Symmetric carrier elimination optical communication method, visible light transceiver and visible light communication terminal

A technology of visible light communication and communication method, which is applied in the field of visible light transceivers and visible light communication terminals, and can solve problems such as difficult alignment and inability to cope with terminal movement

Active Publication Date: 2020-05-29
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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AI Technical Summary

Problems solved by technology

Due to the directional characteristics of visible light communication, the easiest way to realize point-to-point interconnection is to align and transmit between two terminals to obtain the visible light signal sent by the other terminal. However, this method has difficulty in alignment in practice and cannot cope with terminals. mobile issues etc.

Method used

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  • Symmetric carrier elimination optical communication method, visible light transceiver and visible light communication terminal
  • Symmetric carrier elimination optical communication method, visible light transceiver and visible light communication terminal
  • Symmetric carrier elimination optical communication method, visible light transceiver and visible light communication terminal

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Embodiment Construction

[0032] For point-to-point interconnection between visible light terminals, in addition to aligned transmission between terminals, indoors, visible light lighting APs can also be used to forward in various ways, but this increases the complexity of the system.

[0033] The use of light-scattering full-duplex communication can effectively expand the viewing angle of visible light communication and improve the alignment problem. However, general light-scattering full-duplex communication can only achieve one-way, because both sides emit light at the same time and will be superimposed on the shared reflective surface. At the same time, both parties interfere with each other and cannot receive each other's signal. And if half-duplex methods such as time-division multiplexing are used, the channel utilization rate is reduced.

[0034] The invention provides a symmetrical carrier cancellation optical communication method, a visible light transceiver and a visible light communication ...

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Abstract

The invention provides a symmetric carrier elimination optical communication method, a visible light transceiver and a visible light communication terminal, which are used for reducing the alignment difficulty of point-to-point interconnection. According to the symmetric carrier elimination optical communication method, a visible light communication terminal and an opposite terminal are communicated with the same reflecting surface. The method comprises: a visible light communication terminal sending a first visible light signal to a reflecting surface; the visible light communication terminalreceiving the visible light signal and converting into a first target electric signal; wherein the first target electric signal comprises a first receiving signal and a second receiving signal; wherein the first receiving signal is an electric signal which is transmitted to the reflecting surface by the first visible light signal and then received by the visible light communication terminal; wherein the second receiving signal is an electric signal received by the visible light communication terminal after the second visible light signal is transmitted to the reflecting surface; the visible light communication terminal performing channel estimation on the first received signal to obtain an estimated signal; and subtracting the estimation signal from the first target electric signal to obtain an estimation signal of the second receiving signal.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a symmetrical carrier elimination optical communication method, a visible light transceiver and a visible light communication terminal. Background technique [0002] With the continuous development of visible light communication technology, there is a strong demand for point-to-point interconnection between visible light terminals. Due to the directional characteristics of visible light communication, the easiest way to realize point-to-point interconnection is to align and transmit between two terminals to obtain the visible light signal sent by the other terminal, but this method has alignment difficulties in practice and cannot cope with terminal Mobile issues etc. Contents of the invention [0003] In view of this, embodiments of the present invention provide a symmetrical carrier cancellation optical communication method, a visible light transceiver, and a visible lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116
CPCH04B10/116
Inventor 任嘉伟朱义君汪涛田忠骏曲晶张二峰张艳语李盾
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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