Interference minimisation by autocorrelation shaping in asynchronous DS-CDMA systems: chaos-based spreading is nearly optimal

被引：105

作者：

Mazzini, G

Rovatti, R

Setti, G

机构：

[1] Univ Ferrara, I-44100 Ferrara, Italy

[2] Univ Bologna, DEIS, I-40136 Bologna, Italy

来源：

ELECTRONICS LETTERS | 1999年 / 35卷 / 13期

关键词：

D O I：

10.1049/el:19990754

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 minimised 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.

引用

页码：1054 / 1055

页数：2

共 4 条

[1] Chaotic complex spreading sequences for asynchronous DS-CDMA .1. System modeling and results [J].

Mazzini, G ;

Setti, G ;

Rovatti, R .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS, 1997, 44 (10) :937-947

[2] PERFORMANCE EVALUATION FOR PHASE-CODED SPREAD-SPECTRUM MULTIPLE-ACCESS COMMUNICATION .1. SYSTEM-ANALYSIS [J].

PURSLEY, MB .

IEEE TRANSACTIONS ON COMMUNICATIONS, 1977, 25 (08) :795-799

[3] Interference in DS-CDMA systems with exponentially vanishing autocorrelations: Chaos-based spreading is optimal [J].

Rovatti, R ;

Mazzini, G .

ELECTRONICS LETTERS, 1998, 34 (20) :1911-1913

[4] Chaotic complex spreading sequences for asynchronous DS-CDMA - Part II: Some theoretical performance bounds [J].

Rovatti, R ;

Setti, G ;

Mazzini, G .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS, 1998, 45 (04) :496-506

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