Patent ID: 7149424

Claim:
A system for improving transmission quality in a communications system, said system comprising: a transmitter having an parameter adjustment module, said transmitter outputting an encoded signal, said parameter adjustment module adjusting a parameter of said encoded signal, said parameter adjustment module comprising a Raman amplifier; a communications link having first and second ends, said first end being connected to said transmitter; a receiver connected to said second end of said communications link, said receiver including an error detection module that determines a bit-error rate for a signal channel over which said encoded signal is transmitted; a feedback path coupling said transmitter and said receiver, said feedback path feeding back said bit-error rate from said error detection module, wherein said parameter adjustment module adjusts said parameter of said encoded signal based on said fed back bit-error rate, said parameter adjustment module adjusting a parameter of said Raman amplifier based on said bit-error rate; and a comparator said comparator using said fed back bit error rate to cause said parameter adjustment module to adjust a parameter of at least one of a plurality of encoded signals via an optimization algorithm adapted to achieve an optimal bit error rate over a plurality of channels, each of said plurality of encoded signals associated with a corresponding channel of said plurality of channels.