Spreading Sequences for Asynchronous Spectrally Phase Encoded Optical CDMA

Omrani, Reza and Kumar, Vijay P (2006) Spreading Sequences for Asynchronous Spectrally Phase Encoded Optical CDMA. In: 2006 IEEE International Symposium on Information Theory, , 9-14 July 2006 , Seattle, WA.

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Abstract

In phase encoding optical CDMA (OCDMA) the spreading is achieved by encoding the phase of signal spectrum. In this paper we first derive a mathematical model for the output of phase encoding OCDMA systems. Based on this model we introduce a metric to design spreading sequences for asynchronous transmission. Then we connect the phase encoding sequence design problem to OFDM PMEPR (peak to mean envelope power ratio) problem. Using this connection we conclude that designing sequences with good properties for samples of timing delay guarantees that the same sequence to be good for all timing delays. Finally using generalized bent function we manage to construct a family of sequences which are good for asynchronous phase encoding OCDMA systems and using these sequences we introduce an M-ary modulation scheme for phase encoding OCDMA

Item Type:	Conference Paper
Publisher:	IEEE
Additional Information:	Copyright 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	10 Nov 2011 04:41
Last Modified:	10 Nov 2011 04:41
URI:	http://eprints.iisc.ac.in/id/eprint/42021

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