摘要
根据单峰映射产生混沌序列极易被攻击的特点 ,采用高维的混沌系统来设计混沌扩频序列。针对 n维非线性数字滤波器产生序列的周期和分布特性 ,在结构上作了相应的设计。产生序列的数值分析表明 :其性能与理想随机序列一致 ,在系统性能上与传统扩频序列相当。由于混沌扩频序列具有周期任意、码族数目多和保密性好等优点 。
In this paper, a chaos-based sequence generator with the multidimensional chaotic system is designed because the sequence generated by the unimodal map is easy to attack. Some modifications are introduced to the n-dimensional nonlinear digital filters in order to improve the period and distribution property of the resulted sequence. The property of chaotic sequences that are generated is similar to that of PN sequence. The performance of chaotic DSSS systems is close to that of conventional systems. The distinguished advantages of chaotic sequences compared to conventional sequences lie in that they have a large code family, good randomness and high security. Chaotic sequences are thus very suitable for satellite spread spectrum systems.
出处
《解放军理工大学学报（自然科学版）》
EI
2004年第4期34-38,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
关键词
扩频
混沌
非线性数字滤波器
spreading spectrum
chaos
nonlinear digital filters
