Free-space optical channel simulator for weak-turbulence conditions

Area of Science:

• Optical communications
• Atmospheric physics
• Signal processing

Background:

• Free-space optical (FSO) communication systems are susceptible to atmospheric turbulence.
• Turbulence causes channel gain fluctuations and signal fading, degrading performance.
• Accurate modeling of turbulence effects is crucial for robust FSO system design.

Purpose of the Study:

• To develop a simple and effective simulator for weak-turbulence FSO channels.
• To emulate the temporal covariance effect of atmospheric turbulence.
• To provide a tool for analyzing FSO channel behavior under realistic conditions.

Main Methods:

• The proposed simulator utilizes lognormal distributed samples.
• A corresponding correlation time is incorporated into the model.
• The simulator is based on the solution of a first-order stochastic differential equation (SDE).

Main Results:

• The SDE analysis provides an effective method for turbulent channel modeling.
• The simulator accurately emulates the temporal covariance effect.
• The developed model demonstrates efficacy in simulating weak-turbulence FSO channels.

Conclusions:

• The proposed SDE-based simulator is effective for modeling weak-turbulence FSO channels.
• The simulator accurately captures temporal covariance effects, crucial for FSO performance.
• This work contributes a valuable tool for the research and development of FSO communication systems.