自相关级联混沌振子法实现随相弱正弦信号的检测
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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 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.
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.
引文
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[9]Zhao Xueping.Propagation characteristics for seismic wave and study on the chaotic vibrator detection method for weak signal in seismic prospecting[D].Jilin:Jilin University,2006.[赵雪平.地震波传播性质及地震勘探弱信号的混沌振子检测方法研究[D].吉林:吉林大学,2006.]
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[2]Wang G Y,Chen D J,Lin J Y,et al.The application of cha-otic oscillators to weak signal detection[J].IEEE Trans.on industrial Electronics,1999,46(2):440-444.
[3]Wang Guanyu,Zheng Wei,He Sailing,et al.Estimation of amplitude and phase of a weak signal by using the property of sensitive dependence on initial conditions of a nonlinear oscillator[J].Signal Processing,2002,82:103-115.
[4]Li yue,yang Baojun,Shi Yaowu.Chaos-basedweak sinu-soidal signal detection approach under colored noise back-ground[J].Acta Physica Sinica,2003,52(3):526-530.[李月,杨宝俊,石要武.色噪声背景下微弱正弦信号的混沌检测[J].物理学报,2003,52(3):526-530.]
[5]Li yue,yang Baojun,Shi Yaowu,et al.Theapplication of the chaotic oscillator to the weak sine signal detection in strong noise[J].Acta Scientiarum Natuealium Universititus Jilin-ensis,2001,135(1):75-77.[李月,杨宝俊,石要武,等.混沌振子用于强噪声下微弱正弦信号的检测[J].吉林大学:自然科学学报,2001,135(1):75-77.]
[6]Li Jian,Zhou Jiliu,He Kun,et al.Detection of phase ran-domly distributed weak transient signal using chaos[J].Journal of Systems Engineering and Electronics,2005,16(3):527-533.
[7]Li Jian,He Kun,Qiao Qiang,et al.Detection of a weak signal u-sing chaotic systems[J].Journal of Sichuan University:Natural Science Edition,2004,41(6):1180-1183.[李健,何坤,乔强,等.应用混沌系统实现弱信号的检测[J].四川大学学报:自然科学版,2004,41(6):1180-1183.]
[8]Zhang Shuqing,Jiang Wanlu,Wang Yutian.Chaos theory for weak signal detecting in high noise environment and its application in ultrasonic wave detection[J].Journal of E-lectronic Measurement and Instrument,2001,15(2):11-14.[张淑清,姜万录,王玉田.强噪声中弱信号检测的混沌方法及超声系统的实现[J].电子测量与仪器学报,2001,15(2):11-14.]
[9]Zhao Xueping.Propagation characteristics for seismic wave and study on the chaotic vibrator detection method for weak signal in seismic prospecting[D].Jilin:Jilin University,2006.[赵雪平.地震波传播性质及地震勘探弱信号的混沌振子检测方法研究[D].吉林:吉林大学,2006.]
[10]Nie Chunyan,Shi Yaowu,The research of weak signal de-tection based on cross-correlation and chaos theory[J].Chinese Journal of Scientific Instrument,2001,22(1):32-35.[聂春燕,石要武.基于互相关检测和混沌理论的弱信号检测方法研究[J].仪器仪表学报,2001,22(1):32-35.]
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