Investigation of the figure of merit to 256QAM FSO link for the next-generation terrestrial network
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Ajay Kumar Vyas
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Santosh Kumar
Abstract
Free space optical communication (FSO) has become an emerging broadband network. Even with the potential advantages of FSO technology, atmospheric turbulence, cloud-induced fading, and other environmental conditions such as fog, aerosol, temperature changes, storms, heavy rain, aiming inaccuracy, and scintillation reduce the performance of the faithful transmission. This article presented the 256QAM-FSO link, investigated the effect of different weather conditions on the received signals, and summarized bit error rate, error vector magnitude, symbol error rate (SER), power spectral density, and signal-to-noise ratio, and constellation diagram with and without atmosphere turbulence scenarios. The power spectral density of the output signal is a maximum of 11.61 dBm in no turbulence and a minimum of −72.80 dBm for heavy rain conditions to noise ratio degraded in the worst case of heavy rain 0.01 dB and achieved 18.57 dB in the best case of no turbulence, whereas SNR is obtained 9.37 dB in case of fog. Error vector magnitude suffers more from the haze condition, and SER varies from 0.70 to 0.85. The maximum bit error rate obtained for heavy rain is 5,432. With the advanced modulation scheme, the 256QAM-FSO link will provide wide bandwidth, which is helpful for outdoor and indoor services, terrestrial transmission, mile solutions, and so on.
Acknowledgments
The authors would like to express their gratitude to Optiwave Corporation, Canada. They also acknowledge President and Provost Adani University for their support and facility.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: Conceptualization, Data curation, Formal analysis, Investigation Methodology, and Resources are done by Ajay Vyas, and visualization and writing – original draft and writing – by both authors.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The authors declare that they have no known competing financial interests or personal relationships that could have influenced the work reported in this paper.
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Research funding: None.
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Data availability: Available of the reasonable request.
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