LDPC-coded MIMO optical communication over the atmospheric turbulence channel

Ivan B Djordjevic, Stojan Denic, Jaime Anguita, Bane V Vasic, Mark A Neifeld

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

In this paper, coded multiple-input-multiple-output (MIMO) communication schemes for data transmission over the optical atmospheric turbulence channels are studied. Two strategies are proposed and compared. The first is based on repetition coding, and the second on space-time (ST) coding. Both approaches employ low-density parity-check (LDPC) codes. The LDPC codes are designed using the concept of pairwise balanced design (PBD), balanced incomplete block design (BIBBD), and block-circulant (array) codes. To improve the spectral efficiency, we employ a bit-interleaved (BI) LDPC-coded modulation based on the pulse amplitude modulation (PAM). A better bit error rate (BER) performance is achieved by the iteration of extrinsic information between a demapper and LDPC decoder. The simulations show that the LDPC-coded MIMO schemes can operate under a strong atmospheric turbulence and at the same time provide excellent coding gains compared with the transmission of uncoded data. To verify the efficiency of the proposed coding schemes, achievable information rates are computed when the turbulence is modeled by a gamma-gamma distribution.

Original languageEnglish (US)
Pages (from-to)478-487
Number of pages10
JournalJournal of Lightwave Technology
Volume26
Issue number5
DOIs
StatePublished - Mar 1 2008

Fingerprint

Atmospheric turbulence
MIMO (control systems)
atmospheric turbulence
Optical communication
optical communication
parity
coding
Pulse amplitude modulation
Bit error rate
Data communication systems
Turbulence
Modulation
Communication
pulse amplitude modulation
decoders
data transmission
bit error rate
iteration
repetition
communication

Keywords

  • Atmospheric turbulence
  • Direct detection
  • Free-space optical (FSO) communications
  • Low-density parity-check (LDPC) codes
  • Space-time (ST) coding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

LDPC-coded MIMO optical communication over the atmospheric turbulence channel. / Djordjevic, Ivan B; Denic, Stojan; Anguita, Jaime; Vasic, Bane V; Neifeld, Mark A.

In: Journal of Lightwave Technology, Vol. 26, No. 5, 01.03.2008, p. 478-487.

Research output: Contribution to journalArticle

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