Abstract:In the calculation of phase spectrum,it is often necessary to densify computing points in frequency domain,but mistakes occur when densified points are not sufficient, The method presented in this paper is to compute phase spectrum respectively at each frequency value without densifying computing points,Under the condition of minimum phase,phase spectrum can be repre-sented by trigonometric function;under the maximum phase circumstances the phase spectrum may be expressed as the sum of trigonometric series and a linear item;in case of mixed phase,the phase spectrum should be expressed in this way;first, mixed phase is separated into minimum phase factor and maximum phase factor, then the phase spectrum is expressl as a sum of trigonometric series and linear items,The method for separating minimum and maximum phase factors is given in this paper,The approximate value of phase can be obtained by taking several items at the begining of a trigonometric series, then the main value of a phase spectrum can be immediatelyconverted into it's true value by means of ?this approximate value.
引用本文:
俞寿朋. 相位谱及其计算[J]. 石油地球物理勘探, 1981, 16(5): 1-14.
Yu Shou-peng. The phase spectrum and it’s calculation. OGP, 1981, 16(5): 1-14.