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差分混沌键控(DCSK)通信系统估值误差分析 预览

Analysis of Estimation Variance in Differential Chaos Shift Keying Telecommunication Systems
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摘要 在具有去噪声模块的DCSK(differential chacs shift keying)通信系统中,存在三种导致估值误差的因素,这三种因素分别来源于DCSK信号本身、加性信道噪声和去噪声模块。经过对上述三种因素的分析,提出了一种新型的DCSK通信系统,该系统使用混沌多相序列(CPS)避免DCSK信号本身带来的误差,同时采用相空间量子化的方法降低加性信道噪声的干扰。仿真结果表明,虽然这种新型的DCSK通信系统因去噪声算法带来的误差而使其噪声特性略逊于FM-DCSK,但是在CPU运算时间及系统结构上,该系统比FM-DCSK复杂性降低,易于实现。 In this paper,we analyze the factors,which cause the estimation variance in a DCSK(differential chaos shift keying) telecommunication system implemented with noise decrease module.There are three main factors in this system:the DCSK signal itself,additive channel noise and the noise decrease module.To avoid the variance of DCSK signal itself and decrease that caused by additive channel noise,a novel DCSK scheme with chaotic polyphase sequence(CPS) is presented.The simulation results show that the noise performance of this novel DCSK slightly degrades in contrast to FM-DCSK for the estimation variance of the noise decrease scheme.However,this design can be implemented easily in the CPU time and system structure.
作者 刘虎 张莉萍 LIU Hu 1, ZHANG Shu-jing 1, ZHANG Li-ping 2(1.Institute of Traffic Information Engineering and Control,Tongji University West Campus,Shanghai 200331,China;2.Telecommunication Station in Lanxi,Gansu Branch Company of Railway Telecommunication Company
出处 《同济大学学报:自然科学版》 EI CAS CSCD 北大核心 2002年第4期 470-474,共5页 Journal of Tongji University(Natural Science)
基金 铁道部科技发展基金资助项目 (J98Z2 2 8)
关键词 差分混沌键控 DCSK 通信系统 估值误差 differential chaos shift keying(DCSK) chaotic polyphase sequence(CPS) noise performance
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参考文献2

  • 1陈式刚编著..映象与混沌[M].北京:国防工业出版社,1992:342.
  • 2赵声衡著..石英晶体振荡器[M].长沙:湖南大学出版社,1997:412.
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