Interference minimization by auto-correlation shaping in asynchronous DS-CDMA systems: Chaos-based spreading is nearly optimal

G. Mazzini; R. Rovatti; G. Setti

doi:10.1049/el:19990754

Interference minimization by auto-correlation shaping in asynchronous DS-CDMA systems: Chaos-based spreading is nearly optimal

G. Mazzini, R. Rovatti, G. Setti

Research output: Contribution to journal › Article › peer-review

114 Scopus citations

Abstract

The classical estimation of co-channel interference in asynchronous direct sequence-code division multiple access (DS-CDMA) systems, obtained for a conventional receiver under the standard Gaussian approximation (SGA), is analytically minimized with respect to the auto-correlation function of spreading sequences. The optimum auto-correlation function is found to be real, with alternating signs, and extremely closely follows an exponential trend. A family of chaotic maps is presented which is able to generate sequences with exponential auto-correlation function with alternating signs. The resulting DS-CDMA system is an extremely good approximation of the optimum achievable system.

Original language	English (US)
Pages (from-to)	1054-1055
Number of pages	2
Journal	Electronics Letters
Volume	35
Issue number	13
DOIs	https://doi.org/10.1049/el:19990754
State	Published - Jun 24 1999
Externally published	Yes

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1049/el:19990754

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abstract = "The classical estimation of co-channel interference in asynchronous direct sequence-code division multiple access (DS-CDMA) systems, obtained for a conventional receiver under the standard Gaussian approximation (SGA), is analytically minimized with respect to the auto-correlation function of spreading sequences. The optimum auto-correlation function is found to be real, with alternating signs, and extremely closely follows an exponential trend. A family of chaotic maps is presented which is able to generate sequences with exponential auto-correlation function with alternating signs. The resulting DS-CDMA system is an extremely good approximation of the optimum achievable system.",

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AU - Mazzini, G.

AU - Rovatti, R.

AU - Setti, G.

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PY - 1999/6/24

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N2 - The classical estimation of co-channel interference in asynchronous direct sequence-code division multiple access (DS-CDMA) systems, obtained for a conventional receiver under the standard Gaussian approximation (SGA), is analytically minimized with respect to the auto-correlation function of spreading sequences. The optimum auto-correlation function is found to be real, with alternating signs, and extremely closely follows an exponential trend. A family of chaotic maps is presented which is able to generate sequences with exponential auto-correlation function with alternating signs. The resulting DS-CDMA system is an extremely good approximation of the optimum achievable system.

AB - The classical estimation of co-channel interference in asynchronous direct sequence-code division multiple access (DS-CDMA) systems, obtained for a conventional receiver under the standard Gaussian approximation (SGA), is analytically minimized with respect to the auto-correlation function of spreading sequences. The optimum auto-correlation function is found to be real, with alternating signs, and extremely closely follows an exponential trend. A family of chaotic maps is presented which is able to generate sequences with exponential auto-correlation function with alternating signs. The resulting DS-CDMA system is an extremely good approximation of the optimum achievable system.

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JO - Electronics Letters

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IS - 13

ER -

Interference minimization by auto-correlation shaping in asynchronous DS-CDMA systems: Chaos-based spreading is nearly optimal

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