虚拟仪器Labview：FFT、采样、加窗、互相关分析仪、滤波器、谱分析、随机信号分析仪、信号发生器.exe自谱与自相关分析.exe的可执行程序-FFT, sampling, windowing, cross-correlation analysis instrument, filter, spectrum analysis, the random signal analyzer, signal generator exe autospectrum autocorrelation analysi

基于声卡的数据采集,先是采集时域信号后面做频谱分析最后物理计算，使用时用伪随机信号测量为好。-Data collection based on the sound card, the first is the acquisition time domain signal behind spectrum calculation finally physical analysis, when used with a pseudo random signal as well.

互相关分析，确定两个时间序列之间的相关程度，即描述随机信号x(t),y(t)在任意两个不同时刻t1，t2的取值之间的相关程度。(Cross correlation analysis)