波数域向下延拓的一种方法

来源期刊：中南大学学报(自然科学版)1983年第1期

论文作者：刘俊森

文章页码：126 - 132

关键词：向下延拓； 波数域； 理论模型； 信号谱； 磁场； 数学期望； 方法； 取样间距； 精度； 压缩比

摘    要：王继伦[1] 1977年提出了一种波数域的下延方法(简称L法)。本文在此基础上,就实践中如何有效地使用L法来提高下延精度,作了进一步探讨。通过理论模型及实测磁场向下延拓计算,说明L法比现有其它下延方法精度都高。本文提出的提高精度的措施,对于波数域其它各种数据处理运算也有参考意义。

Abstract: In 1977, a method of the downward-continuation in the wave-number domain (or Methed L, for short)was advanced by Wang Jilun. On the basis of Method L, how it can be effectively used in practice for increasing the precision of the downward-continuation has been discussed in this paper. The precision of Method L is better than those of other downward-con- tinuation methods, which is illustrated by contrasting the theoretical model calculation value with the theoretical value. These measures of increasing the precision advanced in this paper are of reference value to all kinds of digital processing operations in the wave-number domain.