相干DCSK混沌通信系统的多用户噪声性能  

Noisy Multiuser Performance of Coherent DCSK Chaos Communication Systems

作　　者：王光义[1] 丘水生[1] 马在光[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2003年第12期1-4,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (6 96 72 0 2 2 ) ;教育部高校博士点学科基金资助项目 (0 0 0 5 6 1 0 7) ;广州市科技发展项目资助

摘　　要：为了定量描述混沌数字通信系统的多用户噪声性能 ,基于离散时间混沌序列 ,提出了相干DCSK(DifferentialChaosSniftKeying)系统在多用户噪声环境下误码性能的一种近似分析方法 ,获得了多用户、单用户误码性能及其理论上界的表达式 ,理论计算与计算机仿真结果一致 .结果表明 ,随着用户的增加其误码率显著下降 ,且存在一个较大的性能下界 .In order to give a quantitative description of the noisy multiuser performance of digital communications using chaos, a new approach is proposed to analyze the noisy multiuser performance of a coherent DCSK system in this paper, based on discrete time chaotic sequences. The expressions of error performance and its upper bound for multiuser and single user are given theoretically and verified by the simulation results. Theoretical and simulation results show that the noise performance is reduced rapidly by increasing the number of the multi user, and that there is a bound for noisy multiuser performance of coherent DCSK. The approach to increasing the performance is to produce a set of orthogonal chaotic signals.

关 键 词：相干DCSK 混沌通信系统 多用户 误码性能 噪声性能 

分 类 号：TN911.4[电子电信—通信与信息系统]