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Interference in DS-CDMA Systems with Exponentially Vanishing Autocorrelations: Chaos-Based Spreading is Optimal

By ROVATTI R and MAZZINI G

Abstract

A novel estimation of the minimum achievable interference in direct sequence-code division multiple access (DS-CDMA) systems is introduced, which holds when spreading sequences with exponentially vanishing autocorrelation are employed. This can be applied to many of the recently proposed improvements to classical maximum-length or Gold sequences, such as chaos-based spreading. Asymptotic, infinite-bandwidth results are also provided, clarifying the maximum attainable gain. Empirical evidence shows that this theoretical maximum is achieved by some chaos-based sequences which are therefore optima

Year: 1998
DOI identifier: 10.1049/el:19981384
OAI identifier: oai:iris.unife.it:11392/1206174
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