On a modified algorithm for the autoregressive recovery of the acoustic impedance
On a modified algorithm for the autoregressive recovery of the acoustic impedance
复制标题
声阻抗自回归恢复的改进算法
DOI：
10.1190/1.1441635
复制
发表时间：
1984
期刊：
影响因子：
3.3
通讯作者：
C. Walker
中科院分区：
文献类型：
--
作者：
T. Ulrych;C. Walker
在最近的一篇论文中，Walker和Ulrych(1983)提出了一种从带限地震反射记录中恢复声阻抗的算法。所使用的方法是基于数据的带限频率变换的自回归(AR)建模。该建模过程允许预测高和低丢失频率。通过将低频作为以零频率为中心的缺失数据的间隙来确定在声阻抗反演中特别重要的低频。当已知光谱数据被建模为AR过程时，通过最小化向前和向后预测误差的平方和来填补这一空白。
In a recent paper, Walker and Ulrych (1983) presented an algorithm for the recovery of the acoustic impedance from band‐limited seismic reflection records. The approach used is based on the autoregressive (AR) modeling of the band‐limited frequency transform of the data. This modeling procedure allows prediction of both the high and low missing frequencies. The low frequencies, which are particularly important in the inversion for the acoustic impedance, are determined by considering the low‐frequency band as a gap of missing data which is centered at zero frequency. The gap is filled by minimizing the sum of the squared forward and backward prediction errors which result when the known spectral data are modeled as an AR process.