Robust synchronization for asynchronous multi-user chaos-based DS-CDMA

被引：59

作者：

Kaddoum, Georges ^{[1
,2
]}

Roviras, Daniel ^{[1
]}

Charge, Pascal ^{[2
]}

Fournier-Prunaret, Daniele ^{[2
]}

机构：

[1] Univ Toulouse, IRIT Lab, F-31071 Toulouse, France

[2] Univ Toulouse, LATTIS, F-31077 Toulouse 4, France

来源：

SIGNAL PROCESSING | 2009年 / 89卷 / 05期

关键词：

Chaos-based DS-CDMA; Asynchronous multi-user; Synchronization; Code acquisition; Probability of detection; Probability of false alarm; CODE ACQUISITION;

D O I：

10.1016/j.sigpro.2008.10.023

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：

In this paper we propose two systems for achieving synchronization in asynchronous multi-user chaos-based DS-CDMA. For the first system, synchronization process is realized thanks to a binary code used as an additive pilot sequence to the spreaded signal. Gold sequences are used as pilot signals for the different users to accomplish the synchronization. For the second synchronization system, the synchronization is made through a binary code used as a multiplicative pilot signal for the spreaded data sequence. These synchronization processes are evaluated under the assumption of an additive white Gaussian noise channel together with multi-user interferences. In this paper we will focus on the initial synchronization phase (code acquisition) and we assume that the system can achieve correctly the code tracking after this first synchronization phase. The code acquisition for the two systems is evaluated in terms of the probability of detection and probability of false alarm. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：807 / 818

页数：12

共 31 条

[1]

CHEN C, 2001, INT S CIRC SYST SYDN, P149

[2] CIRCUIT IMPLEMENTATION OF SYNCHRONIZED CHAOS WITH APPLICATIONS TO COMMUNICATIONS [J].

CUOMO, KM ;

OPPENHEIM, AV .

PHYSICAL REVIEW LETTERS, 1993, 71 (01) :65-68

[3] SYNCHRONIZATION OF LORENZ-BASED CHAOTIC CIRCUITS WITH APPLICATIONS TO COMMUNICATIONS [J].

CUOMO, KM ;

OPPENHEIM, AV ;

STROGATZ, SH .

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-ANALOG AND DIGITAL SIGNAL PROCESSING, 1993, 40 (10) :626-633

[4]

ESHIMA N, 2004, INT S CIRC SYST VANC, P617

[5] Statistical approach to the code acquisition problem in direct-sequence spread-spectrum communication systems [J].

Eshima, Nobuoki ;

Kohda, Tohru .

IMA JOURNAL OF MATHEMATICAL CONTROL AND INFORMATION, 2006, 23 (02) :149-163

[6]

Holmes JackK., 1982, COHERENT SPREAD SPEC

[7] Bit error rate of incompletely synchronised correlator in asynchronous DS/CDMA system using SS Markovian codes [J].

Jitsumatsu, Y ;

Kohda, T .

ELECTRONICS LETTERS, 2002, 38 (09) :415-416

[8] A robust sequence synchronization unit for multi-user DS-CDMA chaos-based communication systems [J].

Jovic, B. ;

Unsworth, C. P. ;

Sandhu, G. S. ;

Berber, S. M. .

SIGNAL PROCESSING, 2007, 87 (07) :1692-1708

[9]

KADDOUM G, 2004, P 15 IEEE INT C EL C

[10]

KADDOUM P, 2007, P INT S NONL THEOR I

← 1 2 3 4 →