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(1.四川大学 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)；周激流(四川大学 电子信息学院,四川 成都 610064)；孙涛(四川大学 电子信息学院,四川 成都 610064)；任磊磊(四川大学 电子信息学院,四川 成都 610064)
Author：Li Jian(1.School of Electronics and Info. Eng., Sichuan Univ., Chengdu 610064,China; 2. Key Lab. of Info. Coding and Transmission, Southwest Jiaotong Univ., Chengdu 610031,China)；Zhou Jiliu(School of Electronics and Info. Eng., Sichuan Univ., Chengdu 610064,China)；Sun Tao(School of Electronics and Info. Eng., Sichuan Univ., Chengdu 610064,China)；Ren Leilei(School of Electronics and Info. Eng., Sichuan Univ., Chengdu 610064,China)
收稿日期：2009-01-04 年卷（期）页码：2010,42(1):191-195
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：自相关；混沌振子；正弦信号检测
Key words：autocorrelation;chaotic oscillator; the detection of sinusoidal signal
基金项目：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课题（LF08007）
中文摘要
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。
英文摘要
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 0,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.
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