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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
2 "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
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7 "HTML Tidy for Mac OS X (vers 1st December 2004), see www.w3.org">
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10
11 <title>Power Spectral Density estimation (LTPDA Toolbox)</title>
12 <link rel="stylesheet" href="docstyle.css" type="text/css">
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14 <meta name="description" content=
15 "Presents an overview of the features, system requirements, and starting the toolbox.">
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17
18 <body>
19 <a name="top_of_page" id="top_of_page"></a>
20
21 <p style="font-size:1px;">&nbsp;</p>
22
23 <table class="nav" summary="Navigation aid" border="0" width=
24 "100%" cellpadding="0" cellspacing="0">
25 <tr>
26 <td valign="baseline"><b>LTPDA Toolbox</b></td><td><a href="../helptoc.html">contents</a></td>
27
28 <td valign="baseline" align="right"><a href=
29 "ltpda_training_topic_3.html"><img src="b_prev.gif" border="0" align=
30 "bottom" alt="Topic 3 - Spectral Analysis"></a>&nbsp;&nbsp;&nbsp;<a href=
31 "ltpda_training_topic_3_2_1.html"><img src="b_next.gif" border="0" align=
32 "bottom" alt="Example 1: Simply PSD"></a></td>
33 </tr>
34 </table>
35
36 <h1 class="title"><a name="f3-12899" id="f3-12899"></a>Power Spectral Density estimation</h1>
37 <hr>
38
39 <p>
40 <p>In this subsection we will focus on the evaluation of the PSD
41 (Power Spectral Density) for a given time-series signal. The
42 functionality is provided by a method of the <tt>ao</tt> class called
43 <p>
44 <table cellspacing="0" class="note" summary="Note" cellpadding="5" border="1">
45 <tr width="90%">
46 <td>
47 <tt>ao/psd</tt>
48 </td>
49 </tr>
50 </table>
51 </p>
52 which implements the Welch method of averaging modified periodograms (also referred to
53 as WOSA). More details can found in the dedicated <a href="sigproc_psd.html" >section</a> of the user manual.
54 </p>
55 <p>In this tutorial, we propose the following exercises based on the
56 estimation of the PSD of suitable time-series data:</p>
57 <p>
58 <ol>
59 <li><a href="ltpda_training_topic_3_2_1.html" >Simply PSD</a>: a very basic starting exercise</li>
60 <li><a href="ltpda_training_topic_3_2_2.html" >Windowing data</a>: introducing the usage of segment averaging/windwing/detrending</li>
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>
62 </ol></p>
63
64 </p>
65
66 <br>
67 <br>
68 <table class="nav" summary="Navigation aid" border="0" width=
69 "100%" cellpadding="0" cellspacing="0">
70 <tr valign="top">
71 <td align="left" width="20"><a href="ltpda_training_topic_3.html"><img src=
72 "b_prev.gif" border="0" align="bottom" alt=
73 "Topic 3 - Spectral Analysis"></a>&nbsp;</td>
74
75 <td align="left">Topic 3 - Spectral Analysis</td>
76
77 <td>&nbsp;</td>
78
79 <td align="right">Example 1: Simply PSD</td>
80
81 <td align="right" width="20"><a href=
82 "ltpda_training_topic_3_2_1.html"><img src="b_next.gif" border="0" align=
83 "bottom" alt="Example 1: Simply PSD"></a></td>
84 </tr>
85 </table><br>
86
87 <p class="copy">&copy;LTP Team</p>
88 </body>
89 </html>