Pseudo-Random Sequences Generator Based on Discrete Hyperchaotic Systems  

作　　者：Li Changgang & Han Zhengzhi Department of Automation, Shanghai Jiaotong University, Shanghai 200030, P. R. China 

出　　处：《Journal of Systems Engineering and Electronics》2003年第4期84-89,共6页系统工程与电子技术（英文版）

基　　金：This project was supported by the National Natural Science Foundation of China (69874025).

摘　　要：We first design a discrete hyperchaotic system via piece-wise linear state feedback. The states of the closed loop system are locally expanding in two directions but absolutely bounded on the whole, which implies hyperchaos. Then, we use three suchlike hyperchaotic systems with different feedback gain matrices to design a pseudo-random sequence generator (PRSG). Through a threshold function, three sub-sequences generated from the output of piecewise linear functions are changed into 0-1 sequences. Then, followed by XOR operation, an unpredictable pseudo-random sequence (PRS) is ultimately obtained. The analysis and simulation results indicate that the PRS, generated with hyperchaotic systems, has desirable statistical features.We first design a discrete hyperchaotic system via piece-wise linear state feedback. The states of the closed loop system are locally expanding in two directions but absolutely bounded on the whole, which implies hyperchaos. Then, we use three suchlike hyperchaotic systems with different feedback gain matrices to design a pseudo-random sequence generator (PRSG). Through a threshold function, three sub-sequences generated from the output of piecewise linear functions are changed into 0-1 sequences. Then, followed by XOR operation, an unpredictable pseudo-random sequence (PRS) is ultimately obtained. The analysis and simulation results indicate that the PRS, generated with hyperchaotic systems, has desirable statistical features.

关 键 词：discrete hyperchaotic system piecewise linear state feedback pseudo-random sequences. 

分 类 号：TP11[自动化与计算机技术—控制理论与控制工程]