System for re-establishing the transmission quality of a link including amplifier equipments in the event of failure of one or more amplifier equipments

摘要

A system for re-establishing the transmission quality of a digital information transmission link including amplifier equipments in the event of failure of one or more amplifier equipments includes, associated with at least one of the amplifier equipments, a gain control device for varying the gain of the amplifier equipment in order to compensate for deterioration of the receive signal-to-noise ratio following failure of at least one other amplifier equipment. An error corrector coder at the send end of the link operates on the digital information to be transmitted and an error corrector decoder at the receive end of the link operates on the received digital information. The error corrector code used by the error corrector coder and decoder reduces or eliminate residual errors at the receiving end associated with residual deterioration of the receive signal-to-noise ratio not compensated by varying the gain.