Moment-based estimation for the shape parameters of the Gamma-Gamma atmospheric turbulence model.
Ning Wang,Julian Cheng +1 more
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TLDR
A modified scheme which exploits the relationship between the Gamma-Gamma shape parameters in free-space optical communication and can achieve satisfactory performance for a wide range of turbulence conditions is proposed.Abstract:
We study the parameter estimation problem for the Gamma-Gamma turbulence model for free-space optical communication. An estimation scheme for the shape parameters of the Gamma-Gamma distribution is proposed based on the concept of fractional moments and convex optimization. To improve the estimation performance, we further propose a modified scheme which exploits the relationship between the Gamma-Gamma shape parameters in free-space optical communication. Simulation results reveal that the modified estimation scheme can achieve satisfactory performance for a wide range of turbulence conditions.read more
Citations
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Unified Performance Analysis of Mixed Radio Frequency/Free-Space Optical Dual-Hop Transmission Systems
TL;DR: A unified performance analysis framework of a dual-hop relay system over asymmetric RF/FSO links is presented, which considers the RF link follows generalized κ-μ or η-μ distributions, while the FSO link experiences the gamma-gamma distribution, respectively.
Journal ArticleDOI
Novel approximation of misalignment fading modeled by Beckmann distribution on free-space optical links.
TL;DR: An approximate closed-form probability density function is derived for the composite gamma-gamma (GG) atmospheric turbulence with the pointing error model using the proposed approximation of the Beckmann distribution, which is valid for most practical terrestrial FSO links.
Journal ArticleDOI
Ergodic Capacity Analysis of Free-Space Optical Links With Nonzero Boresight Pointing Errors
TL;DR: A unified capacity analysis of a free-space optical (FSO) link that accounts for nonzero boresight pointing errors and both types of detection techniques (i.e. intensity modulation/direct detection as well as heterodyne detection) is addressed in this work.
Journal ArticleDOI
Subcarrier intensity modulated MIMO optical communications in atmospheric turbulence
Xuegui Song,Julian Cheng +1 more
TL;DR: In this paper, the authors investigated spatial diversity techniques for subcarrier phase-shift keying (PSK)-modulated optical communication links over the Gamma-Gamma channels, and showed that the diversity order of the studied system depends only on the effective number of small-scale cells of the scattering process in the atmosphere.
Journal ArticleDOI
Subcarrier intensity modulated optical wireless communications in atmospheric turbulence with pointing errors
TL;DR: The findings suggest that pointing error compensation is necessary as pointing errors can severely degrade the error rate and outage probability performance of an uncompensated system.
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