第 41 卷第5 期 电子科技大学学报 Vo l . 4 1 N o . 5
2012年9月 Journal of University of Electronic Science and Technology of China Sep. 2012
微弱直接序列扩频信号
Duffing
振子检测方法研究
盛广铭,马德保
(解放军信息工程大学信息技术学院 郑州 450002)
【摘要】
Duffing
系统对特定信号敏感及对噪声免疫的特性,使其在微弱信号检测中具有潜在应用。该文针对
Duffing
振子
的分岔问题,通过对Duffing系统Feigenbaum行为的分析,导出了在微弱直接序列扩频信号检测中Duffing系统所表现出的间歇
性混沌行为,提出了一种新的基于间歇性混沌行为的微弱直扩信号检测方法。通过仿真实验,验证了该方法的有效性。
关键词混沌系统; 直接序列扩频信号; Duffing振子; 大尺度周期; 信号检测
中图分类号 TN975 文献标识码 A doi:10.3969/j.issn.1001-0548.2012.05.010
Method for
eak DSSS Si
nal Detecter Based on Duffin
Oscillator
SHENG Guang-ming and MA Zhen-bao
( School of Information Technology, Information Engineering University Zhengzhou 450002)
Abstract Duffing system is sensitive to specific signal and immune against the noise. This characteristic can
be used to detect weak signal. For the fork problem of Duffing oscillator, intermittent chaos action represented by
Duffing system in weak direct sequence spread spectrum (DSSS) signal detection is deduced through analyzing the
Duffing system and Feigenbaum action. A new method based on intermittent chaotic action is proposed for weak
DSSS signal detection. Finally, simulation experiment shows the validity of this method.
Key words chaotic systems; direct sequence spread spectrum; Duffing oscillator; large-scale periodic;
signal detection
收稿日期:2010 07 15; 修回日期:2012 05 17
基金项目:部级预研项目
作者简介:盛广铭(1960 ),男,博士,主要从事信息工程方面的研究.