Results 11 to 20 of about 6,742 (251)

Distributed Massive MIMO via all-Digital Radio Over Fiber [PDF]

2020 54th Asilomar Conference on Signals, Systems, and Computers, 2020
A crucial challenge in the implementation of distributed massive multiple-input multiple-output (MIMO) architectures is to provide phase coherence while, at the same time, limit the complexity of the remote-radio heads (RRHs), which is important for cost-efficient scalability.
Lise Aabel, Giuseppe Durisi, Ibrahim Can Sezgin, Sven Jacobsson, Christian Fager, Mikael Coldrey   +5 more
openaire   +2 more sources

Demonstration of a Hybrid Analog–Digital Transport System Architecture for 5G and Beyond Networks

Applied Sciences, 2022
In future mobile networks, the evolution of optical transport architectures enabling the flexible, scalable interconnection of Baseband Units (BBUs) and Radio Units (RUs) with heterogeneous interfaces is a significant issue.
Konstantina Kanta, Panagiotis Toumasis, Kostas Tokas, Ioannis Stratakos, Elissaios Alexis Papatheofanous, Giannis Giannoulis, Ioanna Mesogiti, Eleni Theodoropoulou, George Lyberopoulos, George Lentaris, Dimitris Apostolopoulos, Dionysis Reisis, Dimitrios Soudris, Hercules Avramopoulos   +13 more
doaj   +1 more source

Digital Radio over Fiber Distribution using Millimetre Wave Bridging [PDF]

Optical Fiber Communication Conference, 2018
This paper demonstrates a novel digital radio-over-fiber system using a millimeter-wave bridge giving access where fiber cannot. The system can transport multiple digitised LTE-compatible signals with high spectral efficiency, low latency, and wide dynamic range.
Shams, Haymen, Li, Tongyun, Renaud, Cyril C, Seeds, Alwyn J, Penty, Richard, Fice, Martyn, White, Ian   +6 more
openaire   +3 more sources

Experimental characterization of Sigma Delta Radio over fiber system for 5G C-RAN downlink

ICT Express, 2020
Radio over Fiber is a promising technology for the 5G Cloud Radio Access Network. We demonstrate experimentally Sigma Delta Radio over Fiber by means of Sigma Delta Modulator (SDM) subsequently replacing expensive digital to analog converters.
Muhammad Usman Hadi, Pier Andrea Traverso, Giovanni Tartarini, Hyun Jung   +3 more
doaj   +1 more source

End-to-End Demonstration of Fiber-Wireless Fronthaul Networks Using a Hybrid Multi-IF-Over-Fiber and Radio-Over-Fiber System

IEEE Photonics Journal, 2021
This paper reports an end-to-end demonstration of a fiber-wireless mobile fronthaul (MFH) network based on hybrid intermediate-frequency-over-fiber (IFoF) and radio-over-fiber (RoF) links using a 28-GHz millimeter-wave (MMW) band.
Hsuan-Yun Kao, Shota Ishimura, Kazuki Tanaka, Kosuke Nishimura, Ryo Inohara   +4 more
doaj   +1 more source

Digitized Radio-over-Fiber Transceivers for SDM/WDM Back-/Front-Haul [PDF]

2019 21st International Conference on Transparent Optical Networks (ICTON), 2019
In this paper we analyze the perspective of digitized radio over fiber (DRoF) fronthaul, showing how to meet the requirements to cope with the future radio access networks (RANs). This entails the introduction of space division multiplexing (SDM) while increasing the flexibility and capacity of the DRoF transceivers.Since the evolution of the DRoF ...
Josep M. Fabrega, Raul Muñoz 0001, Michela Svaluto Moreolo, Laia Nadal, Michael Eiselt, Florian Azendorf, Jaroslaw P. Turkiewicz, P. W. L. van Dijk, Simon Rommel, Idelfonso Tafur Monroy   +9 more
openaire   +4 more sources

Practical Demonstration of 5G NR Transport Over-Fiber System with Convolutional Neural Network

Telecom, 2022
This study describes an experimental realization using digital predistortion (DPD) for a fifth generation (5G) multiband new radio (NR) optical front haul (OFH) based Radio over Fiber (RoF) link.
Muhammad Usman Hadi
doaj   +1 more source

Digitized radio-over-fiber transmission based on probabilistic quantization codeword shaping

Optics Express, 2022
To improve the receiver sensitivity of the digitized radio-over-fiber (DRoF) transmission system, a vector quantization scheme based on probabilistic quantization codeword shaping (PQCS) is proposed. The PQCS performs quantization bits ( QBs ) rematching on the original codebook to optimize ...
Jiongbin Deng, Jia Ye, Zongxin Gan, Wenlin Bai, Lianshan Yan, Wei Pan, Xihua Zou   +6 more
openaire   +2 more sources

Coherent Radio-Over-Fiber and Millimeter-Wave Radio Seamless Transmission System for Resilient Access Networks

IEEE Photonics Journal, 2012
We propose a millimeter-wave (MMW) coherent radio-over-fiber (RoF) transmission system for application to an access network with a direct broadband last-mile wireless connection to an optical fiber network.
A. Kanno, P. T. Dat, T. Kuri, I. Hosako, T. Kawanishi, Y. Yoshida, Y. Yasumura, K. Kitayama   +7 more
doaj   +1 more source

Optical Multilevel Pulse Width Modulation for Analog Mobile Fronthaul

Photonics, 2018
The evolution of radio access networks is towards a centralized architecture (C-RAN), with massive antenna deployments and large radio-frequency bandwidths.
Lorenzo Combi, Alberto Gatto, Pierpaolo Boffi, Umberto Spagnolini, Paola Parolari   +4 more
doaj   +1 more source