Mercurial > hg > ltpda
diff m-toolbox/html_help/help/ug/specwin_description.html @ 0:f0afece42f48
Import.
| author | Daniele Nicolodi <nicolodi@science.unitn.it> |
|---|---|
| date | Wed, 23 Nov 2011 19:22:13 +0100 |
| parents | |
| children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/m-toolbox/html_help/help/ug/specwin_description.html Wed Nov 23 19:22:13 2011 +0100 @@ -0,0 +1,567 @@ +<!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>What are LTPDA spectral windows? (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= + "specwin.html"><img src="b_prev.gif" border="0" align= + "bottom" alt="Spectral Windows"></a> <a href= + "specwin_using.html"><img src="b_next.gif" border="0" align= + "bottom" alt="Using spectral windows"></a></td> + </tr> + </table> + + <h1 class="title"><a name="f3-12899" id="f3-12899"></a>What are LTPDA spectral windows?</h1> + <hr> + + <p> + <p> + MATLAB already contains a number of window functions suitable for spectral analysis. However, + these functions simply return vectors of window samples; no additional information is given. + It is also desirable to have more information about a window function, for example, its normalised + equivalent noise bandwidth (NENBW), its peak side-lobe level (PSLL), and its recommended overlap + (ROV). + </p> + <p> + The <a href="class_desc_specwin.html"><tt>specwin</tt></a> class implements many window + functions as class objects that contain many descriptive properties. The following table lists + the available window functions and some of their properties: + </p> + <div align="center"> + <table cellspacing="0" class="body" cellpadding="4" border="2"> + <colgroup> + <col width="37%"> + <col width="63%"> + </colgroup> + <thead> + <tr valign="top"> + <th bgcolor="#B2B2B2">Window name</th> + <th bgcolor="#B2B2B2">NENBW</th> + <th bgcolor="#B2B2B2">PSLL [dB]</th> + <th bgcolor="#B2B2B2">ROV [%]</th> + </tr> + </thead> + <tbody> + <!-- Rectangular --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Rectangular</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.000</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-13.3</p> + </td> + <td bgcolor="#F2F2F2"> + <p>0.0</p> + </td> + </tr> + <!-- Welch --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Welch</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.200</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-21.3</p> + </td> + <td bgcolor="#F2F2F2"> + <p>29.3</p> + </td> + </tr> + <!-- Bartlett --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Bartlett</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.333</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-26.5</p> + </td> + <td bgcolor="#F2F2F2"> + <p>50.0</p> + </td> + </tr> + <!-- Hanning --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Hanning</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.500</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-31.5</p> + </td> + <td bgcolor="#F2F2F2"> + <p>50.0</p> + </td> + </tr> + <!-- Hamming --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Hamming</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.363</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-42.7</p> + </td> + <td bgcolor="#F2F2F2"> + <p>50.0</p> + </td> + </tr> + <!-- Nuttall3 --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Nuttall3</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.944</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-46.7</p> + </td> + <td bgcolor="#F2F2F2"> + <p>64.7</p> + </td> + </tr> + <!-- Nuttall4 --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Nuttall4</p> + </td> + <td bgcolor="#F2F2F2"> + <p>2.310</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-60.9</p> + </td> + <td bgcolor="#F2F2F2"> + <p>70.5</p> + </td> + </tr> + <!-- Nuttall3a --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Nuttall3a</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.772</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-64.2</p> + </td> + <td bgcolor="#F2F2F2"> + <p>61.2</p> + </td> + </tr> + <!-- Nuttall3b --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Nuttall3b</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.704</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-71.5</p> + </td> + <td bgcolor="#F2F2F2"> + <p>59.8</p> + </td> + </tr> + <!-- Nuttall4a --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Nuttall4a</p> + </td> + <td bgcolor="#F2F2F2"> + <p>2.125</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-82.6</p> + </td> + <td bgcolor="#F2F2F2"> + <p>68.0</p> + </td> + </tr> + <!-- Nuttall4b --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Nuttall4b</p> + </td> + <td bgcolor="#F2F2F2"> + <p>2.021</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-93.3</p> + </td> + <td bgcolor="#F2F2F2"> + <p>66.3</p> + </td> + </tr> + <!-- Nuttall4c --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>Nuttall4c</p> + </td> + <td bgcolor="#F2F2F2"> + <p>1.976</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-98.1</p> + </td> + <td bgcolor="#F2F2F2"> + <p>65.6</p> + </td> + </tr> + <!-- BH92 --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>BH92</p> + </td> + <td bgcolor="#F2F2F2"> + <p>2.004</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-92.0</p> + </td> + <td bgcolor="#F2F2F2"> + <p>66.1</p> + </td> + </tr> + <!-- SFT3F --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>SFT3F</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.168</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-31.7</p> + </td> + <td bgcolor="#F2F2F2"> + <p>66.7</p> + </td> + </tr> + <!-- SFT3M --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>SFT3M</p> + </td> + <td bgcolor="#F2F2F2"> + <p>2.945</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-44.2</p> + </td> + <td bgcolor="#F2F2F2"> + <p>65.5</p> + </td> + </tr> + <!-- FTNI --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>FTNI</p> + </td> + <td bgcolor="#F2F2F2"> + <p>2.966</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-44.4</p> + </td> + <td bgcolor="#F2F2F2"> + <p>65.6</p> + </td> + </tr> + <!-- SFT4F --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>SFT4F</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.797</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-44.7</p> + </td> + <td bgcolor="#F2F2F2"> + <p>75.0</p> + </td> + </tr> + <!-- SFT5F --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>SFT5F</p> + </td> + <td bgcolor="#F2F2F2"> + <p>4.341</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-57.3</p> + </td> + <td bgcolor="#F2F2F2"> + <p>78.5</p> + </td> + </tr> + <!-- SFT4M --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>SFT4M</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.387</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-66.5</p> + </td> + <td bgcolor="#F2F2F2"> + <p>72.1</p> + </td> + </tr> + <!-- FTHP --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>FTHP</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.428</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-70.4</p> + </td> + <td bgcolor="#F2F2F2"> + <p>72.3</p> + </td> + </tr> + <!-- HFT70 --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT70</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.413</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-70.4</p> + </td> + <td bgcolor="#F2F2F2"> + <p>72.2</p> + </td> + </tr> + <!-- FTSRS --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>FTSRS</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.770</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-76.6</p> + </td> + <td bgcolor="#F2F2F2"> + <p>75.4</p> + </td> + </tr> + <!-- SFT5M --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>SFT5M</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.885</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-89.9</p> + </td> + <td bgcolor="#F2F2F2"> + <p>76.0</p> + </td> + </tr> + <!-- HFT90D --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT90D</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.883</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-90.2</p> + </td> + <td bgcolor="#F2F2F2"> + <p>76.0</p> + </td> + </tr> + <!-- HFT95 --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT95</p> + </td> + <td bgcolor="#F2F2F2"> + <p>3.811</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-95.0</p> + </td> + <td bgcolor="#F2F2F2"> + <p>75.6</p> + </td> + </tr> + <!-- HFT116D --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT116D</p> + </td> + <td bgcolor="#F2F2F2"> + <p>4.219</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-116.8</p> + </td> + <td bgcolor="#F2F2F2"> + <p>78.2</p> + </td> + </tr> + <!-- HFT144D --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT144D</p> + </td> + <td bgcolor="#F2F2F2"> + <p>4.539</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-114.1</p> + </td> + <td bgcolor="#F2F2F2"> + <p>79.9</p> + </td> + </tr> + <!-- HFT169D --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT169D</p> + </td> + <td bgcolor="#F2F2F2"> + <p>4.835</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-169.5</p> + </td> + <td bgcolor="#F2F2F2"> + <p>81.2</p> + </td> + </tr> + <!-- HFT196D --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT196D</p> + </td> + <td bgcolor="#F2F2F2"> + <p>5.113</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-196.2</p> + </td> + <td bgcolor="#F2F2F2"> + <p>82.3</p> + </td> + </tr> + <!-- HFT223D --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT223D</p> + </td> + <td bgcolor="#F2F2F2"> + <p>5.389</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-223.0</p> + </td> + <td bgcolor="#F2F2F2"> + <p>83.3</p> + </td> + </tr> + <!-- HFT248D --> + <tr valign="top"> + <td bgcolor="#F2F2F2"> + <p>HFT248D</p> + </td> + <td bgcolor="#F2F2F2"> + <p>5.651</p> + </td> + <td bgcolor="#F2F2F2"> + <p>-248.0</p> + </td> + <td bgcolor="#F2F2F2"> + <p>84.1</p> + </td> + </tr> + + </tbody> + </table> +</div> + <p> + In addition to these 'standard' windows, Kaiser windows can be designed to give a chosen + PSLL. + </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="specwin.html"><img src= + "b_prev.gif" border="0" align="bottom" alt= + "Spectral Windows"></a> </td> + + <td align="left">Spectral Windows</td> + + <td> </td> + + <td align="right">Using spectral windows</td> + + <td align="right" width="20"><a href= + "specwin_using.html"><img src="b_next.gif" border="0" align= + "bottom" alt="Using spectral windows"></a></td> + </tr> + </table><br> + + <p class="copy">©LTP Team</p> +</body> +</html>