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World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

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Demonstration of 4-Node 253G chip/s fast frequency-hopping time-spreading optical CDMA with differentiated service provisioning

Glesk, I. (2004) Demonstration of 4-Node 253G chip/s fast frequency-hopping time-spreading optical CDMA with differentiated service provisioning. In: Proceedings of Optical Communication Systems and Networks 2004. IASTED. ISBN 0-88986-403-9

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Abstract

We present an experimental study of fast frequency-hopping time-spreading Optical CDMA (OCDMA) using a 4-node testbed at 253Gchips/s. Error free operation of 4 simultaneous users is obtained with an effective power penalty 0.5dB. We also demonstrate its capability to provide differentiated service in the physical layer, by varying the code weight. The novel control of a reconfigurable delay line enables variation of the code weight, and hence service guarantees on a per-bit-basis. Ultrafast all-optical gating was used to further reduce multiple access interference.