新型的CD-DCSK混沌键控保密通信系统

摘要

As existing chaos keying communication systems had the issues of low data transmission rate and weak system confidentiality, a new kind of chaos shift keying communication system: CD-DCSK(correlation delay-differential chaos shift keying) was presented. At the same time lucubrated and simulated the communication performances of this new system. The theoretical deduction and emulational experimentation analysis verified that CD-DCSK has both merits of high confidentiality of CDSK and low BER of DCSK, and its transmission rate is twice as much as original shift keying schemes. Meanwhile, this new communication scheme perfectly achieved the secrecy transmission of image signal. Therefore, it can be clearly seen that this new system is realizable and has high security.%针对现有混沌键控通信系统存在的数据传输速率低性、安全性差等问题,提出一种新型的混沌键控通信系统——CD-DCSK(相关延迟—差分混沌键控),并对该系统的通信性能进行了深入地仿真分析.验证了改进的CD-DCSK同时兼具CDSK(相关延迟键控)保密性高和DCSK误码率低的优点,并且系统的数据传输速率更是提高到了原有键控方式的2倍.同时利用该新型的键控系统很好地实现了图像数据信号的保密传输,证明本系统在数字保密通信中的可实现性和高安全性.