过抽样混沌映射在语音通信中的应用研究  

Application research of over-sampled chaotic maps in voice communication

作　　者：刘淑聪[1] 杨敬松[1] 宋燕星[1] 

机构地区：[1]防灾科技学院仪器系,河北三河065201

出　　处：《计算机工程与应用》2013年第2期119-121,129,共4页Computer Engineering and Applications

基　　金：中央高校基本科研业务费专项资金青年教师资助计划项目(No.ZY20110208)

摘　　要：通过对混沌序列特性的研究,提出一种基于过抽样Chebyshev、Logistic混沌映射相结合为混沌密钥的方法对语音信号进行加密处理,克服了传统混沌序列加密时密钥简单造成安全性较低的缺点。在生成多参数混沌密钥的基础上,构建语音信号加密传输系统实现信号加密、调制,并在接收端实现信号解调和解密仿真过程。实验结果证明,该方法的应用使混沌密钥参数增加为多个,使得加密系统拥有更高的安全及保密性能,可以更好地应用于加密通信中。Through the research to chaotic sequence characteristics, a method of speech signal encryptionby combining Cheby- shev chaos mapping with Logistic chaos mapping to be the chaotic key is put forward, which overcomes the shortcomings of lower security caused by simple key when traditional chaotic sequence encrypting. On the basis of generating more-parameters chaos key, speech signal encryption transmission system is constructed for signal encryption, modulation, and signal demodula- tion and decryption simulation processing in the receiver. The experimental results show that the application of this method in- creases the number of key parameters and encryption system has higher security and confidentiality performance, which is better applied to encryption communication.

关 键 词：混沌映射 过抽样Chebyshev映射 过抽样Logistic映射 加密 系统仿真 

分 类 号：TN918.91[电子电信—通信与信息系统]