Multi-slot energy harvesting wireless communication in interference environment

Area of Science:

• Wireless communication
• Energy harvesting technologies
• Electromagnetic energy transfer

Background:

• Radio frequency energy harvesting (RF-EH) offers a sustainable power alternative for communication devices, reducing reliance on batteries and the power grid.
• Wireless channels are subject to fading and co-channel interference (CCI), significantly impacting both EH efficiency and communication performance.
• Existing analyses often oversimplify the complex interplay between EH and wireless communication under realistic channel conditions.

Purpose of the Study:

• To derive exact closed-form expressions for the effective throughput of multi-slot EH schemes under Rayleigh fading and CCI.
• To analyze and compare the performance of "harvest-store-use" and "harvest-use" EH strategies.
• To investigate the dual role of CCI in enhancing energy harvesting while potentially degrading signal reception.

Main Methods:

• Theoretical derivation of closed-form expressions for effective throughput.
• Analysis of "harvest-store-use" and "harvest-use" multi-slot energy harvesting schemes.
• Simulation of performance under Rayleigh channel fading and co-channel interference (CCI).

Main Results:

• Co-channel interference (CCI) positively impacts energy harvesting efficiency for the EH device in Rayleigh fading channels.
• CCI detrimentally affects the reception quality of desired signals for the information receiving device.
• The "harvest-store-use" and "harvest-use" schemes exhibit distinct operational mechanisms, conditions, and communication performance.

Conclusions:

• Optimizing time slots is crucial for balancing transmission probability, delay, and minimizing CCI impact on desired signals.
• Selecting appropriate time slots can enhance energy conversion efficiency in the energy harvester.
• Strategic management of CCI is essential for maximizing the benefits of RF-EH while ensuring reliable communication.