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大气信道
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  atmospheric channel
     The Influence of Atmospheric Channel on Laser Signal Transmission and MATLAB Simulation
     大气信道对激光信号传输的影响以及MATLAB仿真
短句来源
     Research on Atmospheric Channel Model of Ultraviolet Communication Systems
     紫外光通信大气信道模型研究
短句来源
     We have designed to the atmospheric channel noise Turbo code scheme, after introduced the Turbo code basic theory.
     在介绍了Turbo码的基础理论后,设计了对大气信道噪声的Turbo码的编码方案。
短句来源
     (3) The receiving module of optical wireless access system over the character of the atmospheric channel has been designed.
     (3) 针对大气信道特点设计光无线宽带接入系统的接收模块。
短句来源
     Based on the analysis of the atmospheric channel and avalanche photodiode noise, the mathematical model of the output of the APD detector in the PPM receiver is discussed and the bit error rate of the APD detector is calculated and analyzed.
     分析了大气信道、雪崩光电二极管(APD)的噪声对光脉冲产生的影响,在此基础上,给出了PPM调制接收机APD探测器的输出数学模型,得到了APD探测器的输出误码特性。
短句来源
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  atmosphere channel
     Study on atmosphere channel that influencing on laser PPM signal
     大气信道对激光PPM信号的影响的研究
短句来源
     Study on Free-space Optical Communication Atmosphere Channel and Design of System
     自由空间光通信大气信道模型研究及系统设计
短句来源
     Analysis of the laser beam through random atmosphere channel
     随机大气信道对激光信号传输影响的分析
短句来源
     A proof-of-concept experiment employs a micro lens array each diameter of which is 15 mm and sea water and atmosphere channel with length of 12.65 m to simulate the strong scattering in real case. The results indicate good feasibility of the proposed model.
     实验采用直径为15 mm的微透镜阵列以及长为12.65 m的海水、大气信道来模拟实际信道中的强散射作用,结果表明该模型具有较好的可行性。
短句来源
     The effect of turbulent atmosphere channel on quantum bit error rate(QBER) of a free-space QKD system based on BB84 protocol is described quantatively by near-field beam propagation theory and statistical method.
     使用光束近场传播和统计分析的方法定量分析了湍流大气信道对基于BB84协议的自由空间量子密钥分布系统的误码率的影响。
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  “大气信道”译为未确定词的双语例句
     They can be experimentally validated through a set of device besides CCD that can shoot and analyze the images of laser signals on conditions of different visibility,atmosphere and time.
     通过一实验装置,利用CCD对通过大气信道的光束在不同能见度、不同大气条件和不同时刻等条件下对激光传输信号的图像的拍摄及所拍摄的图像的对比分析,验证了理论分析中的各种大气随机信道的效应。
短句来源
     This paper is mainly study of characteristics of space-to-ground atmospheric stochastic channel.
     本文主要研究空-地随机大气信道的特性,特别是大气随机信道对激光传输的影响。
短句来源
     This paper is mainly study of the atmospheric influence on thelaser transmission for its stochastic behavior.
     本课题针对大气信道的随机特性,主要研究大气随机信道对半导体激光传输的影响。
短句来源
     , free-space optical communications has attracted many countries' attention. The influence of atmospheric turbulence to laser transmission is profoundly analyzed in the paper.
     本论文还深入分析了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湍流效应的大气信道模型,并用MATLAB进行远场光斑仿真。
短句来源
     Particles in atmosphere scatter laser and absorb the energy of laser, these causes attenuation of laser.
     大气信道中的大气粒子对传输的激光进行散射和吸收,造成光束的扩散、衰减等效应,这些都是光通信需要克服的难点。
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  atmospheric channel
Based on analysis of transmission in atmospheric channel concerning 650 nm laser beam, performance of wireless laser communication link utilizing a low power red laser diode was evaluated.
      
Free-space laser communication performance in the atmospheric channel
      
Atmospheric channel effects on free-space laser communication
      
These results are expected to be of use in the study of atmospheric turbulence, as well as in the evaluation of certain stochastic functionals that occur in optical communication theory for the turbulent atmospheric channel.
      


The coherent bandwidths for laser atmospheric communication channels

本文选用合理的模型模拟了大气信道中雨滴、烟雾带来的相干带宽,并进行了数值计算。结果表明:对于雨滴、轻雾信道,相干带宽很宽;而对于烟雾浓度较大的信道,信道的相干带宽应引起激光大气通信的重视。

Laser signal is affected by the scintillation in the course of atmospheric transmission,thus the performances of the laser detecting system are unstable In this paper,the effect of atmospheric scintillation to laser signal detection is roughly estimated and calculated The corresponding changes of signal detection are also demonstrated

激光在大气信道中传输时,会受到大气闪烁的影响,从而造成激光检测系统性能不稳定。文中对大气信道中大气闪烁效应对激光信号检测的影响作了初步的分析和计算,并给出了在一定大气湍流条件下激光检测相应的变化。

Free Space Optics (FSO) has become a viable, high bandwidth wireless alternative to fiber optic cabling. The primary advantages of FSO over fiber are its rapid deployment time and significant cost savings. The disadvantage of FSO over fiber is that laser power attenuation through the atmosphere is variable and difficult to predict, for it is weather dependent. In this paper, the atmospheric channel and some problems in the design of the FSO communications system are discussed.

自由空间光通信已经成为一种可行的、宽带宽的无线通信方式。相比于光纤通信 ,自由空间光通信可迅速配置 ,并且价格低廉。由于信道和天气相关 ,因此 ,在大气中光功率的损耗是不确定的 ,并且难以预测。介绍了大气信道 ,针对自由空间光通信系统建立当中的问题进行阐述 ,并提出了解决办法。

 
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