Error correction in optical networks by stochastic shaping and symbol rate optimization

摘要

Problem to be solved: to provide an optical transmitter and a transmission method for stochastic shaping and symbol rate optimization.The transmitter portion 600 includes a plurality of distributed channels 604, one of the plurality of FEC encoders 606, and a plurality of symbol mapper 607, each of which is one of the parallel streams generated by the serial / parallel converter A plurality of Nyquist filtering elements 608 and a plurality of frequency shift elements 609.For each subcarrier 1 to N, transmitter portion 600 may perform symbol mapping and Nyquist filtering before frequency shift (FS) is applied.The output of a plurality of processing paths, each including binary data representing various code words, is coupled by a single subcarrier multiplexer 605 using subcarrier multiplexing for transmission to an optical receiver on the optical transmission.[Orig] Figure 6A