A high-speed radio-over-free-space optics link using wavelength division multiplexing-mode division multiplexing-multibeam technique

Balasaraswathi, M.; Singh, Mehtab; Malhotra, Jyoteesh; Dhasarathan, Vigneswaran

doi:10.1016/j.compeleceng.2020.106779

Cited by 29 publications

(5 citation statements)

References 13 publications

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“…Furthermore, RoFSO systems are cost-effective since the central base station shares the majority of the expensive hardware for signal processing stages such as handoff, coding–decoding, modulation–demodulation, frequency up- and down-conversion, and multiplexing demultiplexing (Balasaraswathi et al 2020 ). However, there are two main challenges facing the RoFSO system desingers, namely, the limitation in the communication capacity due to high distortion associated with combined high radio frequencies of 5G (24–300 GHz) with the optical carrier and the link range limitation accompanied by atmospheric turbulence (Al et al 2020 ; Singh and Malhotra 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Enhancing performance of WDM-RoFSO communication system utilizing dual channel technique for 5G applications

2022

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In this work, the performance of wavelength division multiplexing based radio over free space optics (WDM-RoFSO) communication system is investigated utilizing OptiSystem 0.7 software. Four weather conditions are adopted in this paper, namely, clear, haze, rain and fog with attenuation losses of 0.2 dB/km, 2.3 dB/km, 4.3 dB/km and 8 dB/km, respectively In addition, a high radio frequency of 30 GHz with high bit rate of 160 Gbps is modulated and carried on optical signal for fifth generation (5G) applications. The dual channel technique is employed in order to enhance the performance parameters of proposed WDM-RoFSO communication system. The enhancement in the link range is about; 46.1%, 35%, 29.4% and 25.9% for clear, haze, rain and fog, respectively.

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Section: Introductionmentioning

confidence: 99%

Enhancing performance of WDM-RoFSO communication system utilizing dual channel technique for 5G applications

2022

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“…However, as a wired network till the base stations/RAPs, practical difficulties may arise TELKOMNIKA Telecommun Comput El Control  Performance analysis of WDM MIMO RoFSO links for 5G applications (Tony Jose) 261 in laying the optical fiber cable in certain scenarios. In such circumstances, an alternative version of the RoF termed as radio over free space optics (RoFSO) can be used [12], [13].…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of WDM MIMO RoFSO links for 5G applications

2022

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The soon to be deployed 5G systems are expected to cater an agglomerate of services at profuse data rates wirelessly. Radio over fiber (RoF) networks are the most suitable to implement such systems. In situations where the practical implementation of RoF systems are non-viable, radio over free space optical (RoFSO) links can be employed. The traditional wavelength division multiplexing (WDM) technology can be incorporated to multiply the data rates. However, the link performance may be degraded due to various atmospheric factors. This can be compensated using multiple input multiple output (MIMO) techniques. In this paper, the performance analysis of such a WDM RoFSO link for 5G frequencies is carried out. The work also presents quantitative performance comparison between single input single output (SISO) and MIMO RoFSO links for 5G systems which will be useful for researchers in this area. It is observed that, while WDM provides additional data capacity, it degrades the link performance under adverse weather conditions which can be counterbalanced using MIMO techniques.

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“…The authors demonstrated that DPSK scheme performs the best and reported transmission of two independent 20 Gbit/s DPSK signals modulated by 40 GHz radio frequency signals over 25 km free‐space range using Hermite Gaussian modes. Balasaraswathi et al reported a hybrid wavelength‐SDM (W‐SDM)‐based radio on FSO link using multi‐beam transmission for enhanced link reach performance under adverse climate conditions 16 . The authors reported reliable 160 Gbit/s 4‐QAM transmission carrying 320 GHz radio frequency signals along 2000 m free‐space link under heavy fog conditions using 4‐beam transmission.…”

Section: Introductionmentioning

confidence: 99%

“…The authors reported feasible transportation of 10 independent 10 Gbit/s NRZ‐encoded data signals over 8 km free‐space range with acceptable BER of the link. The incorporation of SDM in FSO links as reported in References 13‐20 increase the information rate of the system, but the intermodal crosstalk losses under turbulent weather conditions reduce the feasibility and transmission reach of such links.…”

Section: Introductionmentioning

confidence: 99%

“…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 2 describes the schematic and principle of PM‐256‐QAM‐based FSO link.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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A high-speed radio-over-free-space optics link using wavelength division multiplexing-mode division multiplexing-multibeam technique

Cited by 29 publications

References 13 publications

Enhancing performance of WDM-RoFSO communication system utilizing dual channel technique for 5G applications

Enhancing performance of WDM-RoFSO communication system utilizing dual channel technique for 5G applications

Performance analysis of WDM MIMO RoFSO links for 5G applications

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

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