Title :
PWM-based PPM format for dimming control in visible light communication system
Author :
Jang, Hyung-Joon ; Choi, Joon-Ho ; Ghassemlooy, Z. ; Lee, Chung Ghiu
Author_Institution :
Dept. of Electron. Eng., Chosun Univ., Gwangju, South Korea
Abstract :
We report simulation results of pulse width modulation (PWM)-based pulse position modulation (PPM) signal format for visible light communication systems. For simultaneous operation of data transmission and dimming control, PPM data format is added to PWM dimming control signal. To show dimming control, the PWM duty ratio is changed from 40 % to 80 % during PPM data transmission. The PWM frame rate is set to 1 kHz to avoid flickering in human eyes. The PPM data rate is set to 20 kb/s. The waveforms, eye diagrams and BER of this system are calculated. The simulation shows the BER of 1×10-5 is achievable.
Keywords :
error statistics; optical communication; pulse position modulation; pulse width modulation; BER; PWM-based PPM format; dimming control; pulse position modulation; pulse width modulation; signal format; visible light communication system; Light emitting diodes; Lighting; Optical pulses; Optical receivers; Optical reflection; Optical transmitters; Pulse width modulation;
Conference_Titel :
Communication Systems, Networks & Digital Signal Processing (CSNDSP), 2012 8th International Symposium on
Conference_Location :
Poznan
Print_ISBN :
978-1-4577-1472-6
DOI :
10.1109/CSNDSP.2012.6292778
