Using frequency spectrum analysis of phase function to calculate its auto power spectrum can reflect its frequency structure.
利用相函数的频谱分析求其自功率谱,可以反映它的频率结构。
2
It was found that the transmission spectrumof the filter is the cosine function modulated reflection spectrumof the fiber grating.
结果表明该滤波器的透射光谱是余弦函数调制后的光纤光栅反射光谱。
3
At last, making use of the plotting functionof MATLAB, the paper carries out simulation analysis from three aspects: auto-correlation function, spectrum and fuzzy function.