LDPC-coded MIMO optical communication over the atmospheric turbulence channel using Q-ary pulse-position modulation

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43 Scopus citations

Abstract

We describe a coded power-efficient transmission scheme based on repetition MIMO principle suitable for communication over the atmospheric turbulence channel, and determine its channel capacity. The proposed scheme employs the Q-ary pulse-position modulation. We further study how to approach the channel capacity limits using low-density parity-check (LDPC) codes. Component LDPC codes are designed using the concept of pairwise-balanced designs. Contrary to the several recent publications, bit-error rates and channel capacities are reported assuming that p.i.n. photodetectors are used instead of ideal photon-counting receivers. The atmospheric turbulence channel is modeled using the Gamma-Gamma distribution function due to Al-Habash et al. Excellent biterror rate performance improvement, over uncoded case, is found.

Original languageEnglish (US)
Pages (from-to)10026-10032
Number of pages7
JournalOptics Express
Volume15
Issue number16
DOIs
StatePublished - Aug 6 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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