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Chapter 4

Systems and their properties

Two lessons in Part II, Systems. Read them in order, or start anywhere: a prerequisite is a link, never a gate.

Start with 4.1
0 of 2 read2 on the essential pathabout 33 minutes

Lessons in this chapter

The input trace, 16 samples, unchanged by which system is chosen.The input trace, 16 samples, unchanged by which system is chosen.

Lesson 1 Essential15 minYou are hereRead

What is a system?

See a system as a rule that turns one signal into another, built from four blocks you already know.

Input, highlighted samples used by the check instant, n = 6.Input, highlighted samples used by the check instant, n = 6.

Lesson 2 Essential18 minYou are hereRead

System properties

Test a system against six yes/no questions, from "does it need the past" to the pair that defines LTI.

After this chapter

Where to go next.

The chapters either side, and the rest of Part II in the library.

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