同态反褶积技术在消除浅层效应中的应用

同态反褶积技术可把时间域中褶积组合的信号转换成倒频(quefrency)域中的求和信号,因而在信号分离方面得到了广泛的运用。笔者利用该方法消除地震记录中的浅层效应。文中对该方法经常遇到的三个问题,即相位模糊问题,信号的有限带宽问题及混合相位问题进行了讨论。这些问题可分别通过“自适应数值积分法”,频率变换及信号指数加权得到解决。

APPLICATION OF HOMOMORPHICDECONVOLUTION TECHNIQUE IN ELIMINATING THESHALLOW LAYER EFFECT

By using the homomorphic dcconvolution technique, the convolution of two components of input signals in the time domain can be transformed into an addition in the quefrency domain. Thus the technique has been widely used in signal separations. It is used to eliminate the shallow layer effects on seismic records by the authors. The three problems often encountered by the technique, i. e.,problems of phase blurring, signal band-limitation and mixed-phase signals, have been discussed in the paper. Those difficulties might be overcome by an "adaptive numerical integration algorithm", frequency transformation, and exponential weighting of the signals, respectively.