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Universal serial bus (USB)-interface-based pluggable visible like wireless access system

A technology of wireless access system and USB interface, which is applied in the direction of short-distance system and free space transmission, which can solve the problems of electromagnetic interference and limited transmission rate, and achieve the effect of simplifying circuit design

Inactive Publication Date: 2013-01-16
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional wireless access methods need to occupy increasingly scarce spectrum resources, the transmission rate is limited, and there is electromagnetic interference

Method used

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  • Universal serial bus (USB)-interface-based pluggable visible like wireless access system
  • Universal serial bus (USB)-interface-based pluggable visible like wireless access system
  • Universal serial bus (USB)-interface-based pluggable visible like wireless access system

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0024] Such as figure 1 The shown hot-swappable visible light wireless access system based on a USB interface includes a first USB interface, a first level conversion circuit, a sending end, a receiving end, a second level conversion circuit, and a second USB interface. The first USB interface is connected to the input end of the first level conversion circuit, and the output end of the first level conversion circuit is connected to the sending end. The receiving end is connected to the input end of the second level conversion circuit, and the output end of the second level conversion circuit is connected to the second USB interface. The sending end includes sequentially connected voltage followers and LED devices, and the receiving end includes sequentially connected photodetectors, amplifiers, and decision circuits.

[0025] The first level con...

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Abstract

The invention discloses a universal serial bus (USB)-interface-based pluggable visible like wireless access system, which comprises a first USB interface, a first level conversion circuit, a transmitter, a receiver, a second level conversion circuit and a second USB interface, wherein each level conversion circuit comprises an interface circuit and an impulse processing circuit; the transmitter comprises a voltage follower and a light-emitting diode (LED) device; and the receiver comprises a photoelectric detector, an amplification circuit and a decision device. According to the USB-interface-based pluggable visible like wireless access system, the duplex transmission of a high-speed digital signal can be supported to realize electromagnetic interference-free high-capacity short-distance wireless communication.

Description

technical field [0001] The invention relates to a hot-swap visible light wireless access system based on a USB interface, and belongs to the technical field of wireless communication. Background technique [0002] As an important means of communication, wireless access has always played a decisive role in the field of modern communication, and wireless access technology has become a key issue in wireless communication. Traditional wireless access methods need to occupy increasingly scarce spectrum resources, the transmission rate is limited, and there is electromagnetic interference. However, the rapid development of optical communication and its key components has made visible light communication a global research hotspot, utilizing the advantages of high speed, large capacity, and wide bandwidth of optical carrier frequency to realize high-speed transmission of large-capacity digital signals. [0003] Visible light communication technology uses high-speed bright and dark ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116
Inventor 王永进丁礼伟刘芳何颖洁于庆龙李丽
Owner NANJING UNIV OF POSTS & TELECOMM
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