摘要
随着人们对通信容量需求的不断增长,设计具有互相关旁瓣小,数目众多的扩频序列成为研究的热点。将混沌映射引入扩频序列的设计,具有保密能力强,序列数目众多等优点。设计一种新型的基于T an t映射量化的二值混沌序列,给定不同的初值,就可以产生不同的扩频序列,它具有良好的负自相关特性,相对于高斯白序列可以提高14.3%的系统容量。仿真结果显示,仿真结果与理论值接近,非常适合作系统的扩频码。
Chaotic sequences have better capability of keeping secret. In this paper, the designing of chaotic binary spreading sequences with Tant Map-Based negative auto-correlation is discussed. The system capacity of these binary sequences is bigger than Gausswhite sequences by 14.3%. From computer simulations of asynchronous DS-CDMA communications using the designed sequences, we can see that the designed sequences have better performance than Gold sequences, which suggests that they can make better candidates for spreading sequences for asynchronous DS-CDMA systems.
出处
《桂林电子工业学院学报》
2006年第2期85-88,共4页
Journal of Guilin Institute of Electronic Technology
基金
国家自然科学基金资助项目(60472091)
