Method and apparatus to compensate for differential...

Details Method and apparatus to compensate for differential... Method and apparatus to compensate for differential...

H - Electricity

04

B

H04B 10/18 (2006.01) H04J 14/00 (2006.01) H04Q 11/00 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2138828

Look-ahead control techniques and a variable attenuator are used to solve the known problem of differential attenuation of photonic intensities between time slots are delayed differently in delay paths that have different losses which optical time slot interchangers have. The result of the look-ahead control techniques and variable attenuator is a data frame in which the widely varying photonic intensities are equalized to a substantially similar level, thereby greatly reducing the bit error rate of the downstream receiver/demodulator.

Des techniques de commande par anticipation et un atténuateur variable sont utilisés pour résoudre le problème connu de l'atténuation différentielle des intensités photoniques entre des créneaux temporels qui sont retardés différemment dans des trajets à retard dont l'affaiblissement diffère de celui d'interchangeurs de créneaux temporels optiques. On obtient ainsi une trame de données dans laquelle les intensités photoniques très diversifiées sont égalisées essentiellement au même niveau, ce qui réduit grandement le taux d'erreurs sur les bits du récepteur/démodulateur d'aval.

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