Mitigation of Atmospheric Turbulences Using Mode Division Multiplexing based on Decision Feedback Equalizer for Free Space Optics

Almogahed, Abdullah; Amphawan, Angela; Fazea, Yousef

doi:10.1515/joc-2017-0169

Cited by 19 publications

(7 citation statements)

References 24 publications

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“…The speci c attenuation of the optical link increases as the rain rate R (cms − 1 ) increases, given by following equation 10Where k and are frequency, ambient temperature and drop size dependent parameters. The practical values of the discussed parameters are shown in Table 3 according to severity of the rain conditions [13].…”

Section: Rain Attenuation Prediction Modelmentioning

confidence: 99%

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Performance investigation of 2 × 20 Gb/s MDM-RoFSO link incorporating spiral-phased Hermite–Gaussian modes under strong weather conditions

Sinha

Kumar

2022

J Opt

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This research paper presents a novel high bit rate and spectral e cient 20 Gb/s mode division multiplexed (MDM) radio over free space optical communication (MDM-RoFSO) system. 10 Gb/s MZM/QAM-16 modulated data streams, each from two distinct channels, are transported over two spirals phased Hermite Gaussian (HG) laser modes, HG00 and HG01 respectively. These two HG channels are multiplexed using MDM at a 10 GHz RF signal, ampli ed and transmitted over the atmospheric link at an optical wavelength of 1550 nm. The proposed MDM-RoFSO system is simulated for MZM modulation over two distinct HG modes in clear sky, dense haze, dense fog, and strong rain weather conditions. The performance of the system is evaluated using performance metrics such as BER, eye diagram, Q factor, and link transmission range. The simulation results show that the HG00 mode is more robust and the extended transmission range is achieved from (7 to 24.4) km for (24.4 to 2.98) Q factor for clear sky to strong rain conditions. This transmission range is further extended by the factor of (2.9 to 1.7) km when the QAM-16 modulation is incorporated in composite (HG00 + HG01) mode and then transmitted in similar weather conditions for the acceptable BER of < 10 − 5 . Finally, the simulation results con rm that the QAM-16 modulated composite HG mode is able to mitigate the atmospheric weather conditions and travel a longer transmission distance compared to individual HG mode transmission.

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Section: Rain Attenuation Prediction Modelmentioning

confidence: 99%

“…Ref- [9] Ref- [10] Ref- [11] Ref- [12] Ref- [13] Proposed [9][10][11][12][13] have implemented low data rates using conventional modulation methods. Except for ref.…”

Section: Parametersmentioning

confidence: 99%

Performance investigation of 2 × 20 Gb/s MDM-RoFSO link incorporating spiral-phased Hermite–Gaussian modes under strong weather conditions

Sinha

Kumar

2022

J Opt

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“…It is well known that FSO systems have several pros, such as easy and fast deployment, full-duplex transmission, high transmission security, bandwidth, scalability, high bit rates, license-free operation, etc. [11][12][13][14]. The wireless telecommunication system of FSO utilizes a transmission medium of free space to transmit optical data at high bit rates.…”

Section: Optical Code Division Multiple Access (Ocdma)mentioning

confidence: 99%

DWDM over FSO under the effect of different atmospheric attenuations

Maraha

Ameen

Mahmood

et al. 2020

IJEECS

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<p><span>In optical networks, Dense wavelength division multiplexing (DWDM) has been considered as a promising technique to meet the increasing bandwidth demands. It has been used to increase the capacity of long-haul optical transport systems such as free-space optics (FSO) and optical fiber. However, by applying DWDM over the FSO link, different challenges affect the performance system such as clear air, haze and rain atmospheric attenuations. This paper investigates eleven-channel DWDM over FSO based on the electrical linear equalizer that will improve the performance results at the receiver. The channels operate over (1561.42 nm, 1559.79 nm, 1558.17 nm, 1558.55 nm, 1554.94 nm, 1553.33 nm, 1551.72 nm, 1550.12 nm, 1548.51 nm, 1546.92 and 1545.32 nm) wavelengths that have separated based on the traditional International Telecommunication Union (ITU) grid. In the experiments, the system transmits 110 Gbit/s for FSO distances 9500 m, 3000 m, and 2500 m in superbly clear air, haze, and heavy haze atmospheric attenuations, respectively. Over different atmospheric attenuations, we evaluated our system performance using BER, eye diagram and the quality factor (Q-Factor). </span></p>

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“…Z. Zhao et al reported an ultrahigh capacity FSO communication system over strong atmospheric turbulence conditions by incorporating hybridization of OAM multiplexing, polarization multiplexing, and frequency multiplexing [39]. The research works in references [40][41][42][43][44] report the simulative analysis of MDM-based high-capacity radio over fiber (RoF) links.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a 4 × 20-Gbps OFDM-Based FSO Link Incorporating Hybrid W-MDM Techniques

et al. 2021

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Free space optics (FSO) has been recognized as a crucial technique to meet the high-bandwidth requirements in future wireless information transmission links. It provides a feasible solution to the last-mile bottleneck problem due to its merits that include high-speed data transportation and secure and low-latency networks. Due to these merits, FSO is a reliable technology for future health-care and biomedical services like the transmission of biomedical sensor signals. But the main limiting factor in the data transmission employing FSO links is adverse atmospheric weather conditions. This research work reports the designing and simulative evaluation of the performance of a high-speed orthogonal frequency division multiplexing–based free space optics link by incorporating wavelength division multiplexing of two independent frequency channels (193.1 THz and 193.2 THz) along with mode division multiplexing of distinct spatial laser Hermite–Gaussian modes (HG01 and HG03). Four independent 20-Gbps quadrature amplitude-modulated data signals are transported simultaneously under different atmospheric weather conditions using the proposed link. Also, the link performance has been investigated for an increasing beam divergence angle.

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Mitigation of Atmospheric Turbulences Using Mode Division Multiplexing based on Decision Feedback Equalizer for Free Space Optics

Cited by 19 publications

References 24 publications

Performance investigation of 2 × 20 Gb/s MDM-RoFSO link incorporating spiral-phased Hermite–Gaussian modes under strong weather conditions

Performance investigation of 2 × 20 Gb/s MDM-RoFSO link incorporating spiral-phased Hermite–Gaussian modes under strong weather conditions

DWDM over FSO under the effect of different atmospheric attenuations

Performance Evaluation of a 4 × 20-Gbps OFDM-Based FSO Link Incorporating Hybrid W-MDM Techniques

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