1.1 绪 言

一、信号的概念

二、系统的概念

1.2 信号的描述与分类

一、信号的描述

二、信号的分类

1.3 信号的基本运算

一、加法和乘法

二、时间变换

1.4 阶跃函数和冲激函数

一、阶跃函数

二、冲激函数

-1.1 Introduction of a signal of the concept of the Second, the system the concept of 1.2 signals a descr iption and classification, the descr iption of the second signal, the signal classification of 1.3 signals a basic arithmetic, addition and multiplication Second, the time step function transform 1.4 and Impulse Function First, the Second step function, impulse function