On the performance of chaos-based multicode DS-CDMA systems

被引：16

作者：

Vitali, S

Rovatti, R

Setti, G

机构：

[1] Univ Bologna, ARCES, I-40125 Bologna, Italy

[2] Univ Ferrara, ENDIF, I-44100 Ferrara, Italy

[3] Univ Bologna, DEIS, I-40100 Bologna, Italy

来源：

CIRCUITS SYSTEMS AND SIGNAL PROCESSING | 2005年 / 24卷 / 05期

关键词：

multicode DS-CDMA; asynchronous interference minimization; chaos-based spreading;

D O I：

10.1007/s00034-005-2402-y

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：

Multicode DS-CDMA systems assign more than one spreading sequence to each of the users. In these systems multiple access interference (MAI) is made of a synchronous and an asynchronous component. It is well known that asynchronous MAI alone can be minimized by means of chaos-based spreading. Here we address the trade-off between synchronous and asynchronous MAI by tuning the autocorrelation profile of the chaos-based spreading codes. Improvements in the number of users allowed in the system is demonstrated in certain load conditions with respect to the classical approach of providing each user with a set of orthogonal sequences taken from an i.i.d. process.

引用

页码：475 / 495

页数：21

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