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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. 31, Iss. 3 — Mar. 1, 2014
  • pp: 580–590

Probability density function estimation of laser light scintillation via Bayesian mixtures

Eric X. Wang, Svetlana Avramov-Zamurovic, Richard J. Watkins, Charles Nelson, and Reza Malek-Madani  »View Author Affiliations


JOSA A, Vol. 31, Issue 3, pp. 580-590 (2014)
http://dx.doi.org/10.1364/JOSAA.31.000580


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Abstract

A method for probability density function (PDF) estimation using Bayesian mixtures of weighted gamma distributions, called the Dirichlet process gamma mixture model (DP-GaMM), is presented and applied to the analysis of a laser beam in turbulence. The problem is cast in a Bayesian setting, with the mixture model itself treated as random process. A stick-breaking interpretation of the Dirichlet process is employed as the prior distribution over the random mixture model. The number and underlying parameters of the gamma distribution mixture components as well as the associated mixture weights are learned directly from the data during model inference. A hybrid Metropolis–Hastings and Gibbs sampling parameter inference algorithm is developed and presented in its entirety. Results on several sets of controlled data are shown, and comparisons of PDF estimation fidelity are conducted with favorable results.

© 2014 Optical Society of America

OCIS Codes
(000.5490) General : Probability theory, stochastic processes, and statistics
(010.1300) Atmospheric and oceanic optics : Atmospheric propagation
(010.1330) Atmospheric and oceanic optics : Atmospheric turbulence
(010.7060) Atmospheric and oceanic optics : Turbulence
(290.5930) Scattering : Scintillation
(150.1135) Machine vision : Algorithms

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: August 29, 2013
Manuscript Accepted: November 18, 2013
Published: February 14, 2014

Citation
Eric X. Wang, Svetlana Avramov-Zamurovic, Richard J. Watkins, Charles Nelson, and Reza Malek-Madani, "Probability density function estimation of laser light scintillation via Bayesian mixtures," J. Opt. Soc. Am. A 31, 580-590 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-3-580

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