H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/148 (2006.01) H04B 10/158 (2006.01)
Patent
CA 2235769
A receiver (R) is disclosed for receiving coded optical signals in an asynchronous optical transmission system using a CDMA method based on periodic spectrum encoding. The receiver (R) has a filter device (Rx) for decoding received signals as well as an optical detector unit (PD). The filter device (Rx) consists of a periodic filter (PRx) and a prefilter (VOR) whose transfer function causes the cosine transform of the optical frequency spectrum of the signal to be limited to a predeterminable range of a tuning curve. This reduces crosstalk between adjacent channels in the tuning range, and increases the maximum permissible number of transmitters.
Récepteur (R) permettant de recevoir des signaux optiques codés dans un système de transmission optique asynchrone à l'aide d'une méthode AMRC fondée sur le codage spectral périodique. Le récepteur (R) est muni d'un dispositif de filtrage (Rx) pour décoder les signaux reçus ainsi que d'un détecteur optique (PD). Le dispositif de filtrage (Rx) consiste en un filtre périodique (PRx) et un préfiltre (VOR) dont la fonction de transfert limite à une gamme prédéterminable d'une courbe d'accord la transformée cosinusoïdale du spectre de fréquences optiques du signal, ce qui réduit la diaphonie entre canaux adjacents dans la gamme d'accord et accroît le nombre maximum permissible d'émetteurs.
Alcatel
Alcatel Alsthom Compagnie Generale D'electricite
Robic
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