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The Journal of The Korea Institute of Intelligent Transport Systems Vol.9 No.2 pp.60-67
지능형 교통 시스템을 위한 Turbo Code OFDM 적용한 가시광 통신 시스템에 관한 연구
A Study on Visible Light Communication with Turbo Code OFDM for Inteligent Transport Systems
Abstract
In the ubiquitous age, applications of wireless personal area network (WPAN) technology using LEDs are in progress. However, visible light communications (VLC) using the LEDs have weakness which deteriorate performance of communication because of multi-path fading that occurs propagation delay by interior walls or other things in indoor environments. In this paper, orthogonal frequency division multiplexing (OFDM) scheme is adapted to decrease multi-path fading and multi-path dispersion and to provide high speed data transmission. Besides, to reduce information losses caused by optical noise (incandescent lamps, fluorescent lamps, sunbeam etc.) also proposed channel coding using turbo codes. The encoding and decoding of the proposed system is described, and simulation results are analyzed. We can know that performance of proposed system is increased about 4 [dB] through the simulation results. Also, when the system take doppler effect, the system performance worsened.
