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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 20 — Sep. 28, 2009
  • pp: 18250–18262

On the communication over strong atmospheric turbulence channels by adaptive modulation and coding

Ivan B. Djordjevic and Goran T. Djordjevic  »View Author Affiliations


Optics Express, Vol. 17, Issue 20, pp. 18250-18262 (2009)
http://dx.doi.org/10.1364/OE.17.018250


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Abstract

The free-space optical (FSO) communications can provide any connectivity need at high-speed. However, an optical wave propagating through the atmosphere experiences the variation in amplitude and phase due to scintillation. To enable high-speed communication over strong atmospheric turbulence channels, we propose to transmit the encoded sequence over both FSO and wireless channels, feedback channel state information of both channels by RF-feedback, and adapt powers and rates so that total channel capacity is maximized. The optimum power adaptation policy maximizing total channel capacity is derived. We show significant spectral efficiency performance improvement by employing this approach. We further show that deep fades in the order 35 dB and above can be tolerated by proposed hybrid communication scheme.

© 2009 OSA

OCIS Codes
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(060.4080) Fiber optics and optical communications : Modulation
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: July 6, 2009
Revised Manuscript: August 28, 2009
Manuscript Accepted: September 10, 2009
Published: September 25, 2009

Citation
Ivan B. Djordjevic and Goran T. Djordjevic, "On the communication over strong atmospheric turbulence channels by adaptive modulation and coding," Opt. Express 17, 18250-18262 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-20-18250


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References

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