Basic knowledge of signals and systems exercises

First, the signal expression

1. Waveform-to-function expressions

Continuous signals generally have continuous function f (t) and waveform (function image)

Answer:

Discrete signals typically have sequence F (t) and sequence images

Answer

2. A known function draws its image

Properties of singular function 1. Step function:

Switching function, switch in the circuit, the function of the gate to limit the signal action time;

Integral

2. Impulse function:

in fact, it is a pulse, the height is infinitely high, the width is infinitely narrow.

Sampling Nature:

Derivative of:

In fact, it is also the evolution of sampling.

Scale transformation:

Third, system representation system is generally used in system diagram representation

The system characteristics are determined 1. Given a system we must first determine its basic properties, linear or non-linear, time-varying or constant, causal or non-causal, stable or unstable system. 2. Determine the linear and time-variant properties of the system as described by differential or differential equations:

                                                                                                                                                             

 

Basic knowledge of signals and systems exercises