Chaos-based asynchronous DS-CDMA systems and enhanced rake receivers: Measuring the improvements

Gianluca Mazzini, Riccardo Rovatti, Gianluca Setti

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Results of recent theoretical investigations high-lighted that the use of chaos in direct-sequence code-division multiple access (DS-CDMA) systems may lead to nonnegligible improvements in communication quality for several scenarios. We here briefly review the main steps in this derivation and report the experimental verifications of the corresponding theoretical prediction. With this, we confirm that chaos-based spreading sequences outperform classical pseudo-random sequences in at least two important cases. Over nonselective channels, the ability of chaos-based spreading of minimizing multiple-access interference leads to a measured 60% improvement in Perr with respect to classical spreading. Over selective channels, the possibility of jointly optimizing chaos-based spreading and rake receiver profiles leads to improvements of up to 38% in Perr with respect to systems with either conventional spreading or conventional rake policies.
Original languageEnglish (US)
Pages (from-to)1445-1453
Number of pages9
JournalIEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
Volume48
Issue number12
DOIs
StatePublished - Dec 1 2001
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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