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On fundamental limits of energy-efficient signaling in visible light communication systems

Dastgheib, M. A ; Sharif University of Technology | 2023

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  1. Type of Document: Article
  2. DOI: 10.1109/LWC.2023.3290206
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2023
  4. Abstract:
  5. In this letter, we investigate the fundamental limits of energy efficiency in Visible Light Communication (VLC) systems, which rely on Light Emitting Diodes (LEDs) for both illumination and communication. Despite their promise for indoor wireless communications, VLC systems face challenges due to increased energy consumption compared to illumination-only systems. Our analysis focuses on the electrical behavior of key components in VLC transmitter circuits to address this issue. We introduce the problem of capacity per unit cost in optical intensity channels, aiming to maximize information transmission while minimizing power consumption. Lower and upper bounds for energy efficiency are obtained using channel capacity bounds and capacity-approaching distributions. Furthermore, we explore energy-efficient signaling schemes for class A and class AB VLC systems with discrete input distribution functions, employing the source entropy maximization approach. Our proposed scheme improves achievable energy efficiency by up to 98% at high Signal-to-Noise Ratios (SNRs), offering significant potential for designing sustainable and energy-efficient indoor communication networks. © 2012 IEEE
  6. Keywords:
  7. Capacity per unit cost ; Energy efficiency ; Joint illumination and communication ; LiFi ; Optical intensity channel ; Optical wireless communications ; Power consumption ; Sustainable communications ; Visible light communications
  8. Source: IEEE Wireless Communications Letters ; Volume 12, Issue 10 , 2023 , Pages 1731-1735 ; 21622337 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/10167772