Indoor radio-over-fiber system based on graded-index plastic optical fiber for broadband wireless communication

Author(s):  
Kenta Muramoto ◽  
Azusa Inoue ◽  
Yasuhiro Koike

2007 ◽  
Vol 25 (11) ◽  
pp. 3419-3427 ◽  
Author(s):  
Hoon Kim ◽  
Jae Hun Cho ◽  
Sangho Kim ◽  
Ki-Uk Song ◽  
Hanlim Lee ◽  
...  






2018 ◽  
Vol 7 (3.4) ◽  
pp. 218 ◽  
Author(s):  
Hussein Ahmed Mahmood ◽  
Riyadh Khlf Ahmed

Fiber Bragg Grating (FBG) is distributed reflector written in short length of optical fiber to reflect specific wavelengths of light and transmit the other components of spectra. By using FBG method in dispersion compensation can boost significantly the system performance. High capacity transmission and low effective cost of Radio over Fiber technique (Rof) are resulted from the combination of the optical communication capacity and the mobility of wireless networks. In this research article, an investigation of radio over fiber transmission for 50 km-long optical fiber operated at 10 Gb/s data rate and modulated under efficient DPSK modulation technique. The effect of Fiber Bragg Grating as chromatic dispersion compensation and channel spacing in WDM on optical communication system is analyzed and evaluated. The system performance is evaluated in terms of eye diagram. The outcomes of our simulation shows that Four unequal spacing channels radio over fiber system with ideal dispersion FBG has the best performance in terms of Q-factor and BER.  



Respuestas ◽  
2018 ◽  
Vol 23 (2) ◽  
pp. 75-88
Author(s):  
Karla Cecilia Puerto López ◽  
Rudy Paolo Báez Parada ◽  
Ángel David Torres Palencia ◽  
Dinael Guevara Ibarra Guevara Ibarra

This article shows the methodology used to evaluate the linear and non-linear effects present in a radio over fiber system (RoF) by employing the multiplexing technique used for dense wave division, the Dense Wavelength Division Multiplexing (DWDM) technique. It is completed with a dissemination of 50 GHz, in accordance to the standards of the International Telecommunication Union (ITU), through a channel speed of 10 Gbps, at an input power in the optical channel of 30mW, for optical fiber stretches of 40km, 60km and 80km. It presents the modeling of the RoF system graphically through a block diagram by means Matlab, a computational tool, whereby each of the stages of the RoF system are implemented using the libraries offered by the ‘simulink’  toolbox of Matlab. As a result, it is obtained that the methodology proposed for the evaluation of the RoF system using the DWDM technique allows for the analysis of linear and non-linear effects; where it is observed that the effects that degrade the signal are proportional to the established distances of the optical fiber and that the optical input power used is optimal for the optical fiber to behave as a non-linear medium.



2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Pradeep R ◽  
Vijayakumar N

AbstractA subcarrier multiplexed radio over fiber (RoF) system using optical single sideband (OSSB) modulation is proposed. OSSB modulation reduces the bandwidth requirements and also combats the radio frequency (RF) power fading issue due to the dispersive effects in optical fiber. Subcarrier multiplexing (SCM) is a technique used to transmit multiple RF signals through the same optical fiber to utilize its large bandwidth. A theoretical analysis showed that OSSB generation with a number of subcarriers can be done by Hilbert transform method employing a single dual drive Mach–Zehnder Modulator (MZM). This technique is very relevant in the emerging 5G standards which require accesses of multiple standards simultaneously (5G, LTE, and Wi-Fi). This paper demonstrates a low cost solution of OSSB-RoF system and more effective utilization of the spectrum. Simulations results showing satisfactory reception of signals up to 50 km.



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