自相关级联混沌振子法实现随相弱正弦信号的检测  

Detection of Phase Randomly Distributed Weak Sinusoidal Signal Based on Autocorrelation Joint with Chaotic Oscillator Method

作　　者：李健[1,2] 周激流[1] 孙涛[1] 任磊磊[1] 

机构地区：[1]四川大学电子信息学院,四川成都610064 [2]西南交通大学信息编码与传输四川省重点实验室,四川成都610031

出　　处：《四川大学学报（工程科学版）》2010年第1期191-195,共5页Journal of Sichuan University (Engineering Science Edition)

基　　金：四川省科技厅应用基础项目(2008JY0048);西南交通大学信息编码与传输四川省重点实验室开放研究基金资助项目(LF08007)

摘　　要：为了全面考查混沌振子系统的检测能力,改善系统的检测性能并实现随机相位微弱正弦信号的检测,通过Monte-Carlo仿真得到了系统的检测性能,提出了自相关与混沌振子相结合的检测方法。首先对接收信号进行自相关,故意失掉相位信息并抑制部分噪声,从而使自相关结果即送入混沌振子的信号变为了信噪比得到增强的0初相正弦信号,采用一个方程就可实现检测。避免了方程组的方法,不仅降低了检测的复杂度,也提高了检测性能,Monte-Carlo仿真证明了联合检测系统提高了对微弱信号的检测能力。In order to check the detection ability of chaotic oscillator system thoroughly, improve the detection performance and realize the detection of phase randomly distributed weak sinusoidal signal, the detection performance was studied by Monte-Carlo simulation, and the autocorrelation joint with chaotic oscillator detection method was proposed. The autocorrelation was performed to the received signal in order to lose the phase information and suppress a portion of noise, and the result of the autocorrelation was changed into the sine signal whose SNR was improved and initial phase was O, then the detection was realized by using one equation. The equation group method was avoided, not only the complexity of detection was lowered, but also the detection performance was improved. Monte-Carlo simulation proved that the weak signal detection capability was improved by using the union detection system.

关 键 词：自相关 混沌振子 正弦信号检测 

分 类 号：TN911.7[电子电信—通信与信息系统]