VCSEL-Based Radio-Over-G652 Fiber System for Short-/Medium-Range MFH Solutions

Nanni, Jacopo; Polleux, Jean-Luc; Algani, Catherine; Rusticelli, Simone; Perini, Federico; Tartarini, Giovanni

doi:10.1109/jlt.2018.2816242

Cited by 28 publications

(12 citation statements)

References 19 publications

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“…4 (b) vs 10 km in Fig. 6, is also observed due to the higher received power attenuation, in accordance with the results provided in [25]. In all the experimental measurements reported and for link lengths of units of km, the EVM showed negligible impact for PoF signals up to 0.5 W while significantly degraded within a range that could be defined around 1 W. However, it is worth mentioning that beyond 1 W of HPL output power (around at 2 W) EVM results showed a slight improvement in most of the cases considering the different RF power, carrier RF frequency and modulation formats investigated.…”

Section: Evm Characterizationsupporting

confidence: 91%

Optically Powered Radio-Over-Fiber Systems in Support of 5G Cellular Networks and IoT

Al-Zubaidi

López-Cardona

Montero³

et al. 2021

J. Lightwave Technol.

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We propose using power-over-fiber (PoF) in some part of future 5G cellular solutions based on radio access networks considering currently installed front-haul solutions with single mode fiber to optically power communication systems for 5G new radio (NR) data transmission. Simulations addressing design parameters are presented. Radio-over-fiber (RoF) transmission over single mode fiber (SMF) is experimentally implemented and tested for link lengths ranging from 100 m up to 10 km with injected PoF signals up to 2 W. 64QAM, 16QAM and QPSK data traffic of 100 MHz bandwidth are transmitted simultaneously with the PoF signal showing an EVM compliant with 5G NR standard, and up to 0.5 W for 256QAM. EVM of 4.3% is achieved with RF signal of 20 GHz and QPSK modulation format in coexistence with delivering 870 mW of optical power to a photovoltaic cell (PV) after 10 km-long SMF link. Using PoF technology to optically powering remote units and Internet-of-Things (IoT) solutions based on RoF links is also discussed.

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Section: Evm Characterizationsupporting

confidence: 91%

Optically Powered Radio-Over-Fiber Systems in Support of 5G Cellular Networks and IoT

Al-Zubaidi

López-Cardona

Montero³

et al. 2021

J. Lightwave Technol.

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“…With 5G in roll out stage in most part of the developed world, the microwave photonicsbased solutions such as Radio over Fiber (RoF) have a higher significance connecting the BBUs with RRUs [3][4][5] due to advantages such as cost effectiveness; immunity to electromagnetic disturbance, broader bandwidth and increasing the wireless links reach for all type of distances ranging from short to long. There have been various versions of RoF such as Analog Radio over Fiber (A-RoF) [6,7], Digital Radio over Fiber (D-RoF) [8,9], Sigma Delta Radio over Fiber (SD-RoF) [10][11][12] and other variants that have been proposed recently (see Figure 2).…”

Section: Introductionmentioning

confidence: 99%

Experimental Demonstration and Performance Enhancement of 5G NR Multiband Radio over Fiber System Using Optimized Digital Predistortion

et al. 2021

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This paper presents an experimental realization of multiband 5G new radio (NR) optical front haul (OFH) based radio over fiber (RoF) system using digital predistortion (DPD). A novel magnitude-selective affine (MSA) based DPD method is proposed for the complexity reduction and performance enhancement of RoF link followed by its comparison with the canonical piece wise linearization (CPWL), decomposed vector rotation method (DVR) and generalized memory polynomial (GMP) methods. Similarly, a detailed study is shown followed by the implementation proposal of novel neural network (NN) for DPD followed by its comparison with MSA, CPWL, DVR and GMP methods. In the experimental testbed, 5G NR standard at 20 GHz with 50 MHz bandwidth and flexible-waveform signal at 3 GHz with 20 MHz bandwidth is used to cover enhanced mobile broad band and small cells scenarios. A dual drive Mach Zehnder Modulator having two distinct radio frequency signals modulates a 1310 nm optical carrier using distributed feedback laser for 22 km of standard single mode fiber. The experimental results are presented in terms of adjacent channel power ratio (ACPR), error vector magnitude (EVM), number of estimated coefficients and multiplications. The study aims to identify those novel methods such as MSA DPD are a good candidate to deploy in real time scenarios for DPD in comparison to NN based DPD which have a slightly better performance as compared to the proposed MSA method but has a higher complexity levels. Both, proposed methods, MSA and NN are meeting the 3GPP Release 17 requirements.

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“…When we consider short range A-RoF links, the impact of impairments that arises due to concoction of fiber chromatic dispersion and laser frequency chirp are usually negligible. 4,5 Having said that, still, the impact of signal impairments owing to the laser diode and due to photodiode (PD) are significant.…”

Section: Introductionmentioning

confidence: 99%

Enhancing distributed feedback‐standard single mode fiber‐radio over fiber links performance by neural network digital predistortion

Hadi

Murtaza

2021

Micro & Optical Tech Letters

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This letter presents a novel neural network (NN) based digital predistortion (DPD) technique to obliterate the signal impairments and nonlinearities in radio over fiber (RoF) systems. DPD is generally performed with volterra based procedures that utilizes indirect learning architecture (ILA) that can become complex and expensive computationally. The proposed method using NNs evades issues associated with ILA and utilizes a NN to first model the RoF link and then training a NN based predistorter by backpropagating through the RoF NN model. Furthermore, the experimental evaluation is carried out for long term evolution 20-MHz 256-QAM modulation signal using 1310 nm distributed feedback laser, and standard single-mode fiber to establish a comparison between NN based RoF link and volterra based generalized memory polynomial using ILA. The efficacy of the DPD is examined by reporting adjacent channel power ratio, mean square error, and error vector magnitude. The experimental findings imply that NN-DPD convincingly learns the RoF nonlinearities which may not suit a volterra based model, and hence may offer a favorable trade-off in terms of computational overhead and DPD performance.

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VCSEL-Based Radio-Over-G652 Fiber System for Short-/Medium-Range MFH Solutions

Cited by 28 publications

References 19 publications

Optically Powered Radio-Over-Fiber Systems in Support of 5G Cellular Networks and IoT

Optically Powered Radio-Over-Fiber Systems in Support of 5G Cellular Networks and IoT

Experimental Demonstration and Performance Enhancement of 5G NR Multiband Radio over Fiber System Using Optimized Digital Predistortion

Enhancing distributed feedback‐standard single mode fiber‐radio over fiber links performance by neural network digital predistortion

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