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Research of Atmosphere Channel for Space-to-Ground Optical Communication

Author: CaoRuiQing
Tutor: MaYong
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: The empty - ground optical communications Atmospheric channel Intensity flashing Debilitating probability Spot characteristics Model
CLC: TN929.1
Type: Master's thesis
Year: 2007
Downloads: 151
Quote: 0
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Abstract


With the development of science and technology as well as electronic devices for optical communication applications suitable for space research technology matures , the free space optical communication become a new type of wireless communication with its high-bandwidth , high bit-rate , high-security , low-power , etc. way. In the air - ground communication systems , wireless optical communication is considered to be the way to solve the the empty - communicate high bit rate \Atmospheric Laser Communication atmospheric random channel the atmospheric role is the biggest problem faced by the atmospheric optical communication . Study atmospheric random channel characteristics and optical signal transmission channel in the atmosphere is very important , and a great reference value in the air - ground laser communication system design and implementation . The research content is empty - ground atmospheric random channel characteristics as well as the impact of wireless optical communication . The paper introduces a variety of factors that affect the performance of optical communication in the atmosphere , the energy attenuation and background noise optical signal propagation in the atmosphere , the focus on atmospheric turbulence induced by the light intensity flashes , and discuss the flicker noise of the received signal The debilitating probability . The paper also discusses the atmospheric channel optical signal time broadening and space expansion , beam quality to describe the impact of atmospheric turbulence on the beam divergence angle and spreading loss . Last simplified model of the atmospheric optical transmission channel of the air - ground to simulate the air - ground the received light signal of the optical communication link , and the remainder of the communication link is estimated , and air - ground optical communication test The results are compared. Can be seen from the comparison of the results of air - ground atmospheric optical channel model established in the paper , and has laid a good foundation for the next phase of work .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Lightwave communications, laser communications
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