Single-chip FEC codec LSI using iterative CSOC decoder for 10 Gb/s long-haul optical transmission systems

Abstract

This paper describes a 10 Gb/s throughput FEC (Forward Error Correction) codec LSI for long-haul optical transmission systems. The FEC codec uses concatenated Reed-Solomon (255,239) and Convolutional Self Orthogonal Code (CSOC). In order to improve the error correction capability, the FEC code applies iterative CSOC decoding. As a result, the FEC codec provides 8.0 dB net coding gain at 1E-12 corrected bit error rate with 25% redundancy. Due to the low complexity of CSOC, the codec achieves a low power consumption of 3.59 W and a low gate count of 1.32 Mgates using 0.18 /spl mu/m CMOS technology.