless communication method based on two-dimensional visible light
  • Wireless communication method based on two-dimensional visible light

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] like figure 1 As shown, the present invention discloses a wireless communication method based on two-dimensional visible light, including a transmitting end processing step and a receiving end processing step,

[0033] The processing steps at the transmitting end are as follows:

[0034] 1), the original data sent by the information source is sent to the conventional transmission baseband processing module, and the conventional transmission baseband processing module performs interleaving, channel coding and modulation processing on the original data sent by the information source;

[0035] 2), the data processed by the conventional transmission baseband processing module is input to the insertion pilot module, and the insertion pilot module inserts the pilot sequence in the signal sequence processed and output by the conventional transmission baseband processing module, the pilot sequence The frequency sequence is used to determine the specific position of the transmi...

Embodiment 2

[0044] like figure 2 and image 3 Shown: the two-dimensional visible light transmitter is a computer, and the two-dimensional visible light receiver is a mobile phone with a camera;

[0045] The transmitting end

[0046] like image 3As shown, the signal to be sent is sent to the CPU from the source, and the CPU completes the processing of the conventional transmission baseband processing module according to the software instruction and inserts the pilot frequency, and then the processed signal is sent to the display through the channel of the device itself. screen, which dynamically and continuously displays the optical video signal to be sent on the entire surface of the display screen or a part of it;

[0047] Receiving end

[0048] like image 3 As shown, aim the camera at the display screen of the computer, and capture the image emitted on the display screen. Then the camera converts the captured optical image signal into an electrical signal, and sends it to the C...

Embodiment 3

[0050] On the basis of Embodiment 1, there are four pilot sequences, and their positions in the signal sequence are the four pilot sequences that are just located in the rectangle formed by the visible light signal after the next serial-to-parallel conversion. angle, and each pilot sequence forms a square in the visible light array, the pilot sequences well known to those skilled in the art are applicable, such as Figure 4 As shown; the pilot sequence can be 1, 2, 3 or several, and the pilot sequence is located in the two-dimensional array formed by the visible light signal after the serial-to-parallel conversion step. The shape of the two-dimensional visible light array is polygonal, circular or irregular. The two-dimensional visible light transmitter may be a display screen such as a CRT, LCD, LED, or a TV screen. The two-dimensional visible light receiver can be a camera or a camera. When the camera or camera is aligned with the two-dimensional visible light transmitter f...

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Abstract

The invention discloses a wireless communication method based on two-dimensional visible light, and is characterized in that the method comprises the step of transmitting terminal processing and the step of receiving terminal processing. The method can be adopted on many occasions including short distance wireless communication between computers that are provided with cameras, wireless loading data by a mobile phone which is provided with a camera from a computer, internally wireless communication between mobile phones which are provided with cameras, etc. By adopting the wireless communication method, the short distance wireless communication can be realized only by software without adding or changing hardware.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a wireless communication method based on two-dimensional visible light. Background technique [0002] Wireless communication using visible light has come a long way in recent years as technology has advanced. Japanese Patent Application No. 2004-221747 proposes the use of LED lamps for lighting as a transmitter, and Japanese Patent Application No. 2002-202741 proposes the use of visually unrecognizable high-speed flashing LED lights. communication to increase the rate of information transmission. Both of the above two patent documents involve the transmission of data through high-speed control of LED on and off. The biggest feature of this technology is that it can use free visible light as the medium of wireless communication, and the transmitter can use As an LED lamp for lighting, there is no need to add a special transmitter, only the control circuit i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/10H04B10/116
Inventor 林灯生
Owner 林灯生
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