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Hybrid wavelength hopping/time spreading code division multiple access systems

Hybrid wavelength hopping/time spreading code division multiple access systems The capacity of local area networks (LAN) can be substantially increased by amalgamating different access techniques. Wavelength Division Multiplexing (WDM) and Code Division Multiple Access (CDMA) both offer and asynchronous mode of communications. Integration of WDM and CDMA could offer increases in the network capacity whilst still attaining asynchronous operation. Here, a different kind of integration is proposed, similar to the hybrid system used in electrical CDMA. A novel optical CDMA concept using wavelength hopping and time spreading is described employing prime sequences for both hopping and spreading and proof is given that the autocorrelation function has zero side-lobes and that the crosscorrelation function is at most 1. Code generation and correlation is achieved efficiently, the number of possible stations is greatly increased as is the number of simultaneous users. It is shown that the system offers unprecedented security leading to a very secure communications. The system is suitable for truly asynchronous highly secure LAN applications. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Proceedings of SPIE SPIE

Hybrid wavelength hopping/time spreading code division multiple access systems

Tancevski, Ljubisa; Andonovic, Ivan
Proceedings of SPIE , Volume 2450 (1) – Feb 17, 1995
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References (7)

Publisher
SPIE
Copyright
Copyright © 2004 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
ISSN
0277-786X
eISSN
1996-756X
DOI
10.1117/12.201256
Publisher site
See Article on Publisher Site

Abstract

The capacity of local area networks (LAN) can be substantially increased by amalgamating different access techniques. Wavelength Division Multiplexing (WDM) and Code Division Multiple Access (CDMA) both offer and asynchronous mode of communications. Integration of WDM and CDMA could offer increases in the network capacity whilst still attaining asynchronous operation. Here, a different kind of integration is proposed, similar to the hybrid system used in electrical CDMA. A novel optical CDMA concept using wavelength hopping and time spreading is described employing prime sequences for both hopping and spreading and proof is given that the autocorrelation function has zero side-lobes and that the crosscorrelation function is at most 1. Code generation and correlation is achieved efficiently, the number of possible stations is greatly increased as is the number of simultaneous users. It is shown that the system offers unprecedented security leading to a very secure communications. The system is suitable for truly asynchronous highly secure LAN applications.

Journal

Proceedings of SPIE – SPIE

Published: Feb 17, 1995

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