基于多涡卷Jerk-Chua混沌和自编码的扩频码构造方法

为了提高扩频通信系统信息传输的可靠性和安全性，提出一种基于复合多涡卷Jerk-Chua混沌与自编码相融合的扩频码构造算法。首先引用二维Henon变换和离散标准映射的构造思想产生一种新的非线性融合函数，其次通过该融合函数将复合多涡卷Jerk-Chua混沌产生的随机序列与自回归自编码随机序列相融合产生高质量复合随机序列作为新的扩频码。最后通过Matlab仿真测试表明，该算法相比现有方法得到的随机序列复杂度更高、随机性和相关性更好，应用于扩频通信系统中的误码率得到了一定改善，能够满足高安全性和高动态变化环境要求的通信系统信息安全保密的传输。

Construction method of spread spectrum code based on multi scroll Jerk-Chua chaos and self-coded

In order to improve the reliability and safety of information transmission in the spread spectrum communication system, a kind of spreading code constructed by means of a combination of generalized complex multi-scroll Jerk-Chua chaos and self coded is proposed. Firstly a new nonlinear fusion function citing by construct ideas of two-dimensional Henon transform and discrete standard mapping is produced. Then the complex multi-scroll Jerk-Chua chaos sequence is combined with the auto regressive (AR) self-coded sequence by the fusion function to generate a high quality composite random sequence as a new spreading code. Finally Matlab simulation tests show that the algorithm generating random sequence has the higher complexity and the better randomness and correlation compared with existing methods. Bit error rate has been improved in spread spectrum communication system. The transmission of information security under high security and dynamic changing conditions can be met.