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Energy efficiency optimization in a parallel relay-assisted UWOC system with simultaneous lightwave information and
Applied Optics
|March 4, 2024
Summary
This study optimizes energy efficiency in underwater wireless optical communication (UWOC) using relay nodes for simultaneous lightwave information and power transfer (SLIPT). A novel algorithm significantly boosts system energy efficiency by optimizing the bias current.
Area of Science:
- Underwater Wireless Optical Communication (UWOC)
- Wireless Power Transfer
- Energy Harvesting
Background:
- Underwater communication faces challenges in bandwidth and energy.
- Simultaneous Lightwave Information and Power Transfer (SLIPT) offers a promising solution for energy-constrained systems.
- Relay-assisted systems can extend communication range and reliability.
Purpose of the Study:
- To optimize energy efficiency in a parallel relay-assisted UWOC system with SLIPT.
- To develop a method for maximizing system energy efficiency by adjusting the bias current.
- To analyze the impact of various system parameters on energy efficiency.
Main Methods:
- Derived harvested energy using the Gauss-Laguerre quadrature formula.
- Deduced outage probability using the Meijer-G function.
- Proposed a three-level-iteration algorithm involving the Dinkelbach method, penalty function method, and successive convex approximation to solve the energy efficiency maximization problem.
Main Results:
- Developed a method to calculate system energy efficiency.
- Formulated an energy efficiency maximization problem concerning bias current.
- The proposed algorithm successfully solves for the optimal bias current.
- Analyzed the influence of system parameters on energy efficiency.
Conclusions:
- The proposed three-level-iteration algorithm effectively maximizes energy efficiency in relay-assisted UWOC SLIPT systems.
- Optimizing the bias current is crucial for enhancing system performance.
- Theoretical and simulation results validate the significant improvements in energy efficiency achieved by the proposed method.
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