Indian Journal of Science and Technology

Abstract

In this article, a novel algorithm is proposed to eliminate the Inter-Cell Interference (ICI) for Visible Light Communication (VLC). The proposed algorithm is based on Hadamard Code (HC) and Pulse Amplitude Modulation (PAM). Four schemes of HCs distribution between nine cells are separately designed and tested within a room to mitigate the ICI, whereas PAM is used to improve data rate. The primary objective of this research is to evaluate the amount of power utilized by four proposed schemes to obtain the Channel Capacity Without Interference (CCWI). However, the higher order of PAM (HOP) uses high average power. This increases the ICI which is diminished by using additional power to achieve the CCWI. Therefore, predetermined power is derived for the receivers based on ICI. Moreover, theoretical SER is derived to achieve the trade-off between SER performance and flickering in the room. This is done by choosing positive and negative amplitude from DC bias (PND). The designed four schemes are validated by using computer-based simulation on MATLAB for VLC. The simulated results show that the overall performance of the 4th scheme is power efficient as compared to other three schemes.

Keywords: Hadamard Code, Inter-cell Interference, Visible Light Communication