Ondas milimétricas sobre fibra: backhaul para redes móveis de quinta geração

Abstract

The process of standardization of fifth generation mobile networks establishes that these should present high data transfer rates, extreme reliability, good energy efficiency, as well as be economically feasible. For this to be possible, a proposed alternative was the use of carrier frequency in the millimeter wave spectrum range, since the microwave spectrum has been struggling to accommodate the significant increase in data traffic and would not be able to support the expected services for the new generation of mobile networks. However, at the proposed high frequencies, metallic waveguides would limit the quality of the propagated signal. That said the alternative found for the backhaul of the fifth generation mobile networks is the replacement of the metallic wave-guides by optical fibers, using the radio over fiber (ROF) system. In this context, the present work demonstrates, by means of simulations, the impact of the chromatic dispersion and of non-linear effects like self-phase modulation (SPM) and the four wave mixing (FWM) in the optical fibers: standard (STDF), dispersion shifted (DSF), anomalous and normal. After the results, it is clear that the dispersion-shifted fiber is the best option to be used in the backhaul of the fifth generation mobile networks.