FPGA implementation of rate-adaptive spatially coupled LDPC codes suitable for optical communications

Xiaole Sun, Ivan B Djordjevic

Research output: Contribution to journalArticle

1 Scopus citations


In this paper, we propose a unified field-programmable gate array (FPGA) structure for a rate-adaptive forward error correction (FEC) scheme based on spatially coupled (SC) LDPC codes derived from quasi-cyclic (QC) LDPC codes. We described the unified decoder structure in detail and showed that the rate adaptation can be achieved by a controller on-the-fly. By FPGA based emulation, the results show that, with comparable complexity, the SC codes provide larger coding gain. The implemented unified structure can be employed for any template QC-LDPC code to achieve a spatially-coupling based code-rate adaptation scheme.

Original languageEnglish (US)
Pages (from-to)3422-3428
Number of pages7
JournalOptics Express
Issue number3
Publication statusPublished - Feb 4 2019


ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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