Proceedings of the 1999 IEEE Information Theory and Communications Workshop (Cat. No. 99EX253)
DOI: 10.1109/itcom.1999.781437
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Abstract: We show that chaotic spreading sequences generated by ergodic mappings of Chebyshev orthogonal polynomials have better correlation properties for CDMA than the optimal binary sequences (Gold sequences) in the sense of ensemble average.

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Cited by 12 publications
(7 citation statements)
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References 6 publications
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“…The chaotic spreading sequence used is based on the Chebyshev map [37], as in the previous section. The numerical evaluation of the analytic result of (27) is calculated based on 10, 000 runs of the D m RV.…”
Section: Simulation Results and Discussionmentioning
confidence: 99%
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“…The chaotic spreading sequence used is based on the Chebyshev map [37], as in the previous section. The numerical evaluation of the analytic result of (27) is calculated based on 10, 000 runs of the D m RV.…”
Section: Simulation Results and Discussionmentioning
confidence: 99%
“…In practice, a spreading sequence is not strictly required for the setup to work as may be inferred from the expressions of η Dm and σ 2 Dm : the main contributions to data recovery η 1 (s m ) (36), and η 7 (s m ) (44)-d 2 evenand η 10 (s m ) (53)-d 2 odd-, are fully dependent on the evolution of the fading gains. Given the scope of the article, focused on improving DCSK, the spreading sequence used in the corresponding tests is based on the Chebyshev map [37] …”
Section: B Case Studies For the Two-ray Modelmentioning
confidence: 99%
“…One can see that for a low spreading factor (β = 15), the chaos-based system gives better performance results as compared to Gold sequences. Indeed, for such values of the spreading factor, the cross-correlation between two chaotic sequences is lower than that between two Gold sequences [121]. Finally, when the spreading factor is high (β = 127), the correlations are still similar, and the variance of the bit energy for the chaos-based DS-CDMA system is much reduced.…”
Section: B: Performance Analysismentioning
confidence: 95%
“…Using these models, many properties of chaos are newly found. These solvable models also enable us to investigate performances of applications using chaotic properties [4][5][6]. However, it is still difficult to judge whether the observed data are chaotic data or pure random data.…”
Section: Introductionmentioning
confidence: 99%
“…On the other hand, many chaotic sequences are proposed to be used as spreading sequences in Code Division Multiple Access (CDMA) which is one of radio data transmission techniques [5][6][7][8][9]. Many researchers who have investigated chaos focused on how to use these chaotic properties in telecommunication systems.…”
Section: Introductionmentioning
confidence: 99%