TRANSMISIÓN INALÁMBRICA DE SEÑALES MEDIANTE EL ESPECTRO DE LUZ VISIBLE
Keywords:
Comunicación por Luz Visible, Espectro Electromagnético, Radiofrecuencia, LED, Ancho de BandaAbstract
Se presenta el desarrollo de un prototipo de comunicación inalámbrica de señales mediante el uso del espectro de luz visible con un ancho de banda de 5 MHz (aproximadamente 80 Mbps) y una distancia de 15 cm, el sistema desarrollado permite la transmisión de señales de audio & video de forma inalámbrica mediante un LED (luz blanca). La luz que emite un diodo emisor, se encuentra dentro del espectro electromagnético de luz visible (400-700 nm.), en este rango espectral, se tiene un potencial de ancho de banda de aproximadamente 322 THz, mucho mayor al que se usa en la transmisión de datos inalámbricos mediante ondas electromagnéticas de radio frecuencia (5 MHz para la tecnología 3G). Se instalaron todos los componentes electrónicos en placas impresas dentro de armazones para su uso de forma sencilla. El sistema funciona con fuentes de voltaje simétricas de +9, -9 voltios. El diseño final consta de un transmisor y un receptor de video. El sistema permite variar la intensidad del LED y de esta forma aumentar o reducir la distancia de transmisión; asimismo, es posible regular la ganancia tanto en el transmisor como en el receptor y, por último, se tiene una etapa sumadora y restadora en el transmisor y receptor, respectivamente, para efectivizar la calidad de transmisión de la señal. El sistema tiene un costo menor en un 80% en comparación con sistemas de transmisión de señales por luz visible comerciales.Downloads
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