QAM based high power LED visible light communication system

EasyChair Preprint no. 581

Abstract

The wireless communication is facing challenge with the growth of information volume. Visible Light Communication (VLC) based on LED shows potential to solve this problem. It has the capacity of using higher frequency in electromagnetic spectrum. Besides, it can also provide another advantages, such as security, electromagnetic interference (EMI) free, license-free and in the same time have illumination function, which can save extra power. But it also has some congenital defects. Although, there are researches about finding special high-speed LED for achieving higher communication volume, it suffers from the sharp decrease of quantum efficiency with increasing injection current, which is hard for maintaining the illumination function and extending the communication distance.

In this paper, a quadrature amplitude modulator (QAM) based visible light communication (VLC) system with high power LED is implemented. This LED is low cost and high power, which means it can be popularized in our daily life. Furthermore, we use QAM to modulate the data, and it can break through the limitation of LED’s modulation speed. This work demonstrates the realizability of adding communication function on existing LED illumination system.

Keyphrases: high power LED, QAM, Visible Light Communication

@Booklet{EasyChair:581,
  author = {Xing Mou and Xiaohan Sun and Tianyuan Liu},
  title = {QAM based high power LED visible light communication system},
  howpublished = {EasyChair Preprint no. 581},

  year = {EasyChair, 2018}}