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Analog laser predistortion for multiservice radio-over-fiber systems
Journal of Lightwave Technology, 2003We have developed some low-cost predistortion circuits to compensate second- and third-order laser distortions in multiservice radio-over-fiber industrial systems. Depending on the predistorter configuration implemented, average reductions of 10-15 dB and of 8-10 dB have been observed in the laser second- and third-order distortions, respectively ...
ROSELLI, Luca +6 more
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60 GHz Analog Radio-Over-Fiber Fronthaul Investigations
Journal of Lightwave Technology, 2017Analog radio-over-fiber fronthaul links operating at millimeter-wave frequency band have the potential to offer high bandwidth and high data rate to cater for future 5G mobile communications. In this paper, we propose and investigate two schemes to generate 60.25 GHz millimeter-wave signals based on a variation of optical single sideband (OSSB) and ...
Yu Tian +3 more
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Analog Radio-over-Fiber 5G Fronthaul Systems: blueSPACE and 5G-PHOS Projects Convergence
2019 European Conference on Networks and Communications (EuCNC), 2019The fifth generation (5G) mobile systems can be considered the way to ubiquitous Internet, pervasive computing paradigm, and a revolution in industries like automotive, media and entertainment, and eHealth. New 5G fronthaul systems based on centralized radio access networks will eventually use technology enablers such as reconfigurable optical add-drop
Raddo, Thiago R. +5 more
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Analog Pre-Distortion Circuit for Radio Over Fiber Transmission
IEEE Photonics Technology Letters, 2016This letter presents a novel analog predistortion circuit based on two Schottky diodes that can suppress both the third- and fifth-order nonlinear distortions simultaneously. This circuit is simple, of low cost, and of low power consumption. The predistortion circuit is verified in two radio over fiber (RoF) transmission systems.
Xiupu Zhang +4 more
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Analog radio-over-fiber solutions in support of 5G
2018 International Conference on Optical Network Design and Modeling (ONDM), 2018We introduce Centralized (C-RAN) architectures combined with analog optical transport schemes to realize high-speed lanes between BBU pool and RRHs. The DSP-enabled architecture relies on the use of a powerful digital engine supporting data plane functions for both fiber-wireless parts.
Apostolopoulos, D. +5 more
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Linearized Electro-Optical Modulation for Analog Radio over Fiber
Fiber and Integrated Optics, 2018ABSTRACTIntermodulation distortion (IMD) in Analog Radio-over-Fiber (a-RoF) poses a severe limitation to achievable error-free transmission. In this work, an optical feed-forward linearization scheme is presented and compared to an electrical pre-distortion solution.
Luis Ernesto Ynoquio Herrera +4 more
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Analog Radio-over-Fiber Based Mobile Fronthaul Toward Beyond-5G Era
2020 International Topical Meeting on Microwave Photonics (MWP), 2020This paper describes the background, motivation, approach and experimental results of our research and development of mobile fronthaul based on analog radio-over-fiber and related optical transmission technique. Future evolution scenario toward Beyond-5G era is also discussed.
Kosuke Nishimura +4 more
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Spin-VCSELs for analog radio-over-fiber systems in 5G and beyond
Spintronics XIV, 2021We investigate the applicability of spin-controlled vertical-cavity surface-emitting lasers (spin-VCSELs) for optical transmitters in analog radio-over-fiber systems by using spin-flip rate equations. In addition to the current modulation for generating orthogonal frequency division multiplexing (OFDM) signals, we use the spin polarization modulation ...
Nobuhide Yokota +2 more
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Novel broadband analog predistortion circuit for radio-over-fiber systems
2015 IEEE MTT-S International Microwave Symposium, 2015A novel broadband analog predistortion circuit (PDC) is designed to linearize radio-over-fiber (RoF) systems. Dual Schottky diode is used as predistorter. The PDC with high bandwidth and small dimension is achieved by removing quarter-wavelength transformers and power dividers.
Ran Zhu +4 more
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Linearization techniques for electro-optical modulation in analog radio over fiber
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC), 2017Analog Radio-over-Fiber (a-RoF) has gained increasing attention in the context of next-generation optical networks due to its spectral efficiency and lower deployment cost. However, electro-optical conversion of the information signal is delicate since the non-linear characteristic of the electro-optical modulator's transfer function causes inter ...
L.E. Ynoquio Herrera +4 more
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