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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100 (2011-12-05)
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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
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2 "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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3
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4 <html lang="en">
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5 <head>
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6 <meta name="generator" content=
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7 "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org">
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8 <meta http-equiv="Content-Type" content=
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9 "text/html; charset=us-ascii">
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10
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11 <title>Power Spectral Density estimation (LTPDA Toolbox)</title>
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12 <link rel="stylesheet" href="docstyle.css" type="text/css">
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13 <meta name="generator" content="DocBook XSL Stylesheets V1.52.2">
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14 <meta name="description" content=
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15 "Presents an overview of the features, system requirements, and starting the toolbox.">
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16 </head>
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18 <body>
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19 <a name="top_of_page" id="top_of_page"></a>
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20
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21 <p style="font-size:1px;">&nbsp;</p>
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22
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23 <table class="nav" summary="Navigation aid" border="0" width=
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24 "100%" cellpadding="0" cellspacing="0">
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25 <tr>
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26 <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td>
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27
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28 <td valign="baseline" align="right"><a href=
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29 "ltpda_training_topic_3.html"><img src="b_prev.gif" border="0" align=
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30 "bottom" alt="Topic 3 - Spectral Analysis"></a>&nbsp;&nbsp;&nbsp;<a href=
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31 "ltpda_training_topic_3_2_1.html"><img src="b_next.gif" border="0" align=
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32 "bottom" alt="Example 1: Simply PSD"></a></td>
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33 </tr>
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34 </table>
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35
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36 <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Power Spectral Density estimation</h1>
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37 <hr>
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38
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39 <p>
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40 <p>In this subsection we will focus on the evaluation of the PSD
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41 (Power Spectral Density) for a given time-series signal. The
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42 functionality is provided by a method of the <tt>ao</tt> class called
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43 <p>
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44 <table cellspacing="0" class="note" summary="Note" cellpadding="5" border="1">
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45 <tr width="90%">
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46 <td>
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47 <tt>ao/psd</tt>
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48 </td>
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49 </tr>
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50 </table>
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51 </p>
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52 which implements the Welch method of averaging modified periodograms (also referred to
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53 as WOSA). More details can found in the dedicated <a href="sigproc_psd.html" >section</a> of the user manual.
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54 </p>
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55 <p>In this tutorial, we propose the following exercises based on the
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56 estimation of the PSD of suitable time-series data:</p>
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57 <p>
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58 <ol>
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59 <li><a href="ltpda_training_topic_3_2_1.html" >Simply PSD</a>: a very basic starting exercise</li>
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60 <li><a href="ltpda_training_topic_3_2_2.html" >Windowing data</a>: introducing the usage of segment averaging/windwing/detrending</li>
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61 <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>
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62 </ol></p>
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63
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64 </p>
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65
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66 <br>
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67 <br>
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68 <table class="nav" summary="Navigation aid" border="0" width=
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69 "100%" cellpadding="0" cellspacing="0">
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70 <tr valign="top">
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71 <td align="left" width="20"><a href="ltpda_training_topic_3.html"><img src=
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72 "b_prev.gif" border="0" align="bottom" alt=
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73 "Topic 3 - Spectral Analysis"></a>&nbsp;</td>
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74
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75 <td align="left">Topic 3 - Spectral Analysis</td>
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76
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77 <td>&nbsp;</td>
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78
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79 <td align="right">Example 1: Simply PSD</td>
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80
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81 <td align="right" width="20"><a href=
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82 "ltpda_training_topic_3_2_1.html"><img src="b_next.gif" border="0" align=
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83 "bottom" alt="Example 1: Simply PSD"></a></td>
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84 </tr>
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85 </table><br>
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86
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87 <p class="copy">&copy;LTP Team</p>
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88 </body>
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89 </html>