利用互相关技术，计算信号在不同传感器上的时间延迟，再由平面几何原理，得到波的方位和波速。
With the correlation technique, direction and speed of the infrasound can be calculated by computing the time delay of each detector and by using geometric knowledge.
详细研究了基于快速傅立叶变换(FFT)的数字粒子图象测速技术(DPIV)的互相关算法。
A cross correlation algorithm based on Fast Fourier Transform (FFT) for Digital Particle Image Velocimetry (DPIV) is discussed thoroughly in this paper.
PIV技术是一种基于流场图像互相关分析的二维流场非接触式测试技术。
The particle image velocimetry (PIV) is an effective and non-intrusive technique to measure the planar distribution of velocity in the fluid based on the cross-correlation of flow images.
由于伪随机码固有的测距能力——其长周期和互相关特性，使得在测距距离和精度方面可以同时提高，采用码分多址技术可以实现对多个目标同时进行测控。
As the PN-code high performance of long period and the coherence, the very long distance and high precision ranging can be reached at the same time. Multi-target TT&C can be reached by CDMA of PN.
由于伪随机码固有的测距能力——其长周期和互相关特性，使得在测距距离和精度方面可以同时提高，采用码分多址技术可以实现对多个目标同时进行测控。
As the PN-code high performance of long period and the coherence, the very long distance and high precision ranging can be reached at the same time. Multi-target TT&C can be reached by CDMA of PN.
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