Abstract
A comprehensive design is proposed for the free-space optical (FSO) communication system by hybridizing circular polarization division multiplexing (CPDM) with coherent optical orthogonal frequency division multiplexing (CO-OFDM) and its performance is investigated realistically under diverse turbulent weather conditions of Bangladesh. Here, we consider Gamma–Gamma distribution for the turbulent FSO channel model. Moreover, the proposed scheme presents an excellent performance since the CPDM technique not only maximizes the link capacity of the FSO system but also enhances the spectral efficiency of the system. Besides, multipath fading, which is appeared during the FSO transmission, is significantly mitigated by OFDM modulation. The outcomes from the simulation confirm the advantages of the proposed hybrid scheme and also it can serve as a reference for the FSO application even in turbulent weather conditions. Performance analysis of the proposed model is described in terms of the optical power spectrum, optical signal-to-noise ratio, bit error rate, Q factor, constellation diagrams, and eye diagrams.
Acknowledgment
The authors are grateful to the anonymous reviewers for their beneficial advice.
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission. Besides, all the authors contributed equally.
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Research funding: No funding was received from any funding sources.
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Conflict of interest statement: The authors proclaim no conflict of interest.
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Supplementary material
The online version of this article offers supplementary material (https://doi.org/10.1515/joc-2021-0113).
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