International Journal of Computer Applications |
Foundation of Computer Science (FCS), NY, USA |
Volume 133 - Number 12 |
Year of Publication: 2016 |
Authors: Vimala Reddy, Lochan Jolly |
10.5120/ijca2016908074 |
Vimala Reddy, Lochan Jolly . Simulation and Analysis of Radio over Fiber (RoF) Systems using Frequency Up-Conversion Technique. International Journal of Computer Applications. 133, 12 ( January 2016), 36-43. DOI=10.5120/ijca2016908074
Radio-over-Fiber (RoF) technology is an integration of microwave and optical networks [1]. RoF technology uses optical fiber as a backend technology due to the enormous advantages offered by it. SCM-WDM RoF systems (Sub-carrier based Wavelength division multiplexing RoF system) improves spectral efficiency with high dispersion tolerance [7]. The data to be transmitted is electrically modulated with an IF (Intermediate frequency)or a RF (Radio frequency) carrier and electrically multiplexed using a multiplexer these signals are further optically modulated using an optical modulator and multiplexed using WDM to exploit the high bandwidth offered by the optical fiber. A comparison between IF over fiber and RF over has been analyzed in terms of quality factor and BER (Bit error rate) in a RoF system. In which the IF over fiber shows better performance than RF over fiber in terms of BER and Quality factor. IF signals are up-converted using HBT (Hetero-junction bipolar transistor) electronic mixer in the remote antenna units to the RF frequencies with the help of LO (local oscillator) and transmitted wirelessly [27].