Performance analysis of 1280 Gbps DWDM – FSO system employing advanced modulation schemes

Sharma, Aanchal; Kaur, Sanmukh

doi:10.1016/j.ijleo.2021.168135

Cited by 25 publications

(3 citation statements)

References 29 publications

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“…The noise values for each signal level are represented by σ 1 and σ 0 which correspond to '1' and '0' transmission probabilities respectively. The relationship between the BER and Q-factor is given as [30]:…”

Section: System Modelmentioning

confidence: 99%

Machine learning based performance estimation of terrestrial Ro-FSO Link

Kaur

Singh²,

Sharma

2023

Phys. Scr.

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In this work, a radio over free-space optical communication (Ro-FSO) link has been examined considering quadrature amplitude modulation (64-QAM) based orthogonal frequency division multiplexing (OFDM) technique for a turbulence channel. The performance of the system has been investigated considering log normal and gamma-gamma atmospheric scintillation models under clear air, rain and fog weather conditions. Artificial neural network (ANN), k-nearest neighbour (KNN), and decision tree (DT) machine learning (ML) techniques have been applied for estimation of quality of received signal in terms of bit error rate BER. ANN model exhibits the highest value of R-squared (R2) of 0.9967 and lowest value of root mean square error (RMSE) of 0.0134 as compared to other ML techniques resulting in the best fit model.

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Section: System Modelmentioning

confidence: 99%

Machine learning based performance estimation of terrestrial Ro-FSO Link

Kaur

Singh²,

Sharma

2023

Phys. Scr.

Self Cite

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“…The EDFA optical amplifier is played a very critical role to overcome the effect of climate turbulences by increasing the amplitude and power of the transmitting signal thus; the signal can travel up to several kilometers without degrading its power. Apart from this advanced modulation techniques such as CSRZ, duo binary return to zero (DRZ), and modified duo binary return to zero (MDRZ) are used for transmitting data with high transmission power [9]. Apart from this (OQPSK) modulated signal offers a flexible hardware platform mainly used in wireless applications such as satellite communication where high data rate transmission is required [2, 5].…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement of Dwdmfso System Under Diverse Weather Conditions With Optimized Modulation Format

Parkash¹,

Banga²,

Kumar³

2023

IJEAST

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This paper is successfully demonstrating simulating comparison and investigation of 48 channels of dense wavelength division multiplexing free space optical (DWDM−FSO) network with a 10 GB/s data rate on each channel separated by 100 GHz frequency spacing under a clear sky, haze and light rain climate conditions. Apart from this, comparison of a series of modulation formats such as non−return to zero (NRZ), return to zero (RZ), carrier suppressed return to zero (CSRZ), Soliton pulse, and offset quadrature phase shift keying (OQPSK) have been performed and optimized the performance of the designed system with best suited modulated system. The performance of the proposed work has been evaluated in terms of bit error rate (BER), quality factor (Q), signal−to−noise ratio (SNR), received signal power and eye diagrams. It has been observed that OQPSK modulated system has shown more robust performance as compared to other line encoding techniques. The minimum simulation work reports for OQPSK modulated system have been recorded with the acceptable performance BER ≤ 10−10, Q ≥ 6 dB at the 2000 meters FSO link range.

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“…The advanced modulated information is optically imposed over two HG orthogonal modes to form a MDM channel. These eight MDM channels are then multiplexed at different infrared wavelengths near 1550 nm by a dense wavelength division multiplexer (DWDM) and ampli ed by an optical boost ampli er (OBA) to improve spectral e ciency and reduce channel attenuation [22][23] [24]. The OBA-EDFA implementation has shown an overall enhancement in FSO link distance and its reliability [25][26].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Hermite Gaussian 8×40 Gb/s DWDM-FSO System using Advance Modulation Schemes

Sinha

Kumar

2022

Preprint

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Transmission of high-speed optical signals across the free space channel is highly dependent on external characteristics such as scintillation and attenuation as a result of atmospheric conditions that are constantly changing. This paper describes the architecture of an 8×40 Gbps dense wavelength division multiplexed (DWDM)-FSO transmission system based on Hermite Gaussian (HG) channels and incorporates various advanced modulation techniques. In addition, the implementation of a spatial mode laser and an optical boost amplifier decreases the effect of degradation caused by atmospheric attenuation and extends the optical link distance. The performance of the proposed system design is investigated for six modulation schemes including 64-QAM, 16-QAM, 4-QAM, 8-PSK, DPSK, and DQPSK modulations in different atmospheric attenuations conditions under a strong Gamma-Gamma (GG) turbulent channel. It is reported that the optical link performance degrades exponentially with an increase in signal to noise ratio (SNR) for the modulation schemes listed above. 4-QAM and DPSK modulations outperform the rest of the modulation methods for low SNR values as the optical link distance increases. The successful signal transmission of 8×40 Gb/s data over the transmission link distance of about 5 km with an acceptable BER level of 10− 6 is achieved.

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Performance analysis of 1280 Gbps DWDM – FSO system employing advanced modulation schemes

Cited by 25 publications

References 29 publications

Machine learning based performance estimation of terrestrial Ro-FSO Link

Machine learning based performance estimation of terrestrial Ro-FSO Link

Performance Enhancement of Dwdmfso System Under Diverse Weather Conditions With Optimized Modulation Format

Performance Analysis of Hermite Gaussian 8×40 Gb/s DWDM-FSO System using Advance Modulation Schemes

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