M-QAM signal transmission at the photonically generated K-band over thermal-induced turbulent FSO links with different turbulence distributions
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F20%3A00341414" target="_blank" >RIV/68407700:21230/20:00341414 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1364/AO.390103" target="_blank" >https://doi.org/10.1364/AO.390103</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/AO.390103" target="_blank" >10.1364/AO.390103</a>
Alternative languages
Result language
angličtina
Original language name
M-QAM signal transmission at the photonically generated K-band over thermal-induced turbulent FSO links with different turbulence distributions
Original language description
We present a theoretical and experimental study on the impact of different thermal-induced free-space turbulence distributions on the M–quadrature amplitude modulation (M-QAM) signal transmission in radio frequency K-band over hybrid optical links of standard single mode fiber (SSMF) and free-space optics (FSO). Frequency multiplication using an external intensity modulator biased at the null transmission point has been employed to photonically generate radio signals at a frequency of 25 GHz , included for the frequency bands for fifth-generation (5G) mobile networks. Moreover, extensive simulations have been performed for 10Gb/s with 4-, 16-, and 64-QAM over 5 km of SSMF and 500 m long FSO channels under scenarios with different turbulence levels and distributions. Proof-of-concept experiments have been conducted for 20 MHz with 4- and 64-QAM over 5 km of SSMF and 2 m long FSO channels under turbulence conditions. Both theoretical and experimental systems have been analyzed in terms of error vector magnitude (EVM) performance showing feasible transmission over the hybrid links in the received optical power range. Non-uniform turbulence distributions are shown to have a different impact on M-QAM modulation formats, i.e., turbulence distributions with higher strength in the middle of the FSO link reveal a 1.9 dB penalty when using 64-QAM signals compared to a 1.3 dB penalty using 4-QAM signals, whereas higher penalties have been measured when 4-QAM format is transmitted over turbulence distributions with larger magnitude in the second half of the FSO link. The results have been validated by theoretical predictions and lead to practical consequences on future networks’ deployment.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20202 - Communication engineering and systems
Result continuities
Project
<a href="/en/project/FV30427" target="_blank" >FV30427: Radio-optical transmission terminal for 5G networks</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Optics
ISSN
1559-128X
e-ISSN
2155-3165
Volume of the periodical
59
Issue of the periodical within the volume
16
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
4997-5005
UT code for WoS article
000537892700032
EID of the result in the Scopus database
2-s2.0-85085843402