| 摘要: |
| 为了扩展适合异步CDMA系统的扩谱序列，提高系统的性能，利用混沌序列的类随机、理想的自相关和互相关、易于产生并且数量多的特性，来生成适合异步码分多址系统的混沌扩谱序列。根据异步DS—CDMA系统的模型，分析适合异步CDMA系统的最优混沌扩谱序列的性能优点，提出选择和构造最优二进制混沌扩谱序列的关键指标，并与传统的伪随机序列(如Gold序列)进行数值仿真比较。结果表明应用最优混沌扩谱序列可以增加15％的系统容量。 |
| 关键词: 混沌扩谱序列 异步码分多址 最优二进制混沌扩谱序列 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目:国家自然科学基金资助项目(60076015)，福建省自然科学基金资助项目(A0010019)，福建省高新技术项目 |
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| Optimal Chaotic Binary Spreading Sequences for Asynchronous CDMA System |
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| Abstract: |
| In order to expand the group of sequences and improve the system performance of asynchronous CDMA communication, study on the characteristic of optimal chaotic sequence is conducted. On this base, some criteria on selecting spreading sequences are proposed and implemented to generate binary chaotic spreading sequences with optimal performance. Numerical simulation and statistical analysis show that these sequences are more adapted for asynchronous CDMA system than conventional Gold sequence. |
| Key words: Chaotic spread spetrum sequence,Asynchronous CDMA,Optimal binary chaotic spread spectrum sequence |
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