Chapter 4
Discrete-Time Signals and Systems
In This Chapter
Considering the different types of discrete-time signals
Modifying discrete-time sequences
Working with real signals in discrete-time
Checking out discrete-time systems
We live in a continuous-time/analog world; but people increasingly use computers to process continuous signals in the discrete-time domain. From a math standpoint, discrete-time signals and systems can stand alone — independent of their continuous-time counterparts — but that isn’t the intent of this chapter. Instead, I want to show you how discrete-time signals and systems get the job done in a way that’s parallel to the continuous-time description in Chapter 3.
A great deal of innovation takes place in discrete-time signals and systems. High-performance computer hardware combined with sophisticated algorithms offer a lot of flexibility and capability in manipulating discrete-time signals. Computers can carry out realistic simulations, which is a huge help when studying and designing discrete-time signals and systems.
Continuous- and discrete-time signals ...
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