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17 February 1995 Hybrid wavelength hopping/time spreading code division multiple access systems
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Proceedings Volume 2450, Broadband Networks: Strategies and Technologies; (1995)
Event: Advanced Networks and Services, 1995, Amsterdam, Netherlands
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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ljubisa Tancevski and Ivan Andonovic "Hybrid wavelength hopping/time spreading code division multiple access systems", Proc. SPIE 2450, Broadband Networks: Strategies and Technologies, (17 February 1995);

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