User`s guide

ii Contents

Working with Signals

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Signal Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Discrete-Time Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Continuous-Time Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Multichannel Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Benefits of Frame-Based Processing . . . . . . . . . . . . . . . . . . . . . 3-14

Sample Rates and Frame Rates . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Sample Rate and Frame Rate Concepts . . . . . . . . . . . . . . . . . . 3-16

Inspecting Sample Rates and Frame Rates . . . . . . . . . . . . . . . 3-17

Converting Sample Rates and Frame Rates . . . . . . . . . . . . . . 3-20

Changing Frame Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Creating Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

Creating Signals Using Constant Blocks . . . . . . . . . . . . . . . . . 3-33

Creating Signals Using Signal Generator Blocks . . . . . . . . . . 3-36

Creating Signals Using the Signal From Workspace Block . . 3-38

Constructing Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-42

Constructing Multichannel Sample-Based Signals . . . . . . . . . 3-42

Constructing Multichannel Frame-Based Signals . . . . . . . . . . 3-45

Deconstructing Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-54

Deconstructing Multichannel Sample-Based Signals . . . . . . . 3-54

Deconstructing Multichannel Frame-Based Signals . . . . . . . . 3-57

Importing Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62

Importing a Multichannel Sample-Based Signal . . . . . . . . . . . 3-62

Importing a Multichannel Frame-Based Signal . . . . . . . . . . . 3-68

Importing WAV Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-71

Exporting Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-72

Exporting Multichannel Signals . . . . . . . . . . . . . . . . . . . . . . . . 3-72

Exporting and Playing WAV Files . . . . . . . . . . . . . . . . . . . . . . 3-79

Viewing Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-80