On the Performance of Energy Harvesting Dual-Hop Free-Space Optical Communication Systems with Secrecy Analysis

Area of Science:

• Optical Communications
• Wireless Power Transfer
• Information Theory

Background:

• Free-space optical (FSO) communication systems offer high bandwidth but are susceptible to channel impairments.
• Simultaneous lightwave information and power transfer (SLIPT) presents a promising approach for energy-efficient FSO systems.
• Dual-hop relaying can enhance FSO system reliability and coverage.

Purpose of the Study:

• To propose and analyze a dual-hop decode-and-forward FSO communication system integrated with SLIPT.
• To investigate the performance of the proposed system under Malaga turbulence and pointing errors.
• To evaluate the physical layer security aspects of the SLIPT-enabled FSO system.

Main Methods:

• A dual-hop decode-and-forward relaying strategy is employed.
• Simultaneous lightwave information and power transfer (SLIPT) is utilized with a time-splitting relay.
• The system operates over Malaga turbulence channels with pointing errors.
• Closed-form expressions for performance metrics (outage probability, ergodic capacity, BER, throughput) and security metrics (secrecy outage probability, strictly positive secrecy capacity) are derived.
• Monte Carlo simulations are used for validation.

Main Results:

• Closed-form expressions for key performance and security metrics were derived.
• The proposed SLIPT-based dual-hop FSO system shows improved performance over its non-SLIPT counterpart.
• The analytical derivations were validated through Monte Carlo simulations.

Conclusions:

• The integration of SLIPT in dual-hop FSO systems enhances communication performance.
• The proposed system offers a viable solution for energy-efficient and reliable optical wireless communication.
• The derived analytical models provide valuable tools for system design and performance prediction.