Analytical link bandwidth model based square array reception for non-line-of-sight ultraviolet communication

Area of Science:

• Optical Communications
• Wireless Communication Systems
• Atmospheric Optics

Background:

• Non-line-of-sight (NLOS) communication presents unique challenges for signal integrity.
• Ultraviolet (UV) communication offers potential for high-bandwidth, secure wireless links.
• Characterizing link bandwidth in NLOS UV channels is crucial for system design.

Purpose of the Study:

• To develop an analytical model for NLOS UV channel link bandwidth.
• To investigate the impact of receiver array design on link bandwidth.
• To provide guidance for NLOS UV communication link analysis and receiver design.

Main Methods:

• Formulation of an analytical model for NLOS UV link bandwidth.
• Inclusion of geometrical parameters: transmitter elevation angle, receiver field of view (FOV), and transceiver separation distance.
• Software-aided numerical fitting and Monte Carlo simulations for model validation.
• Design and analysis of a spatially squared distributed receiver (Rx) array.

Main Results:

• The analytical model accurately predicts link bandwidth, validated against Monte Carlo simulations.
• A spatially squared Rx array significantly reduces temporal broadening.
• Over 100% improvement in link bandwidth is achieved with the square array reception.
• Bandwidth improvement ratio increases with narrower transmitter (Tx) beam divergence.

Conclusions:

• The developed analytical model is effective for NLOS UV link bandwidth analysis.
• Spatially distributed receiver arrays are a promising approach to enhance NLOS UV communication performance.
• The findings offer practical insights for optimizing NLOS UV communication systems.