In this paper, the three ameliorated new coding schemes of the Super-FEC (Forward Error Correction) concatenatedcodes
(namely, the inner-outer concatenated-code, the parallel concatenated-code and the successive concatenated-code
with interleaving) are proposed after the development trend of high-rate optical transmission systems and the defects of
the FEC codes in the current optical transmission systems have been analyzed. The system simulation of the inner-outer
concatenated-codes is implemented and the schemes of encoding/decoding the parallel concatenated-codes are proposed.
Furthermore, the two successive concatenated-codes with interleaving of the RS(255,239)+RS(255,239) code and the
RS(255,239)+RS(255,223) code are simulated, and the analyses for the simulation results show that the two successive
concatenated-codes with interleaving, compared with the classic RS (255,239) code and other codes, are a superior code
type with the advantages of the better correction error, moderate redundancy and easy realization. And their net coding
gains (NCG) are respectively 1.5dB, 2.5dB more than that of the classic RS(255,239) code at the BER (Bit Error Rate) of
10-12. At last, based on the ITU-T G.709, the frame format of the new concatenated-code on applying in high-rate optical
transmission systems is proposed and designed, this lays a firm foundation in order to design its hardware in future and
pioneers a direction in its physical application.