A novel super-FEC code based on concatenated code for high-speed long-haul optical communication systems

• Published in: Optics communications 2007-05, Vol.273 (2), p.421-427
• Main Authors: Yuan, Jianguo, Ye, Wenwei, Jiang, Ze, Mao, Youju, Wang, Wei
• Format: Article
• Language: English
• Subjects: Applied sciences; Concatenated code; Exact sciences and technology; Net coding gain; Optical communication systems; Optical telecommunications; Super forward error correction; Telecommunications; Telecommunications and information theory
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2007.01.047

The structures of the novel super forward error correction (Super-FEC) code type based on the concatenated code for high-speed long-haul optical communication systems are studied in this paper. The Reed–Solomon (RS) (255, 239) + Bose–Chaudhuri–Hocguenghem (BCH) (1023, 963) concatenated code is presented after the characteristics of the concatenated code and the two Super-FEC code type presented in ITU-T G.975.1 have theoretically been analyzed, the simulation result shows that this novel code type, compared with the RS (255, 239) + convolutional-self-orthogonal-code (CSOC) ( k 0/ n 0 = 6/7, J = 8) code in ITU-T G.975.1, has a lower redundancy and better error-correction capabilities, and its net coding gain (NCG) at the third iteration is 0.57 dB more than that of RS (255, 239) + CSOC ( k 0/ n 0 = 6/7, J = 8) code in ITU-T G.975.1 at the third iteration for the bit error rate (BER) of 10 −12. Therefore, the novel code type can better be used in long-haul, larger capacity and higher bit-rate optical communication systems. Furthermore, the design and implementation of the novel concatenated code type are also discussed.