信号与系统课件-第五章

1、Analyzing CT System in Time DomainChapter 5Analyzing CT System in Time DoA system is composed with many components which are relation with one another.A system means a special function.A system can be represent by mathematic formulas.ConceptsA system is composed with many5.1 System Properties1. Caus

2、ality A system is causal if the output does not anticipate future values of the input, i.e., if the output at any time depends only on values of the input up to that time. All real-time physical systems are causal, because time only moves forward. Effect occurs after cause.5.1 System Properties1. Ca

3、usalExamplesExamples信号与系统课件-第五章2. Time-Invariance (TI)A system is time-invariant (TI) if its behavior does not depend on what time it is. 2. Time-Invariance (TI)A syste信号与系统课件-第五章3. LinearityA continuous-time system is linear if it has the superposition property:3. LinearityA continuous-time5.2 Anal

4、yzing CT System In Time DomainThe method can not be involved with any mathematic transform. Only to find solution for differential equations or integral equations. The method shows clear concept.The method needs complex calculation.We do not discuss the method in the course.5.2 Analyzing CT System In TimExamplesExamples信号与系统课件-第五章表示0-到0+的单位跳变函数表示0-到0+的单位跳变函数信号与系统课件-第五章5.3 Analyzing CT System With Convolution5.3 Analyzing CT Sys