Performance Analysis of Indoor Visible Light ACO-OFDM Coding

Abstract

With the research and development of visible light communication technology, more and more researchers have begun to pay attention to more effective and reliable modulation technology and channel coding technology. In order to reduce the bit error rate of the shortwave wireless visible light communication system and increase the signal rate in the transmission process, the high efficiency and reliability of the modulation and demodulation technology must be realized. Therefore, the asymmetric limit orthogonal frequency division multiplexing technology (ACO-OFDM) is due to it’s excellent anti-interference ability and power efficiency are widely used in visible light communication systems. This article will introduce in detail the basic principles of ACO-OFDM technology, Hermitian mapping, and use BPSK, 4-PPM,16QAM for bit error rate simulation analysis, and select a modulation method rate with a lower bit error rate; analyze the linear block code, BCH The basic principles of coding and convolutional codes, and ACO-OFDM systems based on these three coding methods are simulated by Simulink, and their bit error rates are compared. Finally, ACO-OFDM based on convolutional codes was selected. This system is more suitable for visible light communication.