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author | Daniele Nicolodi <nicolodi@science.unitn.it> |
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date | Mon, 05 Dec 2011 16:20:06 +0100 |
parents | f0afece42f48 |
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd"> <html lang="en"> <head> <meta name="generator" content= "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org"> <meta http-equiv="Content-Type" content= "text/html; charset=us-ascii"> <title>Power Spectral Density estimation (LTPDA Toolbox)</title> <link rel="stylesheet" href="docstyle.css" type="text/css"> <meta name="generator" content="DocBook XSL Stylesheets V1.52.2"> <meta name="description" content= "Presents an overview of the features, system requirements, and starting the toolbox."> </head> <body> <a name="top_of_page" id="top_of_page"></a> <p style="font-size:1px;"> </p> <table class="nav" summary="Navigation aid" border="0" width= "100%" cellpadding="0" cellspacing="0"> <tr> <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td> <td valign="baseline" align="right"><a href= "ltpda_training_topic_3.html"><img src="b_prev.gif" border="0" align= "bottom" alt="Topic 3 - Spectral Analysis"></a> <a href= "ltpda_training_topic_3_2_1.html"><img src="b_next.gif" border="0" align= "bottom" alt="Example 1: Simply PSD"></a></td> </tr> </table> <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Power Spectral Density estimation</h1> <hr> <p> <p>In this subsection we will focus on the evaluation of the PSD (Power Spectral Density) for a given time-series signal. The functionality is provided by a method of the <tt>ao</tt> class called <p> <table cellspacing="0" class="note" summary="Note" cellpadding="5" border="1"> <tr width="90%"> <td> <tt>ao/psd</tt> </td> </tr> </table> </p> which implements the Welch method of averaging modified periodograms (also referred to as WOSA). More details can found in the dedicated <a href="sigproc_psd.html" >section</a> of the user manual. </p> <p>In this tutorial, we propose the following exercises based on the estimation of the PSD of suitable time-series data:</p> <p> <ol> <li><a href="ltpda_training_topic_3_2_1.html" >Simply PSD</a>: a very basic starting exercise</li> <li><a href="ltpda_training_topic_3_2_2.html" >Windowing data</a>: introducing the usage of segment averaging/windwing/detrending</li> <li><a href="ltpda_training_topic_3_2_3.html" >Log-scale PSD on MDC1 data</a>: a "realistic" example from the first LTPDA Mock Data Challenge, employing the log-scale PSD estimation method</li> </ol></p> </p> <br> <br> <table class="nav" summary="Navigation aid" border="0" width= "100%" cellpadding="0" cellspacing="0"> <tr valign="top"> <td align="left" width="20"><a href="ltpda_training_topic_3.html"><img src= "b_prev.gif" border="0" align="bottom" alt= "Topic 3 - Spectral Analysis"></a> </td> <td align="left">Topic 3 - Spectral Analysis</td> <td> </td> <td align="right">Example 1: Simply PSD</td> <td align="right" width="20"><a href= "ltpda_training_topic_3_2_1.html"><img src="b_next.gif" border="0" align= "bottom" alt="Example 1: Simply PSD"></a></td> </tr> </table><br> <p class="copy">©LTP Team</p> </body> </html>