Optical device models for RoF systems

Vinogradova, Irina L.; Voronkova, Anna V.; Meshkov, Ivan K.; Sultanov, Albert Kh.; Abdrakhmanova, Guzel I.; Grakhova, Elizaveta P.; Ishmiyarov, Arsen A.; Yantilina, Liliya Z.; Kutlieva, Gulnaz R.; Kutluyarov, Ruslan V.; Antonov, Vyacheslav

doi:10.1109/sibircon.2017.8109890

Cited by 2 publications

(2 citation statements)

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“…Channel 3 containing 20% of the power is used for the CD of downlink signal . In the first channel, the carrier is intensity modulated (IM) using Mach‐Zehnder Modulator (MZM) . In MZM, the intensity of the carrier wave is modulated with information 1.…”

Section: Principle Of Operationmentioning

confidence: 99%

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Coherent full duplex radio over fiber system with multiple signal transmission

Chandrasenan

Zacharias

2018

Micro & Optical Tech Letters

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In this paper, a cost‐effective and simple full duplex RoF (radio over fiber) system is developed from a simplex coherent RoF. At the transmitter, utilizing the magnitude and phase of the vector carrier, four different information are encoded simultaneously on the carrier light wave. Dividing the total carrier power into two branches, enable the transmitter to modulate two distinct information on each branch. The working of the system is described in two main sections namely uplink section and downlink section. In the first section, encoding of uplink transmitting information and decoding downlink information at the central office (CO) is described. In the second section, modulating downlink transmitting information and demodulating coherently the uplink receiving information at the base station (BS) are described. An algorithm based on fast Fourier transform is described for effectively canceling the phase noise (PN) at the BS. Considering the cost of optical components, the source used to coherently detect the uplinked transmitted information, is again used as the carrier for downlink. Altogether, this system enables to transmit three different information on uplink and are faithfully received at the BS with an average of log(BER) value −23 dB. And for downlink, one information is transmitted and is successfully received at the CO with log(BER) of −9 dB. About 10 dB decrease in log(BER) values was found after the cancellation of PN.

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Section: Principle Of Operationmentioning

confidence: 99%

“…9 In the first channel, the carrier is intensity modulated (IM) using Mach-Zehnder Modulator (MZM). 10 In MZM, the intensity of the carrier wave is modulated with information 1. MZM is biased at the quadrature point so that the resultant output spectrum from MZM contain suppressed even side bands.…”

Section: Uplink Sectionmentioning

confidence: 99%

Coherent full duplex radio over fiber system with multiple signal transmission

Chandrasenan

Zacharias

2018

Micro & Optical Tech Letters

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Design and analysis of full duplex RoF system with efficient phase noise cancellation from a coherent RoF system

Chandrasenan¹,

Zacharias²

2021

Journal of Optical Communications

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A energy efficient and high throughput bi directional radio over fiber (RoF) system is designed and analysed. In order to preserve the phase and the magnitude of the transmitted signals, coherent detection (CD) is employed and hence an optical local oscillator (OLO) source is used. A full duplex system is designed by utilising the same OLO. The phase noise in CD system is logically cancelled using digital signal processing techniques. 10 Gb/s 16-QAM at 5.5 GHz, 10 Gb/s 2-QAM at 2.5 GHz , 5 Gb/s QPSK at 5.5 Ghz and 10 Gb/s 4-QAM at 7.5 GHz are transmitted simultaneously over 25 km optical fiber(OF). It is analysed that any coherent RoF system can be designed to a full duplex system with acceptable log(BER) and error vector magnitude(EVM) values. The minimum values of log(BER) values obtained for 16-QAM, QPSK, 2-QAM and 4-QAM are −10, −8, −16 and −22, respectively.

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Optical device models for RoF systems

Cited by 2 publications

References 1 publication

Coherent full duplex radio over fiber system with multiple signal transmission

Coherent full duplex radio over fiber system with multiple signal transmission

Design and analysis of full duplex RoF system with efficient phase noise cancellation from a coherent RoF system

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