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About: Signal Power

Module by: Don Johnson

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Name: Signal Power
ID: m0062
Language: English (en)
Summary: This module examines signal power, looking at instantaneous and average power. It uses orthogonality properties to derive a simple expression for average power. It also defines and displays a power spectrum.
Subject: Science and Technology
Keywords: average, power, rms, root-mean-square, Signal, spectrum
Document Type: -//CNX//DTD CNXML 0.5 plus MathML//EN
License: Creative Commons Attribution License (CC-BY 1.0)
Authors: Don Johnson (dhj@rice.edu)
Copyright Holders: Don Johnson (dhj@rice.edu)
Maintainers: Don Johnson (dhj@rice.edu), Doug Daniels (ddaniels888@gmail.com)
Version: 2.10 (history)
Created: Aug 10, 2000 12:00 am GMT-5
Revised: Feb 28, 2007 4:37 pm US/Central

Version History

Version: 2.10 Feb 28, 2007 4:37 pm US/Central by Don Johnson
Changes: 
Reader found a misunderstanding in the first paragraph (fixed) and an error in the solution to the first example (fixed).
Version: 2.9 Aug 10, 2004 10:50 am GMT-5 by Elizabeth Gregory
Changes: 
Updated to CNXML 0.5
Version: 2.8 Apr 12, 2002 12:00 am GMT-5 by (Unknown)
Changes: 
edited mathml such as content in presentation, applys around single ci tag, powers marked up as superscripts
Version: 2.7 Sep 11, 2001 12:00 am GMT-5 by Brent Hendricks
Changes: 
Converted to CNXML 0.3.5
Version: 2.6 Jun 5, 2001 12:00 am GMT-5 by (Unknown)
Changes: 
changed emphasis to term on some tags
Version: 2.5 May 30, 2001 12:00 am GMT-5 by (Unknown)
Changes: 
test
Version: 2.4 May 30, 2001 12:00 am GMT-5 by (Unknown)
Changes: 
Updated mathematical notation.
Version: 2.3 May 29, 2001 12:00 am GMT-5 by (Unknown)
Changes: 
I ported all Presentation MathML to Content MathML, and converted CNXML 0.1 to 0.3.  Additionally, I removed two references to Problem 1.1, which is not yet coded into any module.  This was as per a suggestion by Brent.
Version: 2.0 Aug 17, 2000 12:00 am GMT-5 by Brent Hendricks
Changes: 
Bumped version to 2.0

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The following citation styles comply with the attribution requirements for the license (CC-BY 1.0) of this work:

American Chemical Society (ACS) Style Guide:

Johnson, D. Signal Power, Connexions Web site. http://cnx.org/content/m0062/2.10/, Feb 28, 2007.

American Medical Assocation (AMA) Manual of Style:

Johnson D. Signal Power [Connexions Web site]. February 28, 2007. Available at: http://cnx.org/content/m0062/2.10/.

American Psychological Assocation (APA) Publication Manual:

Johnson, D. (2007, February 28). Signal Power. Retrieved from the Connexions Web site: http://cnx.org/content/m0062/2.10/

Chicago Manual of Style (Bibliography):

Johnson, Don. "Signal Power." Connexions. February 28, 2007. http://cnx.org/content/m0062/2.10/.

Chicago Manual of Style (Note):

Don Johnson, "Signal Power," Connexions, February 28, 2007, http://cnx.org/content/m0062/2.10/.

Chicago Manual of Style (Reference, in Author-Date style):

Johnson, D. 2007. Signal Power. Connexions, February 28, 2007. http://cnx.org/content/m0062/2.10/.

Modern Languages Association (MLA) Style Manual:

Johnson, Don. Signal Power. Connexions. 28 Feb. 2007 <http://cnx.org/content/m0062/2.10/>.