"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Li-Fi system performance considering different modulation techniques under the influence of ambient noise

NABADH BHAN1, SANMUKH KAUR1,* , NIVEDITA NAIR1

Affiliation

  1. Amity School of Engineering & Technology, Amity University, Noida, 201313, India

Abstract

Light fidelity (Li-Fi) is an indoor optical communication technology used for transmission of information at high data rates using LED light bulbs. This is the most prominent technology of the future as it combines illumination with wireless data communication system. This work investigates the performance of an indoor Li-Fi communication model under the influence of an external white light source and compares the effectiveness of different modulation techniques employed when exposed to an ambient noise source. The study is carried out considering pulse position modulation (PPM), differential phase shift keying (DPSK) and quadrature phase shift keying (QPSK) modulation techniques and the system is analyzed considering varying bit rates and transmission ranges from 1 to 5 meters. QPSK results in better performance as compared to other modulation schemes with an achievement of Q factor of more than 20 over a transmission range up to 2.8 m..

Keywords

Light fidelity (Li-Fi), Modulation techniques, PPM, DPSK, QPSK, Thermal noise source, External light source.

Submitted at: Aug. 16, 2021
Accepted at: June 7, 2022

Citation

NABADH BHAN, SANMUKH KAUR, NIVEDITA NAIR, Li-Fi system performance considering different modulation techniques under the influence of ambient noise, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 5-6, pp. 221-229 (2022)