The method which combines crosscorrelationdetection with chaos theory to detect the weak signals relative to central frequency in overvoltage monitoring is proposed in the paper.
提出将互相关检测和混沌理论相结合应用于过电压监测中的频率跟踪，检测相对于中心频率极小的微弱信号。
2
A detection method for weak signal with coherence average is presented, and the principle of cross-correlationdetection is introduced.
提出了采用相干平均法提高信号的信噪比并检测微弱信号的方法，介绍了相关检测的原理。
3
A new method for image sequence object detection based on the normalized crosscorrelation coefficient is proposed.