滤波原理和一般线性时间不变系统──地震学上用的数字信号处理的基本原理与实例(讲座1)

Basic principle of filter and general linear time invariant systemthe basic principle of digital signal processing used in seismology and practical examples (1)

从滤波和系统理论的一些基本概念出发，介绍了简单的阻容滤波器原理，它的微分方程表达，频率响应函数，传递函数以及在离散数据处理中滤波器的差分方程表达。最后推广到对一般线性时间不变系统的处理。这些概念和原理是数字信号处理的基础。

Starting from some basic concepts of filter and system theory, the paper introduced the principle of a simple RC filter, and its representation of differential equation, frequency response function, transfer function as well as the difference equation representation of filter in discrete data processing, and finally expanding the analysis of the simple system to the treatment to general linear time invariant system. These concepts and principles are basis of digital signal processing.