Time Multiplexed Optical-OFDMA for Uplink Transmission in LiFi-based IoT Networks

Main Article Content

Md. Jahid Hasan
Oussama Haddad
Ikenna Chinazaekpere Ijeh
Md. Abdur Rahman

Abstract

The transfer of data from multiple internet of things (IoT) devices requires the use of a robust and efficient multiple access (MA) solution. This paper considers the orthogonal frequency division MA (OFDMA) technique for the light-fidelity (LiFi)-based IoT uplink using infrared to transmit data from multiple mobile users to a fixed access point. The conventional schemes based on orthogonal frequency allocate distinct subcarriers to each user sharing the same time slot. We consider a new approach by allocating distinct time slots to a group of OFDMA users. Taking into account realistic opto-electronic components, we study the performance of the conventional and proposed optical-OFDMA schemes. We show that asymmetrically clipped optical-OFDMA signaling scheme outperforms direct current biased signaling in terms of electrical power efficiency. Focusing on the asymmetrically clipped signaling, We demonstrate the robustness of our proposed time multiplexed optical-OFDMA scheme against MA interference caused by signal clipping. We also show the advantages of our scheme in reducing computational complexity by a factor of 2 compared to the conventional optical-OFDMA schemes.


 

Article Details

How to Cite
[1]
M. J. Hasan, O. Haddad, I. C. Ijeh, and M. A. Rahman, “Time Multiplexed Optical-OFDMA for Uplink Transmission in LiFi-based IoT Networks”, AJSE, vol. 22, no. 2, pp. 164 - 173, Aug. 2023.
Section
Articles

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.