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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 29, Iss. 8 — Aug. 1, 2012
  • pp: 1680–1685

Hybrid pulse position modulation and binary phase shift keying subcarrier intensity modulation for free space optics in a weak and saturated turbulence channel

Monire Faridzadeh, Asghar Gholami, Zabih Ghassemlooy, and Sujan Rajbhandari  »View Author Affiliations


JOSA A, Vol. 29, Issue 8, pp. 1680-1685 (2012)
http://dx.doi.org/10.1364/JOSAA.29.001680


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Abstract

In this paper a hybrid modulation scheme based on pulse position modulation (PPM) and binary phase shift keying subcarrier intensity modulation (BPSK-SIM) schemes for free-space optical communications is proposed. The analytical bit error rate (BER) performance is investigated in weak and saturated turbulence channels and results are verified with the simulation data. Results show that performance of PPM-BPSK-SIM is superior to BPSK-SIM in all turbulence regimes; however, it outperforms 2-PPM for the turbulence variance σ12>0.2. PPM-BPSK-SIM offers a signal-to-noise ratio (SNR) gain of 50 dB in the saturation regime compared to BPSK at a BER of 106. The SNR gain in comparison to PPM improves as the strength of the turbulence level increases.

© 2012 Optical Society of America

OCIS Codes
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.4510) Fiber optics and optical communications : Optical communications
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Fiber Optics and Optical Communications

History
Original Manuscript: February 23, 2012
Revised Manuscript: June 22, 2012
Manuscript Accepted: June 24, 2012
Published: July 25, 2012

Citation
Monire Faridzadeh, Asghar Gholami, Zabih Ghassemlooy, and Sujan Rajbhandari, "Hybrid pulse position modulation and binary phase shift keying subcarrier intensity modulation for free space optics in a weak and saturated turbulence channel," J. Opt. Soc. Am. A 29, 1680-1685 (2012)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-29-8-1680

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