Abstract：Some problems in usual minimum entropy deconvolutions are analysed and improved in the following aspects:.The criterion of logarithmic canonical variance modulo is used to eliminatethe negative influence of minimum entropy deconvolution upon weak reflection waves·Zero phase restriction is introduced into deconvolution operator so as to reduce the phase change of input data which is caused by minimum entropy deconvolution.The method for determining iterative initial filter according to the characteristics of Fourier spectrum of input data is given to solve local extremum problem and to speed up convergence.Theoretical and real data processing results show that this method is a satisfac'tory and practical deconvolution method.
