High Speed Concatenated Code Codec for Optical Communication Systems

This paper presents a high-speed concatenated code codec architecture based on Reed-Solomon (RS) and eight-parallel Bose-Chaudhuri-Hochquenghem (BCH) for optical communication systems. A high speed eight-parallel BCH (2184,2040) codec has been proposed and the derived structure is optimized based on its property. The concatenated code system can operate at a clock frequency of 312.5 MHz and has a throughput of 2.5 Gb/s for 0.18-mum CMOS technology. The test system based on Xinlinx Sprtan-3 FPGA is implemented. The test results show that the architecture can operate at a clock frequency of 80 MHz and has throughput of 655 Mb/s for the Xilinx Spartan-3 FPGA.