@misc{indiciaef4d4bcabc182,
  title = {LDPC-PPM Coding Scheme for Optical Communication},
  author = {Barsoum, Maged and Moision, Bruce and Divsalar, Dariush and Fitz, Michael},
  year = {2009},
  url = {https://ntrs.nasa.gov/citations/20090032153},
  note = {Source identifier: 20090032153}
}