50 GHz optical true time delay beamforming in hybrid optical/mm-wave access networks with multi-core optical fiber distribution

Álvaro Morales, Idelfonso Tafur Monroy, Fredrik Nordwall, Tommi Sørensen

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

We propose and experimentally validate an optical true time delay beamforming scheme with straightforward integration into hybrid optical/millimeter (mm)-wave access networks. In the proposed approach, the most complex functions, including the beamforming network, are implemented in a central office, reducing the complexity and cost of remote antenna units. Different cores in a multi-core fiber are used to distribute the modulated signals to high-speed photodetectors acting as heterodyne mixers. The mm-wave carrier frequency is fixed to 50 GHz (VBand), thereby imposing a progressive delay between antenna elements of a few picoseconds. That true time delay is achieved with an accuracy lower than 1 ps and low phase noise.

LanguageEnglish
Article number040603
JournalChinese Optics Letters
Volume16
Issue number4
DOIs
StatePublished - 10 Apr 2018

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beamforming
Beamforming
Millimeter waves
millimeter waves
Optical fibers
Time delay
time lag
antennas
optical fibers
Antennas
carrier frequencies
Phase noise
Photodetectors
photometers
high speed
costs
fibers
Fibers
Costs

Cite this

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50 GHz optical true time delay beamforming in hybrid optical/mm-wave access networks with multi-core optical fiber distribution. / Morales, Álvaro; Monroy, Idelfonso Tafur; Nordwall, Fredrik; Sørensen, Tommi.

In: Chinese Optics Letters, Vol. 16, No. 4, 040603, 10.04.2018.

Research output: Contribution to journalArticleAcademicpeer-review

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