Results 31 to 40 of about 2,420,038 (307)
Experimental verification of the limits of optical channel intensity reciprocity [PDF]
, 2012 Optical data links through the atmosphere suffer from turbulence-induced signal scintillation. In a coaxially-symmetric bidirectional link scenario, the variations of the axial intensities at both ends are correlated.
Cowley, William +7 more
core +1 more source
Challenges for optical turbulence characterization and prediction at optical communication sites [PDF]
, 2023 editorial reviewedModelling of atmospheric optical turbulence has been of interest in astronomy for several decades, e.g. for site characterization and flexible scheduling.
Orban De Xivry, Gilles +4 more
core +1 more source
International Journal of Optics, 2016 This paper investigates the modulation transfer function of a Gaussian beam propagating through a horizontal path in weak-fluctuation non-Kolmogorov turbulence. Mathematical expressions are obtained based on the generalized modified atmospheric spectrum,
Chao Gao, Xiaofeng Li
doaj +1 more source
Alamouti-Type STBC for Atmospheric Optical Communication Using Coherent Detection
IEEE Photonics Journal, 2014 Alamouti-type space-time block coding is studied for optical wireless communication systems using coherent detection over atmospheric turbulence channels.
Mingbo Niu +2 more
doaj +1 more source
Remote Sensing, 2022 It is very useful for adaptive optics (AO) systems to have appropriate knowledge of optical turbulence. However, due to the limitations of space and time, it is difficult to obtain turbulence parameters, especially in the far sea area. In this paper, the
Manman Xu +3 more
doaj +1 more source
Free-space optical communication employing subcarrier modulation and spatial diversity in atmospheric turbulence channel [PDF]
, 2008 An expression for the bit error rate of a multiple subcarrier intensity-modulated atmospheric optical communication system employing spatial diversity is derived. Spatial diversity is used to mitigate scintillation caused by atmospheric turbulence, which
Ghassemlooy, Zabih +9 more
core +1 more source
32 Gbps QPSK Optical Communication Technology Based on a New Equalizer in Atmospheric Turbulence
IEEE Access, 2021 In this paper, cascaded least mean square-least mean square (LMS-LMS) adaptive equalization scheme is proposed based on fiber coupling system, in order to improve the transmission performance of quadrature phase shift keying (QPSK) modulated optical ...
Binyu Li +3 more
doaj +1 more source
Experimental study of bit error rate of free space optics communications in laboratory controlled turbulence [PDF]
, 2010 This paper reports experimental results for the performance of an free space optical (FSO) communication link employing different modulation schemes under the influence of the atmospheric scintillation.
Z. Ghassemlooy +13 more
core +1 more source
IEEE Photonics Journal, 2023 In fiber-based optical receivers such as coherent receiver, the optical signal reaching the receiver's aperture is coupled to the optical fiber through a set of lenses.
Woohyeon Moon, Hoon Kim
doaj +1 more source
Free space optical system performance for a Gaussian beam propagating through non Kolmogorov weak turbulence [PDF]
, 2009 Atmospheric turbulence has been described for many years by Kolmogorov's power spectral density model because of its simplicity. Unfortunately several experiments have been reported recently that show Kolmogorov theory is sometimes incomplete to describe
LARRY C. ANDREWS +6 more
core +1 more source