Role of optical CDMA in access networks

Type :

Term papers

Pages :

3 pages

Format :

.pdf

Published date :

10/08/2009

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Summary :

 
 

Table of Contents Role of optical CDMA in access networks Table of Contents

 
  1. Abstract
  2. Introduction
  3. Optical CDMA for access networks
    1. Fair division of bandwidth
    2. Flexibility
    3. Network control and management
    4. Service differentiation
    5. Security
  4. Technological barriers to acceptance
    1. Shot and beat noise
    2. Forward error correction
  5. Cost barriers
    1. Encoding and decoding hardware
    2. Broadband light source
  6. Perception barriers
    1. Inefficient optical CDMA
  7. Conclusion
  8. References

Abstract

optical code-division multiple access (OCDMA) combines the large bandwidth of the fiber medium with the flexibility of the cdma technique to achieve high-speed connectivity. cdma was originally investigated in the context of radio frequency communications systems, and was first applied to the optical domain in the mid-1980s [1]. Researchers sought to use the excess bandwidth in single-mode fibers to achieve random asynchronous operation without the need for a centralized network controller. In an O-cdma system, each bit is divided up into n time periods, called chips. By sending a short optical pulse during some chip intervals, but not others, an optical signature sequence, or codeword, can be created. Each user on the O-cdma system has a unique signature sequence.

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About the author :

pencil image Vijay P. Director of Shri HDG MBA College
Level :General public Study : Management School/University : Saurashtra University

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