Chaotic complex spreading sequences for asynchronous DS-CDMA - Part II: Some theoretical performance bounds

被引:118
作者
Rovatti, R
Setti, G
Mazzini, G
机构
[1] Univ Bologna, Dept Elect, I-40136 Bologna, Italy
[2] Univ Ferrara, Dept Engn, I-44100 Ferrara, Italy
[3] CNR, CSITE, I-40136 Bologna, Italy
来源
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-FUNDAMENTAL THEORY AND APPLICATIONS | 1998年 / 45卷 / 04期
关键词
chaos-based communication systems; code division multiple access; statistical dynamical system theory;
D O I
10.1109/81.669073
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
This paper and its companion (Part I) are devoted to the evaluation of the impact of chaos-based techniques on communications systems with asynchronous Code Division Multiple Access. In Part I, a performance index was introduced and exploited to a priori estimate the performance of DS-CDMA communications systems based on chaotic spreading sequences, and to compare it to that of conventional systems, Here, tools from nonlinear dynamical system theory are employed to give a formal ground for those results. Analytical bounds on the expected partial cross correlation between spreading sequences obtained by quantizing and repeating a chaotic time series are derived, ensuring general applicability of such a technique in a real environment. Further analytical arguments guarantee that, when particular chaotic generators are used, expected performance is not worse than that of a well-behaving communications system. This analysis ensures also that, unlike conventional sequences, chaotic spreading codes can be generated for any number of users and allocated bandwidth.
引用
收藏
页码:496 / 506
页数:11
相关论文
共 22 条
[11]   A CHAOTIC DIRECT-SEQUENCE SPREAD-SPECTRUM COMMUNICATION-SYSTEM [J].
HEIDARIBATENI, G ;
MCGILLEM, CD .
IEEE TRANSACTIONS ON COMMUNICATIONS, 1994, 42 (2-4) :1524-1527
[12]   ERGODIC PROPERTIES OF INVARIANT-MEASURES FOR PIECEWISE MONOTONIC TRANSFORMATIONS [J].
HOFBAUER, F ;
KELLER, G .
MATHEMATISCHE ZEITSCHRIFT, 1982, 180 (01) :119-140
[14]  
KODHA T, 1994, P IEEE INT S SPREAD, P391
[15]  
Lasota A., 1994, Applied Mathematical Sciences, V2nd
[16]   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
[18]  
MINC H, 1987, NONNEGATIVE MATRICES
[19]   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
[20]  
SAIGUI H, 1994, P IEEE SE 96 BRING T, V42, P1524