Patent ID: 8874988

Claim:
An apparatus comprising: an input configured to receive a reordered digital stream from an optical receiver circuit; an equalizer electrically connected to the input configured to reduce inter-symbol interference in the received reordered digital stream to produce a designated received reordered symbol stream; an error decorrelator electrically connected to the equalizer comprising: a descrambler configured to exchange a position of a plurality of digital symbols in the designated received reordered symbol stream with a position of other digital symbols in the designated received reordered symbol stream in accordance with a link pattern in order to remove from the designated received reordered symbol stream an irregular permutation of exchanged digital symbols, wherein the irregular permutation is useable for effective separation of burst errors and disturbed a re-arrangement regularity introduced by an optical transmitter device, and a permutation controller comprising a plurality of pseudo random binary sequence circuits configured to generate the link pattern and configured to regularly provide the descrambler with a different link pattern at a selected number of clock cycles for use by the descrambler to exchange the position of a plurality of the digital symbols with the position of the other digital symbols.