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Research Of Atmosphere Optical Communication System

Posted on:2008-10-15Degree:MasterType:Thesis
Country:ChinaCandidate:W WangFull Text:PDF
GTID:2178360272468816Subject:Communication and Information System
Abstract/Summary:PDF Full Text Request
In recent years, as aeronautical and aerospace technologies rise and the demand for bandwidth grows, the traditional microwave communication method can't satisfy people's requirements any more. Hence, people resort to wireless optical communication again which has been put aside for years. In wireless optical communication, the atmosphere is the main media which optical carrier has to travel through, so atmosphere draws more attention of researchers.The thesis do research on atmosphere laser carrier communication, focusing on the modulation, detection and demodulation of laser carrier, and aiming at finding a proper communication scheme for atmosphere optical communication. The work of the thesis includes: A summary of the development and application of atmosphere optical communication; analysis on the principle of laser carrier modulation; Research on common techniques of laser carrier modulation and multiplexing;Finally, design two atmosphere optical communication systems, and do simulation and performance analysis on them.The research and simulation atmosphere optical communication system shows: the performance of coherent optical communication system is really superior to that of non-coherent optical communication system. Moreover, with the introduction of microwave subcarrier multiplexing, coherent optical communication system is able to accomodate multiple users or multiple information bit stream simultaneously. It is proved in this thesis that an atmosphere optical communication system can performs well with coherent technology and optical microwave subcarrier multiplexing.
Keywords/Search Tags:atmosphere laser carrier communication, coherent optical communication, optical microwave subcarrier multiplexing, modulation of optical carrier, intensity modulation, direct detection, coherent modulation, heterodyne detection
PDF Full Text Request
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