因此研究湍流大气信道对量子密钥分布系统性能的影响就非常重要。
So it is important to analyze the effect of turbulent atmosphere channel on quantum key distribution systems.
随后，本文着重分析了空-地随机大气信道的吸收、散射和湍流特性。
Subsequently, we stress on the absorption and scattering characteristics of space-to-ground atmospheric stochastic channel.
通过对大气信道方面的研究，给出了FSO系统工作波长的选择原则。
Through the research on atmospheric channel aspect, the selection principles of FSO operating wavelength are shown.
目前对无线光通信系统在大气信道中应用LDPC码的研究少见于文献。
For the time being, there is little research of applying LDPC codes to the atmospheric wireless optical communication.
论文研究了影响大气激光传输的大气吸收、散射、湍流和热晕效应，构建了大气信道模型。
Then the paper researches into atmospheric absorption which influences on atmosphere laser transmission, scattering, rapids, thermal blooming effect and the constructs atmospheric channel model.
讨论了光子与大气的相互作用，利用量子计算语言对大气信道中的量子密钥分配进行了仿真。
We discussed the interaction between a photon and the atmosphere, and simulated the quantum key distribution protocol between atmospheric channels using the quantum computation language.
针对大气信道对大气激光通信的质量有很大影响，设计了一种光电复合的光ppm偏振调制硬件系统。
Since atmosphere signal path has a great influence on the laser atmosphere communication quality, a Photo-electrical PPM Polarization Modulation system is designed.
文中介绍了激光信号通过随机大气信道时，大气湍流效应造成了光束抖动、强度起伏，光束扩展和像点抖动等现象。
In this paper the dithering of beam light, the undulating of beam intension, spread of the beam light and the dithering of image are introduced.
本论文还深入分析了大气衰减效应和大气湍流效应对激光传输的影响，然后给出了一种基于大气信道效应的大气信道模型。
The influence of atmospheric attenuation and turbulence to laser transmission is profoundly analyzed in the paper. Then , A model, based the atmospheric attenuation and turbulence effects, is present.
对大气强抖动和弱抖动模式下空间光信道衰减模型做了深入分析，并用似然检测分析了系统性能。
The model of the optical channel in strong and weak turbulences is analyzed, the system performance is studied by maximum probability detection.
同时实验中获得了大量的数据，为进一步建立大气随机信道模型提供了有力的依据。
While we obtain a great quantity of data in experiment, it presents the strong reliance to further establish atmosphere random channel model.
建立了激光通过倾斜和水平的大气随机信道的数学传输模型。
Models describing laser beam propagate through horizontal and slant atmospheric stochastic channel are built.
因此，对激光通过大气随机信道远场光斑的实验测量具有十分重要的意义。
Therefore, it is very important to experimental measurement to far-field optical spot of atmospheric random channel, which can be passed by laser.
本文旨在研究大气随机信道对光通信链路的影响。
The purpose of this thesis is to research on effect of atmospheric random channel to optical communication.
实际星地光通信系统的发射光束为高斯型的情况下，跟瞄误差和大气闪烁是星地激光链路中的主要信道噪声源。
The transmitter beam is Gaussian for real satellite-ground laser communication system. The pointing jitter and atmospheric scintillation are the main noise sources for satellite-ground laser link.
实际星地光通信系统的发射光束为高斯型的情况下，跟瞄误差和大气闪烁是星地激光链路中的主要信道噪声源。
The transmitter beam is Gaussian for real satellite-ground laser communication system. The pointing jitter and atmospheric scintillation are the main noise sources for satellite-ground laser link.
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