一种改进的差分混沌键控通信方案及其性能分析  

An Improved Scheme of Differential Chaos Shift Keying and Performance Analysis

作　　者：葛志平 蒋铃鸽[1] 何晨[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《上海交通大学学报》2004年第z1期14-17,21,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(60272082)

摘　　要：提出了一种混沌通信的改进方案,将差分混沌键控(DCSK)中的参考信号和信息信号通过不同的线路信道或不同的频带信道传输,在接收端通过相关接收解调二进制数字信号.通过对其噪声性能进行理论分析和仿真分析可知,改进方案具有与DCSK相似的噪声特性,在混沌信号源带宽和信息信号长度相同的条件下,改进系统有更快的信息传输速率,并且改善了系统结构,提高了信号在传输中的安全性.This paper presented an improved chaos communcation scheme, which transmits the reference chip and information-bearing chip of the differential chaos shift keying(DCSK) through respective channels(line or bandwidth), and then demodulates the binary digital signal using correlator in the receiver. The noise performance of the enhanced scheme is similar with the DCSK. It can transmit the signals more quickly than the DCSK, when they have the same chaotic signal bandwidth and information-bearing chip length. It has better system structure and its signals are more difficult to intercept during the transmission.

关 键 词：混沌通信 差分混沌键控 参考信号传输系统 噪声特性 

分 类 号：TN911.3[电子电信—通信与信息系统]