DSP-enhanced radio-over-fiber technologies for 5G-and-beyond wired-wireless convergence

Wired-wireless convergence is considered one of the most promising concepts for the access networks in the upcoming beyond-5G era, a notable example being the radio-over-fiber (RoF) technology that delivers broadband wireless data from/to the edge cloud to/from the antenna sites seamlessly. For futu...

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Bibliographic Details
Published inJournal of optical communications and networking Vol. 14; no. 8; pp. 595 - 605
Main Authors Zhu, Paikun, Yoshida, Yuki, Kanno, Atsushi, Kitayama, Ken-ichi
Format Journal Article
LanguageEnglish
Published Piscataway Optica Publishing Group 01.08.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Adaptive optics
Application specific integrated circuits
Bandwidth
Broadband
Convergence
Data converters
Digital signal processing
Field programmable gate arrays
Network latency
Optical modulation
Optical pulses
Optical receivers
Power consumption
Power demand
Qualitative analysis
Radio
Wireless communication
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Summary:Wired-wireless convergence is considered one of the most promising concepts for the access networks in the upcoming beyond-5G era, a notable example being the radio-over-fiber (RoF) technology that delivers broadband wireless data from/to the edge cloud to/from the antenna sites seamlessly. For future radio access, the capacity, latency, and fidelity requirements pose great challenges to the RoF schemes. With the advances of field-programmable gate arrays, application specific integrated circuits, and high-speed data converters, in recent years, digital signal processing (DSP) has been able to play an increasingly important role in RoF system/processing. Such an analog-digital coordinated scheme, namely, DSP-enhanced RoF, has merits in flexibility, parallelized processing capability, and robustness. This paper aims to provide comprehensive analysis of three major DSP-enhanced RoF techniques, namely, DSP-based intermediate-frequency over fiber, analog-to-digital compression RoF, and delta-sigma RoF. Besides performance, quantitative and qualitative analysis will be presented on latency, power consumption, and system complexity, attributes that are important in practice. In addition, we will discuss the challenges to and opportunities for future research.
ISSN:1943-0620
1943-0639
DOI:10.1364/JOCN.455171