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。
2
According to the cross spectral analysis, there is a high coherence with high confidence at intervals of 11 years between the typhoon's MTCR and the sun spots.
再经过交叉谱分析后指出，台风暴雨的11年周期与太阳黑子数有很高信度的高凝聚值。
3
We showed that the laser coherence in time-space is determined principally by longitudinal and cross mode structure of laser.