Analysis of SISO front-end decoders in IM/DD optical channels with application to turbo code decoding

@article{Hueda2004AnalysisOS,
  title={Analysis of SISO front-end decoders in IM/DD optical channels with application to turbo code decoding},
  author={M. R. Hueda and D. E. Crivelli and H. S. Carrer},
  journal={The Ninth International Conference onCommunications Systems, 2004. ICCS 2004.},
  year={2004},
  pages={552-558}
}
We analyze the log-likelihood ratio (LLR) of the received signal yielded by a soft input/soft output (SISO) front-end decoder, in intensity modulation direct detection (IM/DD) optical channels operating in the presence of amplified spontaneous emission (ASE) noise. We focus on long haul or metro links spanning several hundred kilometers of single mode fibers with optical amplifiers. Unlike in AWGN channels where the LLR is a scaled version of the received sample, our study shows that in IM/DD… CONTINUE READING

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