On atmospheric optical communications
نویسندگان
چکیده
2014 This paper investigates, more rigorously, the diffraction of a powerful optical carrier propagating in an unguided communication channel (dry atmosphere). Four main relevant topics are considered i) the radial temperature distribution, ii) the average beamwidth parameter, iii) a dimensionless optical distortion figure of merit, and iv) the irradiance tailoring technique as a method to reduce the diffraction caused by refractive effects. Revue Phys. Appl. 19 (1984) 879-888 OCTOBRE 1984, PAGE Classification Physics Abstracts 42.10 42.80 42.60
منابع مشابه
Availability Assessment of Optical Wireless Links
The paper deals with a statistical model of optical wireless links. The model is based on a combination of model of the atmospheric transmission channel at the installation site and the model of optical wireless link in ideal atmosphere. It allows an estimation of link availability based on the knowledge of the dependence of link margin on the transceiver distance for particular parameters of a...
متن کاملModel of Beam Interruptions for Free-Space Optical Systems
The paper deals with a statistical model of beam interruptions for free-space optical (FSO) systems. The model is based on the probability density function of random attenuations and the probability density function of interruption durations. Key-Words: Free Space Optics, Communications, Atmospheric transmission channel
متن کاملPerformance bounds for coded free-space optical communications through atmospheric turbulence channels
Error-control codes can help to mitigate atmospheric turbulence-induced signal fading in free-space optical communication links using intensity modulation/direct detection (IM/DD). Error performance bound analysis can yield simple analytical upper bounds or approximations to the bit-error probability. In this letter, we first derive an upper bound on the pairwise codeword-error probability for ...
متن کاملPartially coherent beam propagation in atmospheric turbulence [invited].
Partially coherent beams hold much promise in free-space optical communications for their resistance to the deleterious effects of atmospheric turbulence. We describe the basic theoretical and computational tools used to investigate these effects, and review the research to date.
متن کاملIndoor Non-directed Optical Wireless Communications - Optimization of the Lambertian Order
For an indoor non-directed line of sight optical wireless communication (NLOS-OWC) system we investigate the optimized Lambertian order (OLO) of light-emitting diodes (LEDs). We firstly derive an expression for the OLO from a conventional Lambertian LED model. Then, we analyze the indoor multi-cell NLOS-OWC channel characteristics including the optical power distribution and the multipath time ...
متن کامل