基于Duffing振子的梯形增幅波弱信号检测  

Weak trapezoidal increasing signal detection based on Duffing oscillator

作　　者：贺莉[1] 王小敏[1] 

机构地区：[1]西南交通大学信息科学与技术学院,成都610031

出　　处：《计算机应用研究》2011年第2期677-680,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(60903202);国家教育部新教师基金资助项目(20090184120024);西南交通大学基础研究基金资助项目(2008B08)

摘　　要：针对引信产品测试中的非周期梯形增幅波信号提出了基于Duffing振子的梯形增幅波弱信号检测的新方法。该方法利用梯形增幅信号的特征进行分段预处理,将非周期信号的检测转换为Duffing振子的准周期信号检测,避免了低信噪比下基于Duffing振子的微弱非周期信号检测受混沌振子检测机理的限制这一难点。仿真实验证明,该方法有效地检测出了低信噪比下的微弱非周期梯形增幅信号。结果表明,该方法能有效检测出引信测试中的梯形增幅波信号,并对零均值色噪声具有较强的抑制能力。In order to detect non-periodic trapezoidal increasing signal which was in fuse test signal,this paper proposed a new method to detect the weak non-periodic trapezoidal increasing signal by using Duffing oscillator under strong background noise.The method divided the signal into sections according to the characteristic of the trapezoidal increasing signal,transformed the non-periodic signal to periodic signal.It avoided the fact that the detection for non-periodic signal was extremely limited based on Duffing.Simulation experiments show that the method can detect the weak non-periodic trapezoidal increasing signal from the low SNR background effectively.The result shows that this method can effectively detect the trapezoidal increasing signal which is in fuse test signal,and has strong resistance to any colored noise with zero mean value.

关 键 词：梯形增幅信号 混沌 弱信号检测 DUFFING振子 

分 类 号：TN911.23[电子电信—通信与信息系统]