Title :
Power efficient visible light communication systems under dimming constraint
Author :
Kim, Jinwoo ; Lee, Kwonhyung ; Park, Hyuncheol
Author_Institution :
Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea
Abstract :
Visible light communication (VLC) is a short range optical wireless communication using the light emitting diode (LED) lights, which can provide both illumination and communication. In this paper, we characterize the indoor multi-path dispersion for VLC and propose multiple pulse position modulation (MPPM) as a power efficient modulation. Due to the reflections in indoor environment, equalization process is essential to mitigate inter-symbol interference (ISI). Frequency domain equalizer (FDE) is implemented to reduce computational complexity. We evaluate communication performance in terms of bit error rate (BER) and the spectral efficiency. Simulation results show that the proposed system yields a comparable BER performance to other equalization systems with lower complexity.
Keywords :
computational complexity; equalisers; frequency-domain analysis; intersymbol interference; light emitting diodes; pulse position modulation; radio-over-fibre; LED lights; bit error rate; communication performance; computational complexity; dimming constraint; equalization process; equalization systems; frequency domain equalizer; indoor environment; indoor multipath dispersion; inter-symbol interference; light emitting diode lights; multiple pulse position modulation; power efficient modulation; power efficient visible light communication systems; short range optical wireless communication; spectral efficiency; Brightness; Dispersion; Light emitting diodes; Lighting; Modulation; Optical pulses; Optical transmitters;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2012 IEEE 23rd International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
978-1-4673-2566-0
Electronic_ISBN :
2166-9570
DOI :
10.1109/PIMRC.2012.6362675