Research Article
Design and Analysis on U-VLC-CC-CDMA Systems
@INPROCEEDINGS{10.1007/978-3-031-30237-4_16, author={Yang Qiu and Yu-juan Si and Xiao-yu Yu and Yue-xin Chen and Zai-xin Lin and Jing-yi Li and Shu-ming Gu}, title={Design and Analysis on U-VLC-CC-CDMA Systems}, proceedings={Machine Learning and Intelligent Communication. 7th EAI International Conference, MLICOM 2022, Virtual Event, October 23-24, 2022, Proceedings}, proceedings_a={MLICOM}, year={2023}, month={4}, keywords={Visible light communication CDMA Complementary code}, doi={10.1007/978-3-031-30237-4_16} }- Yang Qiu
Yu-juan Si
Xiao-yu Yu
Yue-xin Chen
Zai-xin Lin
Jing-yi Li
Shu-ming Gu
Year: 2023
Design and Analysis on U-VLC-CC-CDMA Systems
MLICOM
Springer
DOI: 10.1007/978-3-031-30237-4_16
Abstract
Visible light communication (VLC) has dual functions of communication and lighting, and is widely used in the next generation wireless communication field. A suitable multiple access method is needed in the multi-user scenario of visible light communication to eliminate interference. This paper designs a VLC code division multiple access (VLC-CDMA) using complementary codes (CCs). CCs have ideal autocorrelation and cross-correlation properties, which can be used to distinguish different users. The issues on periodicity and correlation of CCs in VLC-CDMA systems are discussed as preliminaries. The transmitter uses LEDs of different wavelengths to separate different sub-codes in the CCs. The compensation circuit is used to synthesize white light and realize equal gain combination of the received signals. The receiver uses a filter with different central wavelength to separate signals transmitted by different sub-codes and convert them into electrical signals. B/U and U/B modules at transmitter and receiver are designed to complete the conversion between unipolar signals and bipolar signals. The anti-interference performance and a theoretical analysis on BER are conducted to verify the effectiveness. In addition, we compare the performance of VLC-CDMA systems using CC, Walsh sequences and Gold sequences, which shows that VLC-CDMA system using CCs can eliminate multi-user and multi-path interference.
