基于多涡卷Jerk-chua混沌吸引子的扩频码构造方法及其应用  

Construction method of spread-spectrum code based on multi-scroll Jerk-chua chaos and its application

作　　者：冯雪[1] 庞尚珍[1] 

机构地区：[1]四川理工学院自动化与电子信息学院,四川自贡643000

出　　处：《自动化与仪器仪表》2017年第7期187-190,共4页Automation & Instrumentation

摘　　要：针对传统扩频码序列存在复杂度低、抗攻击性差等问题,提出一种基于复合多涡卷Jerk-chua混沌吸引子的扩频码构造方法。该方法通过均匀映射产生初始伪随机序列,再与随机短序列复合后重复迭代,从而得到新的扩频序列,该新扩频序列的长度随迭代次数成几何级数增加。通过性能分析,该序列的平衡性得到了很大的改善,复杂度得到了很大的提高。仿真实验表明:所提出的扩频码序列较传统方法在抗多径干扰能力、可承载的用户数和扩频误码率等方面具有更好的效果。In order to resolve low complexity and the low resilience of traditional spreading codes, a new construction method of spread-spectrum code based on multi-scroll Jerk-chua chaos is proposed. The method is based on uniform mapping, generated high quality initial pseudo random sequence, then repeated iteration with the sub-sequence of different length to obtain the new spreading code sequence that it＇ s length increased geometrically by the time of iterations. Performance analyses show that the sequence has better balance and higher complexity. The simulation results show that the new spread spectrum code has a better effect than traditional method in several aspects, such as anti multipath interference ability, carrying more users and spread spectrum bit error rate.

关 键 词：复合多涡卷Jerk—Chua混沌吸引子 均匀映射 扩频序列 误码率 

分 类 号：TN914.42[电子电信—通信与信息系统]