한국해양대학교

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광무선 센서네트워크를 위한 전력선통신기반 가시광통신 시스템 구현

Title
광무선 센서네트워크를 위한 전력선통신기반 가시광통신 시스템 구현
Alternative Title
Visible Light Communication System For Optical Wireless Sensor Networks Based on PLC-Ethernet Interface
Author(s)
이희진
Publication Year
2011
Publisher
한국해양대학교 대학원
URI
http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174629
http://repository.kmou.ac.kr/handle/2014.oak/8691
Abstract
Recently, the semiconductor technology has improved remarkably by many researchers. And there are many remarkable advanced technologies of LED(Light Emitting Diode) for illumination. LED offers quite advantageous properties such as low power consumption,

reliability, long lifetime and non-Mercury. The LED is the most adaptable light source in present and next generation which replace to incandescent and fluorescent light.

Also, The LED is a good source for visible light communication by its

performance as short switching time. If the LED is controled with switching over 100 times in a sec, the human eye can't see its blinking. And it is possible to use the LED illumination in communication.

There are many researches for LED visible light communication at companies, universities and research organizations. Also I research the visible light communication in an area of sensor network.

In this paper, It is presented a white LED-based optical wireless

communication systems for indoor ubiquitous sensor networks. Each sensor node could access to the server through the PLC(Power Line communication) - Ethernet interface. The proposed system offers a full-duplex wireless link by using different wavelengths to reduce the

inter-symbol interference between uplink and downlink. Through the 1-to-n optical wireless sensor network and PLC modem, the mobile terminals send a temperature data to server. The data transmission speed and distance are 115.2kbps and about 60cm. The AOD(Auto

optical detector) is applied in this system which improve a performance of communication distance. The communication distance is improved to maximum 1.9m when 'AOD' is applied to system.
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전자통신공학과 > Thesis
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