| 混沌直扩序列的优选及与传统序列的性能比较 |
| |
| 引用本文： | 米良,朱中梁.混沌直扩序列的优选及与传统序列的性能比较[J].系统工程与电子技术,2002,24(8):117-120. |
| |
| 作者姓名： | 米良 朱中梁 |
| |
| 作者单位： | 西南电子电信技术研究所,四川,成都,610041 |
| |
| 基金项目： | 国防抗干扰通信重点试验室预研基金资助课题 (99JS0 4 8 1 JB5 10 1) |
| |
| 摘 要： | 为了提高异步直扩序列码分多址 (DS/CDMA)系统的容量和保密性能 ,从整个扩频序列集合相关函数的均方值出发 ,对一类由一维混沌映射产生的混沌直扩序列与传统的伪随机序列如m序列、Gold序列和Kasami序列等 ,在异步DS/CDMA系统中作了性能比较研究。计算机仿真表明 ,其性能与传统序列相当 ,其序列数较m序列数多 ,适于作CDMA系统的扩频码 ,并由此提出了一种混沌直扩序列的优选方法。
|
| 关 键 词： | 混沌直扩序列 相关特性 混沌映射 |
| 文章编号： | 1001-506X(2002)08-0117-04 |
| 修稿时间： | 2001年7月1日 |
Optimization of Chaotic Direct Spreading Sequences and Comparison of Performances Between Chaotic and Conventional Sequences |
| |
| MI Liang,ZHU Zhong-liang.Optimization of Chaotic Direct Spreading Sequences and Comparison of Performances Between Chaotic and Conventional Sequences[J].System Engineering and Electronics,2002,24(8):117-120. |
| |
| Authors: | MI Liang ZHU Zhong-liang |
| |
| Abstract: | In order to improve the capacity and security of asynchronous direct sequence (DS) code division multiple access (CDMA) system, this paper compares the performance of digital chaotic direct spreading sequences generated by one dimensional chaotic maps with that of the conventional pseudo noise (PN) sequences such as m sequences, Gold sequences and Kasami sequences in the DS/CDMA system based on the mean square values of the aperiodic correlation function of all sequences in the set. By simulation, it shows that their performances are almost identical and the number of the obtained chaotic sequences is larger than that of m sequences. Hence the chaotic sequences are good candidates of spreading sequences for CDMA. A new optimized method of chaotic direct spread spectrum sequences is also proposed. |
| |
| Keywords: | Chaotic direct spreading sequences Correlation function Chaotic map |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
