Performance of 120 Gbps single channel coherent DP-16-QAM in terrestrial FSO link under different weather conditions

Kakati, Dhiman; Arya, Subhash C.

doi:10.1016/j.ijleo.2018.10.035

Cited by 48 publications

(14 citation statements)

References 22 publications

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“…The admissible values of FEC (Forward Error Correction) for BER is ∼10 -3 , and for SNR, it is ∼20 dBm, for which the communication system proves to be working fine. FEC refers to the performance threshold which must be achieved by the system in order to provide end-to-end connectivity for voice and data related services [52,53]. As mentioned in Table 3, the BER and SNR rates of the proposed link are pretty much beyond the FEC threshold limits.…”

Section: Resultsmentioning

confidence: 99%

Developing Cost-Effective and High-Speed 40 Gbps FSO Systems Incorporating Wavelength and Spatial Diversity Techniques

et al. 2021

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Free-space optical (FSO) communication systems are being anticipated to offer promising alternatives to existing radio networks in delivering high-speed data access to end-users. Ease of installation, robust features, and cost-effective operation have been the hallmark of FSO systems, and these features will play an obvious role in deciding the ways in which futuristic smart communication models will operate. Despite these arrays of features, FSO links suffer severe performance degradation due to channel-induced impairments caused by atmospheric effects such as rain, haze, and fog. In this work, we have investigated and compared the performance of 40 Gbps FSO links for different channel conditions ranging from clear weather to severe attenuation by incorporating spatial and wavelength diversity as performance booster techniques. The use of an erbium-doped fiber amplifier (EDFA) with FSO links has also been proposed here. Using performance metrics like bit error rate (BER) and eye patterns, it has been found that the use of EDFA not only helps in compensating for the link losses but also aids in realizing an all-optical processing based last-mile access system. The proposed FSO system will be capable of bridging the existing backbone fiber networks with end-users with minimal changes to the existing hardware regime, thereby proving to be extremely cost-effective in sharp contrast to radio-frequency generations which require major infrastructure overhaul.

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Section: Resultsmentioning

confidence: 99%

Developing Cost-Effective and High-Speed 40 Gbps FSO Systems Incorporating Wavelength and Spatial Diversity Techniques

et al. 2021

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“…The performance improvement of the link in terms of constellation graphs and error vector magnitude (EVM) in the presence of atmospheric effects has been reported in the proposed work. The IQM‐based coherent transceiver and DSP units can practically be implemented on integrated circuits, making the proposed system a cost‐effective FSO solution 34 . Using the proposed link, 160 Gbit/s information is transmitted at 10 Gbaud symbol rate over a single‐frequency optical carrier signal, which is more spectral‐efficient in comparison to recent works reported in References 2‐20.…”

Section: Introductionmentioning

confidence: 90%

Performance analysis of coherent free‐space optics transmission link using in‐phase quadrature modulator‐based polarization multiplexed‐256‐quadrature amplitude modulation

Konda

Velayudham

Venkatesan

2021

Trans Emerging Tel Tech

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A single‐channel high information rate free‐space optics transmission link is presented incorporating in‐phase quadrature modulator‐based polarization multiplexed‐256‐quadarature amplitude modulation scheme. An information rate of 160 Gbit/s with 10 Gbaud symbol rate is achieved for free‐space information transmission. Advanced digital signal processing techniques at the receiver along coherent detection have been used to compensate the losses incurred by the information signal propagating the free‐space media. The transmission performance of the proposed link has been enhanced by using different optical amplifiers, that is, Erbium‐doped fiber amplifier and semiconductor optical amplifier, and their performance has been compared. The link performance is analyzed for required laser line width, launch power requirements, increasing transmission range, increasing beam divergence angle and optical power required at the receiver. Bit error rate and error vector magnitude metrics have been used to analyze the link performance. A maximum transmission of 3.9 km for clear weather atmospheric conditions is achieved. The proposed link has the potential to meet the last‐mile access needs and to provide high‐bandwidth high‐speed information links required for future fifth generation wireless communication and Internet of Things applications.

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“…The comparison of the system performance with conventional techniques reported in literature [26,28,[70][71][72][73][74][75][76][77][78][79][80][81].…”

Section: Table 2 |mentioning

confidence: 99%

Enhanced Performance of the 4 × 20 Gbit/s-40 GHz OFDM-Based RoFSO Transmission Link Incorporating WDM-MDM of Hermite Gaussian and Laguerre Gaussian Modes

Singh¹,

Singh

Grover³

et al. 2022

Front. Phys.

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A 4 × 20 Gbit/s-40 GHz orthogonal frequency-division multiplexing-based radio-on-free-space optics information link, integrating hybrid wavelength- and mode-division multiplexed transmission techniques, is proposed in this paper. Furthermore, an ameliorated detection scheme deploying a square root module after each photo diode at the receiver terminal is proposed to mitigate the adverse performance effects because of nonlinear photodiode characteristics. The presented results show a successful 80 Gbit/s-160 GHz transmission at 3000 and 2700 m under heavy rainy and foggy weather, respectively. The link demonstrates superior performance in terms of maximum range and transmission rate compared to previous works.

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Performance of 120 Gbps single channel coherent DP-16-QAM in terrestrial FSO link under different weather conditions

Cited by 48 publications

References 22 publications

Developing Cost-Effective and High-Speed 40 Gbps FSO Systems Incorporating Wavelength and Spatial Diversity Techniques

Developing Cost-Effective and High-Speed 40 Gbps FSO Systems Incorporating Wavelength and Spatial Diversity Techniques

Performance analysis of coherent free‐space optics transmission link using in‐phase quadrature modulator‐based polarization multiplexed‐256‐quadrature amplitude modulation

Enhanced Performance of the 4 × 20 Gbit/s-40 GHz OFDM-Based RoFSO Transmission Link Incorporating WDM-MDM of Hermite Gaussian and Laguerre Gaussian Modes

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