Back to Search
Start Over
Time Multiplexed Optical-OFDMA for Uplink Transmission in LiFi-based IoT Networks
- Source :
- AIUB Journal of Science and Engineering (AJSE); Vol 22 No 2 (2023): AJSE Volume 22 Issue 2; 164 - 173; 2520-4890; 1608-3679; 10.53799/ajse.v22i2
- Publication Year :
- 2023
-
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. &nbsp
Details
- Database :
- OAIster
- Journal :
- AIUB Journal of Science and Engineering (AJSE); Vol 22 No 2 (2023): AJSE Volume 22 Issue 2; 164 - 173; 2520-4890; 1608-3679; 10.53799/ajse.v22i2
- Notes :
- application/pdf, English
- Publication Type :
- Electronic Resource
- Accession number :
- edsoai.on1397613256
- Document Type :
- Electronic Resource