Efficient Pre-BPF based Sigma Delta Radio over Fiber System for 5G NR Fronthauls

Hadi, Muhammad Usman; Kausar, Shafaq; Mittal, Isha

doi:10.1109/eurocon52738.2021.9535555

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…There have been various versions of RoF such as analog RoF (A-RoF), 4,5 digital RoF (D-RoF), 6,7 sigma delta RoF (SD-RoF) 8,9 and other variants that have been. Up to an extent, A-RoF links are the uncomplicated and economical solution, however, it suffers from signal nonlinearities.…”

Section: Introductionmentioning

confidence: 99%

Enhancing5Gmulti‐bandlong haul optical fronthaul links performance by magnitude‐selective affine digital predistortion method

Hadi

Soin

Kausar

2022

Micro & Optical Tech Letters

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This paper presents a novel magnitude-selective affine (MSA) based digital predistortion (DPD) method for the performance investigation of multiband 5G new radio (NR) based analog radio over fiber link. The proposed MSA-DPD method is derived from the canonical piecewise linear (CPWL) based model by employing MSA functions, which can result in reduction of the number of multiplication operations and the model complexity. The 5G NR standard at 20 GHz with 50 MHz bandwidth and flexible-waveform signal at 3 GHz with 20 MHz bandwidth is used. A dual drive Mach Zehnder modulator having two distinct RF signals modulates a 1310 nm optical carrier using distributed feedback laser for 22 km of standard single mode fiber. The proposed MSA-DPD method is compared with the CPWL and generalized memory polynomial method. The experimental results are presented in terms of adjacent channel power ratio, error vector magnitude, number of estimated coefficients and multiplications suggesting that MSA-DPD method achieves a better performance as compared to CPWL and GMP models with much lesser complexity meeting the 3GPP Release 17 requirements.

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Section: Introductionmentioning

confidence: 99%

Enhancing5Gmulti‐bandlong haul optical fronthaul links performance by magnitude‐selective affine digital predistortion method

Hadi

Soin

Kausar

2022

Micro & Optical Tech Letters

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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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Efficient Pre-BPF based Sigma Delta Radio over Fiber System for 5G NR Fronthauls

Cited by 2 publications

References 24 publications

Enhancing5Gmulti‐bandlong haul optical fronthaul links performance by magnitude‐selective affine digital predistortion method

Enhancing5Gmulti‐bandlong haul optical fronthaul links performance by magnitude‐selective affine digital predistortion method

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

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