A high-speed low-complexity concatenated BCH decoder architecture for 100 Gb/s optical communications

This paper presents a two-iteration concatenated Bose-Chaudhuri-Hocquenghem (BCH) code and its high-speed low-complexity two-parallel decoder architecture for 100 Gb/s optical communications. The proposed architecture features a very high data processing rate as well as excellent error correction capability. A low-complexity syndrome computation architecture and a high-speed dual-processing pipelined simplified inversonless Berlekamp-Massey (Dual-pSiBM) key equation solver architecture were applied to the proposed concatenated BCH decoder with an aim of implementing a high-speed low-complexity decoder architecture. Two-parallel processing allows the decoder to achieve a high data processing rate required for 100 Gb/s optical communication systems. Also, the proposed two-iteration concatenated BCH code structure with block interleaving methods allows the decoder to achieve 8.91dB of net coding gain performance at 10 ^-15 decoder output bit error rate to compensate for serious transmission quality degradation. Thus, it has potential applications in next generation forward error correction schemes for 100 Gb/s optical communications.