# Connexions

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Course by: Richard Baraniuk. E-mail the author

# Preface: Signals and Systems

Module by: Richard Baraniuk. E-mail the author

Summary: This module overviews the course Elec 301 - Signals and Systems - as taught at Rice University in Fall 2003.

In this course, we will learn about signals and systems for processing signals. We will rely heavily on ideas from linear algebra and Hilbert space to unify our treatment of the four fundamental classes of signals - the four combinations of discrete-time vs. continuous-time and periodic/finite vs. aperiodic/infinite.

In contrast to most textbooks, we begin with the discrete Fourier transform for discrete-time, periodic/finite signals. Hence, this course could be subtitled: DFT First. For a more standard treatment starting with continuous-time signals, see the Connexions course Signals and Systems which was used until 2002 and in 2004.

This course also marks the introduction of National Instruments Labview VIs to the Connexions system. Look for them in select modules - they are designed to help students visualize important concepts.

Comments, typos, and suggestions are welcome.

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##### Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

##### What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

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##### What are tags?

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