Channel characterization and analysis for indoor non-line-of-sight ultraviolet communications

Area of Science:

• Optical Wireless Communications
• Electromagnetic Wave Propagation
• Channel Modeling

Background:

• Existing ultraviolet (UV) channel modeling primarily focuses on outdoor environments.
• Indoor UV communication scenarios are significantly underexplored, creating a research gap.
• Accurate indoor channel models are crucial for developing practical UV communication systems.

Purpose of the Study:

• To systematically investigate UV propagation characteristics in indoor environments.
• To develop and validate novel channel models for both obstruction-free and obstructed indoor UV scenarios.
• To analyze the impact of various parameters on indoor UV path loss and signal energy.

Main Methods:

• Developed a non-line-of-sight (NLOS) channel model for obstruction-free indoor UV propagation.
• Incorporated air scattering and multi-surface reflections (walls, ceiling, floor) into the model.
• Extended the model for obstructed scenarios by integrating obstacle spatial parameters.
• Validated simulation results against a reflection-assisted Monte Carlo photon-tracking model.

Main Results:

• Proposed model's path loss curves show strong agreement with the Monte Carlo photon-tracking model.
• Quantified indoor UV path loss, scattered energy, and reflected energy.
• Identified dependencies of these parameters on communication range, transceiver elevation angles, receiver field-of-view, and obstacle characteristics.

Conclusions:

• The developed models provide a robust framework for understanding indoor UV channel behavior.
• The findings offer valuable insights for the design and optimization of indoor UV communication systems.
• This research bridges the gap in current knowledge regarding indoor UV channel characteristics.