Daylight source based indoor communication modulation device, communication method and system

A visible light communication and sunlight technology, applied in the field of visible light communication, can solve the problems of unsatisfactory communication efficiency and high noise floor of visible light communication, and achieve the effect of improving signal-to-noise ratio and high communication efficiency

Active Publication Date: 2018-05-29
SOUTHEAST UNIV
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Problems solved by technology

[0005] In order to solve the shortcomings of the existing technology, the purpose of the present invention is to provide an indoor communication modulation device, communication method and system based on a sunlight light source, which is used to solve the problems of high noise floor and unsatisfactory communication efficiency of visible light communication in an environment with sufficient sunlight. question

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  • Daylight source based indoor communication modulation device, communication method and system
  • Daylight source based indoor communication modulation device, communication method and system
  • Daylight source based indoor communication modulation device, communication method and system

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[0039] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0040] In order to meet the needs of indoor communication, the electro-optical response rate of the optical modulator needs to be high enough. If 1MBaud / s is to be achieved, the total response time (rising edge time + falling edge time) of the single electro-optical effect of the modulator is required to be less than 1μs, (that is, at least 10^6 "rising and falling" operations can occur per second ). At present, the response time in the field of smart glass research is basically above ms, which obviously cannot meet the communication requirements. Therefore, it is necessary to seek electro-optical materials with high response rate (that is, faster response to voltag...

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Abstract

The invention discloses a daylight source based indoor communication modulation device, communication method and system. First of all, through a voltage signal module, an electrode and an electro-optical effect module connected in sequence, to-be-transmitted data are generated into a voltage signal according to set modulation depth and bias; then, the voltage signal is applied to the electro-optical effect module, and modulation is performed on daylight emitted into a room or an indoor illumination source via the electro-optical effect module; and a photosensitive device, a trans-impedance amplifier and a signal processing module at a receiving device end receive and process; according to the scheme provided by the invention, as the modulation can be performed on natural light emitted intothe room directly via the electro-optical effect module arranged on a door and a window, the daylight can be directly used in indoor communication; and thus, while illumination is implemented in an intelligent adjustment room, daylight used as a ground noise in an existing wireless visible light communication scheme is utilized as a communication light source, thereby improving the communicationefficiency; and the daylight source based indoor communication modulation device, communication method and system can be compatible with the existing wireless visible light communication scheme.

Description

technical field [0001] The present invention relates to visible light communication technology, in particular to a method and system for directly using sunlight to realize indoor communication. Background technique [0002] Currently, indoor visible light communication is usually implemented based on LED light sources. The scheme realizes indoor wireless communication by modulating LED lighting sources. However, due to the complexity of indoor light sources, especially the sunlight entering the window, its frequency band will overlap with the communication frequency band of LEDs. Therefore, indoor visible light communication based on LEDs will suffer from signal degradation (larger noise floor) and wasteful Insufficient energy (there is no need to turn on the lights in a well-lit room). [0003] Considering indoor lighting requirements and user habits, LED light sources are rarely used as the only indoor light source. Therefore, the existing indoor communication method ba...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/564
CPCH04B10/116H04B10/564
Inventor 刘天远孙小菡牟星
Owner SOUTHEAST UNIV
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