Abstract

Codes on graphs of interest for next generation forward error correction (FEC) in high-speed optical networks, namely turbo codes and low-density parity-check (LDPC) codes, are described in this invited paper. We describe both binary and nonbinary LDPC codes, their design, and decoding. We also discuss an FPGA implementation of decoders for binary LDPC codes. We then explain how to combine multilevel modulation and channel coding optimally by using coded modulation. Also, we describe an LDPC-coded turbo-equalizer as a candidate for dealing simultaneously with fiber nonlinearities, PMD, and residual chromatic dispersion.

© 2009 IEEE

Multiple component codes based generalized LDPC codes for high-speed optical transport

Ivan B. Djordjevic and Ting Wang
Opt. Express 22(14) 16694-16705 (2014)

FPGA implementation of concatenated non-binary QC-LDPC codes for high-speed optical transport

Ding Zou and Ivan B. Djordjevic
Opt. Express 23(11) 14501-14509 (2015)

Polarization-multiplexed rate-adaptive non-binary-quasi-cyclic-LDPC-coded multilevel modulation with coherent detection for optical transport networks

Murat Arabaci, Ivan B. Djordjevic, Ross Saunders, and Roberto M. Marcoccia
Opt. Express 18(3) 1820-1832 (2010)

Evaluation of four-dimensional nonbinary LDPC-coded modulation for next-generation long-haul optical transport networks

Yequn Zhang, Murat Arabaci, and Ivan B. Djordjevic
Opt. Express 20(8) 9296-9301 (2012)

Run-time reconfigurable adaptive LDPC coding for optical channels

Xiaole Sun, Ding Zou, Zhen Qu, and Ivan B. Djordjevic
Opt. Express 26(22) 29319-29329 (2018)