조명용 LED를 이용한 무선 통신 시스템

Abstract

ABSTRACT

Wireless communication using light-emitting diodes for illumination

Choi, Joon Ho Advisor : Prof. Lee, Chung Ghiu, Ph.D. Department of Electronic Engineering, Graduate School of Chosun University

The objective of the research is to develop a MHz-range communication link using visible light-emitting diodes and an appropriate modulation format whi ch supports data communication upon illumination. Recently, the development of illumination LEDs in the visible light wavele ngth ranges has been active for LED illumination devices. As the communicati on technology based on visible LEDs is on the phase of standardization by IE EE 802.15, the research results from this thesis is important to develop a s ystem concept, standardization, and technology implementation. To implement communication transmitter and receiver for this experiment, t he inverter is used at 20 Mb/s to transmit data signal with the distance of 10 cm or 20 cm. On the other hand, it is performed to transmit PPM signal over PWM signal maintaining illumination. The generation and measurement of the PPM over PW M signals take advantage of 'LabVIEW'. The original PPM signal is recovered successfully with the receiver.