Patent ID: 8555132

Claim:
An apparatus comprising: an input configured to receive a stream of digital symbols; a transmitter reorder circuit electrically connected to the input comprising: an interleaver configured to rearrange one or more of the digital symbols in a non-contiguous manner, a scrambler configured to exchange a position of a plurality of the digital symbols output by the interleaver with a position of other symbols output by the interleaver in accordance with a link pattern in order to generate a reordered digital stream comprising an irregular permutation of exchanged digital symbols that disturbs a re-arrangement regularity introduced by the interleaver and that is useable for effective separation of burst errors at an optical receiver, 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 scrambler with a different link pattern at a selected number of clock cycles for use by the scrambler to exchange the position of a plurality of the digital symbols with the position of the other digital symbols; and an output connected to the transmitter reorder circuit configured to output the reordered digital stream to an optical transmitter circuit for transmission to the optical receiver.