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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 16 — Aug. 6, 2007
  • pp: 10026–10032

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

Ivan B. Djordjevic  »View Author Affiliations


Optics Express, Vol. 15, Issue 16, pp. 10026-10032 (2007)
http://dx.doi.org/10.1364/OE.15.010026


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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 bit-error rate performance improvement, over uncoded case, is found.

© 2007 Optical Society of America

OCIS Codes
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: May 21, 2007
Revised Manuscript: July 20, 2007
Manuscript Accepted: July 20, 2007
Published: July 25, 2007

Citation
Ivan B. Djordjevic, "LDPC-coded MIMO optical communication over the atmospheric turbulence channel using Q-ary pulse-position modulation," Opt. Express 15, 10026-10032 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-16-10026


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References

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