Advanced FSO Link Budget Simulation with BER Analysis

This MATLAB script simulates FSO link performance under weather conditions and calculates BER.

Summary

This MATLAB script provides a comprehensive simulation framework for Free Space Optical (FSO) communication systems, modeling the effects of weather conditions, beam divergence, turbulence, and pointing errors on the system's performance. It calculates the link power budget and evaluates the Bit Error Rate (BER) for different wavelengths and distances.

Description

The Advanced FSO Link Budget Simulation is a MATLAB script designed to help researchers, students, and engineers analyze the performance of Free Space Optical (FSO) communication systems under real-world conditions. It calculates the received power, total loss, and BER for multiple weather scenarios, link distances, and operating wavelengths. This tool is invaluable for designing and optimizing FSO systems.

Key Features

Multi-Wavelength Analysis:

• Simulates FSO performance for 850 nm and 1550 nm wavelengths.

Weather Scenarios:

• Models Clear, Foggy, Rainy, Hazy, and Turbulent conditions with realistic attenuation coefficients.

Gaussian Beam Divergence:

• Calculates beam spreading losses over long distances.

Adaptive Optics for Turbulence:

• Includes turbulence effects mitigated by adaptive optics compensation.

Pointing Error Losses:

• Models geometric losses due to misalignment between transmitter and receiver.

BER Analysis:

• Uses the received power and Signal-to-Noise Ratio (SNR) to calculate the Bit Error Rate (BER).

Visualization:

• Outputs results in a detailed table and generates a logarithmic BER vs. Distance plot.

How It Works

Input Parameters:

• The script allows users to customize key parameters such as transmitter power, wavelengths, link distances, and weather conditions.

Loss Calculations:

• Computes the total loss as a sum of atmospheric attenuation, beam divergence, turbulence, and pointing error losses.

Performance Metrics:

• Calculates the received power (PrxP_{\text{rx}}Prx​) and BER for each scenario.

Outputs

Results Table:

• Displays key metrics for each wavelength, weather condition, and link distance.
• Includes Total Loss (dB), Received Power (dBm), and BER.

BER Plot:

• A logarithmic plot of BER vs. Distance for different weather conditions.