A detection method for weak signal with coherence average is presented, and the principle of cross-correlation detection 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。
We showed that the laser coherence in time-space is determined principally by longitudinal and cross mode structure of laser.
本文指出激光器的时空相干性，原则上取决于器件的纵模和横模结构。
The main analytical tools utilized in this study are cross wavelet transform and wavelet coherence.
首先使用交叉子波变换与子波相关方法分析了两者的相位关系。
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