Abstract:Interpolation is often required in tlie operation of frequency domain.The paper lists three cases where.interpolation is necessary:case I.operation can not be done without interpolation;case 2.frequency domain computation result being transformed into time domain.interpolation leads to correct result;case 3.interpolation is necessary for ensuring the migration accz}racy in frequency domain.There aret'nree methods of frequency domain interpolation.the first method is employed before Fouriertransform.i.e.replenishing zero samples in time domain;the second method is performed during Fourier transform.i.e.densifying sample points of frequency domain in discrete Fourier transform;the third method is done after Fourier transform.The former two are already in wide use.This paper concentrates on the third method.and derives the function of frequency domain interpolation.the form of which is difrerent from that of time domain interpolation function.
引用本文:
俞寿朋. 频域插值问题[J]. 石油地球物理勘探, 1981, 16(4): 15-26.
Yu Shou-peng. Interpolation in frequency domain. OGP, 1981, 16(4): 15-26.