LDPC-coded optical coherent state quantum communications

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


The problem of communication using optical coherent quantum states, in the presence of background radiation, is considered. Two modulation formats are studied, ON-OFF keying (OOK) and M-ary pulse-position modulation (PPM). The bit-error-rate performance improvement due to low-density parity-check coding is reported. For OOK, it is assumed that the coherent state signal has a random phase. For an average number of noise photons N=0.1, the required number of signal photons per information bit is six in the case of coded quantum OOK. For the same level of noise (N=0.1) and assuming that signal phase is known, coded 16-ary PPM requires only 1.21 of signal photons per information bit.

Original languageEnglish (US)
Pages (from-to)2006-2008
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number24
StatePublished - Dec 15 2007


  • Coherent states
  • Low-density parity-check (LDPC) codes
  • Optical communications
  • Quantum receiver

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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