研究目的
To investigate the bit error rate (BER) performance of optical wireless communication (OWC) systems using binary phase shift keying (BPSK) subcarrier intensity modulation (SIM) in non-Kolmogorov turbulent atmosphere.
研究成果
The BER performance of BPSK SIM OWC systems in non-Kolmogorov turbulence improves with higher power law exponent values. Parameters such as larger load resistor, higher photodetector responsivity, smaller bandwidth, larger beam source size, shorter link lengths, lower turbulence structure constant, and lower noise factors contribute to better BER. The results provide insights for designers to optimize OWC systems in non-Kolmogorov environments.
研究不足
The study is limited to weak turbulence conditions (scintillation index less than 1) and assumes a PIN photodetector at the receiver. It does not consider strong turbulence or other types of detectors like APD. The analysis is theoretical and simulation-based, not experimental, so real-world variations and practical constraints may not be fully captured.
1：Experimental Design and Method Selection:
The study uses theoretical modeling and numerical simulations based on the Rytov approximation for weak turbulence conditions. The BER is derived using statistical methods and the extended Huygens-Fresnel principle for beam propagation.
2：Sample Selection and Data Sources:
No specific samples or datasets are used; the analysis is based on mathematical formulations and simulations.
3：List of Experimental Equipment and Materials:
A PIN photodetector is assumed at the receiver, with parameters such as responsivity, load resistor, and noise factors. The propagating beam is Gaussian.
4：Experimental Procedures and Operational Workflow:
The BER is calculated numerically in MATLAB software by integrating the derived equations, varying parameters like power law exponent, load resistor, responsivity, bandwidth, beam source size, turbulence structure constant, and noise factor.
5：Data Analysis Methods:
Numerical integration and simulation in MATLAB are used to compute BER values, with results plotted to analyze trends.
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