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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 23 — Nov. 9, 2009
  • pp: 20721–20726

Average BER analysis of SCM-based free-space optical systems by considering the effect of IM3 with OSSB signals under turbulence channels

Wansu Lim, Tae-Sik Cho, Changho Yun, and Kiseon Kim  »View Author Affiliations


Optics Express, Vol. 17, Issue 23, pp. 20721-20726 (2009)
http://dx.doi.org/10.1364/OE.17.020721


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Abstract

In this paper, we derive the average bit error rate (BER) of subcarrier multiplexing (SCM)-based free space optics (FSO) systems using a dual-drive Mach-Zehnder modulator (DD-MZM) for optical single-sideband (OSSB) signals under atmospheric turbulence channels. In particular, we consider the third-order intermodulation (IM3), a significant performance degradation factor, in the case of high input signal power systems. The derived average BER, as a function of the input signal power and the scintillation index, is employed to determine the optimum number of SCM users upon the designing FSO systems. For instance, when the user number doubles, the input signal power decreases by almost 2 dBm under the log-normal and exponential turbulence channels at a given average BER.

© 2009 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(060.4510) Fiber optics and optical communications : Optical communications

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: August 5, 2009
Revised Manuscript: October 8, 2009
Manuscript Accepted: October 22, 2009
Published: October 27, 2009

Citation
Wansu Lim, Tae-Sik Cho, Changho Yun, and Kiseon Kim, "Average BER analysis of SCM-based free-space optical systems by considering the effect of IM3 with OSSB signals under turbulence channels," Opt. Express 17, 20721-20726 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-23-20721


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References

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