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The Research of OCDMA Codec

Author: ZhangZuo
Tutor: LiYanPing
School: Taiyuan University of Technology
Course: Communication and Information System
Keywords: OCDMA Codec Optical address codes Long period fiber grating
CLC: TN929.533
Type: Master's thesis
Year: 2011
Downloads: 69
Quote: 0
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Abstract


The optical fiber communication because of the massive bandwidth of the optical fiber , while having unmatched signal transmission capacity of electrical communication . The optical fiber has a higher signal quality , farther transmission distance , large information capacity , has a wide range of applications in the field of computer communications and telecommunications , the communication level , modes of communication, as well as people's lifestyles have undergone tremendous changes . Optical fiber communication and computer technology with the formation of the two major pillars of the modern high-tech , largely to promote the prosperity and development of the society and the progress of human civilization . Code division multiple access (CDMA) technology because of its excellent technical advantages , it has a relatively wide range of applications in the field of mobile communications and satellite communications technology compared with other multiple access , CDMA systems with greater system capacity confidentiality . well , stronger anti-interference ability . But the advantages of CDMA technology is still not fully played out , this is because has a bandwidth limitation in the mobile communication and satellite communication . The thesis of the function and structure of a key part of the optical code division multiple access (OCDMA) system , which focuses on codec technology . The focus of the work is as follows : ( 1 ) to study the problem of long period fiber grating dispersion compensation simulation system built on dispersion compensating fiber obtained simulation curve , to verify the validity of the signal transmission dispersion compensation recovery . (2) validation of long period fiber grating based codecs . Long period fiber first introduced the basics , including the method of writing , and analytical methods . Which analytical methods used in the coupled mode theory is popular . Analyzed by the pattern exists in the long-period grating , the drawn cross long period grating transmission spectrum, to design codec parameters . (3 ) emulation software through Optisystem , the long period fiber grating based OCDMA codec system emulation , draw and analyze the simulation results .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications > Cellular mobile communications systems (mobile phones, mobile phone handsets ) > Code Division Multiple Access (CDMA) mobile communication
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