System and method for spectrally efficient transmission of...

H - Electricity – 04 – L

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H04L 27/34 (2006.01) H04J 14/02 (2006.01) H04L 5/06 (2006.01)

Patent

CA 2320762

A system transmits digital data over an optical fiber at high aggregate data rates and high bandwidth efficiencies. The system includes a modulation stage, a frequency division multiplexer, and an optical modulator. The modulation stage QAM-modulates a plurality of incoming digital data channels. The frequency division multiplexer combines the QAM-modulated signals by frequency division multiplexing them into an RF signal. The optical modulator uses the RF signal to modulate an optical carrier for transmission over an optical fiber.

La présente invention concerne un système de transmission de données numériques via une fibre optique à grandes capacités de débits de transmission et à grands rendements de largeurs de bandes. Ce système comprend un étage de modulation, un multiplexeur par répartition en fréquence et un modulateur optique. L'étage de modulation module par mode MAQ plusieurs canaux de données numériques d'arrivée. Le multiplexeur par répartition de fréquence combine les signaux modulés par mode MAQ en les multiplexant par répartition de fréquence en un signal RF. Le modulateur optique utilise ce signal RF pour moduler un porteur optique et effectuer ainsi la transmission via une fibre optique.

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