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The Modulation Technologies of Visible Light Communication

Chapter
Part of the Signals and Communication Technology book series (SCT)

Abstract

In visible light communication systems, the LED’s modulation bandwidth is quite limited. The 3-dB modulation bandwidth of the current commercially available LEDs is only few MHz. In order to improve the VLC system’s transmission data rate, apart from the LED structure and the drive circuit design, selecting the appropriate modulation format is one of the most important ways to expand the modulation bandwidth. OOK modulation and PPM/PMW modulation have an advantage regarding the system complexity; however, DMT modulation, OFDM modulation, and CAP modulation have better spectral efficiency and can overcome multipath effects. This chapter will introduce various modulation format principles and their implementations, advantages and disadvantages in visible light communication systems.

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Copyright information

© Tsinghua University Press, Beijing and Springer-Verlag GmbH Germany 2018

Authors and Affiliations

  1. 1.Fudan UniversityShanghaiChina

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