Publicado

2014-11-01

Analytical model of signal generation for radio over fiber systems

Modelo analítico de generación de señales para sistemas radio sobre fibra

DOI:

https://doi.org/10.15446/dyna.v81n188.39715

Palabras clave:

microwave photonics, modulation depth, optical modulation, radio over fiber (en)
fotónica de microondas, índice de modulación, modulación óptica, radio sobre fibra (es)

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Autores/as

  • Gustavo Adolfo Puerto-Leguizamón Universidad Distrital Francisco José de Caldas - Facultad de Ingeniería
  • Carlos Arturo Suárez-Fajardo Universidad Distrital Francisco José de Caldas - Facultad de Ingeniería
This paper presents an analytical model that describes the elements involved in the signal generation feasible to be used in radio over fiber systems for the transport of information. In these systems, the radio frequency carriers are conveyed as optical subcarriers over an optical fiber link in a point-to-point or point-to-multipoint connectivity paradigm. The model is based on the definition of both the electrical field and power at the output of the optical modulator for baseband and radiofrequency modulated signals. By modeling the electrical field, it was found a trade-off between the modulation depths of both signals; as well as the their optimum value in order to assure a good signal quality in reception.
Este artículo presenta un modelo analítico que describe los elementos involucrados en la generación de señales proclives de ser usadas en sistemas de radio sobre fibra para el transporte de información. En estos sistemas las portadoras de radiofrecuencia se transportan como subportadoras de canal óptico sobre un enlace de fibra óptica en conexiones punto-punto o punto-multipunto. El presente modelo tiene como base fundamental la definición del campo eléctrico y potencia a la salida del modulador óptico que conjuga una señal modulada en banda base y una señal de radiofrecuencia en cualquier banda. Mediante modelado de la función de campo se encuentra que los índices de modulación presentan una fuerte dependencia entre si y se obtiene su valor óptimo a fin de garantizar una buena calidad para ambas señales en el receptor.

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