Citation

Ali, Farman and Ullah, Yasir and Roslee, Mardeni and Khan, Irfan Ullah and Md Jizat, Noorlindawaty and Kabir, Fardin (2025) FSO Transmission Framework Employing F-OFDM for Error Probability and Divergence Loss Evaluation in 5G Networks. In: 4th International Conference on Smart Cities, Automation, and Intelligent Computing Systems, ICON-SONICS 2025, 14 October 2025 - 17 October 2025, Hybrid, Malacca.

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Abstract

This paper presents an end-to-end freespace optical (FSO) transmission framework that employs a filtered-OFDM (F-OFDM) transceiver for 5G optical wireless backhaul and access. The architecture integrates an optical fiber front haul with an IM/DD FSO link and models the dominant impairments: atmospheric turbulence, pointing-induced misalignment, geometric divergence, front-end nonlinearities, and cochannel interference under multichannel operation. A composite statistical channel is formulated by coupling turbulence, pointing error, and geometric coupling into the received irradiance, from which closed-form expressions for the cumulative distribution function, outage probability, and error performance are obtained. The transmitter leverages subband filtering to suppress out-of-band leakage and reduce peak-to-average power ratio, thereby improving nonlinear tolerance. The framework is validated through coordinated OptiSystem–MATLAB co-simulation with forward error correction, QPSK/16-QAM mapping, and FFT-based baseband processing. Performance is evaluated using bit error rate, PAPR complementary CDF, divergence loss, error vector magnitude, and outage as a function of SNR threshold across wavelengths, transmit powers, apertures, and ranges. Compared with conventional OFDM and UFMC under identical link budgets, the proposed transceiver consistently exhibits lower PAPR at fixed exceedance probability, reduced BER at practical transmit powers and ranges, and lower outage under degraded visibility, demonstrating improved robustness to turbulence/misalignment and mitigated divergence penalties for high-capacity 5G optical wireless links.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	5G Networks.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions:	Faculty of Artificial Intelligence & Engineering (FAIE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	18 Mar 2026 08:08
Last Modified:	19 Mar 2026 01:24
URII:	http://shdl.mmu.edu.my/id/eprint/15577

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