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Mon, 05 Dec 2011 16:20:06 +0100 (2011-12-05) |
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<h1 class="title"><a name="f3-12899" id="f3-12899"></a>Version 2.0 LTPDA Toolbox Software</h1>
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<p>This table summarizes what's new in Version 2.0:</p>
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<th bgcolor="#B2B2B2" valign="top"><p>New Features and Changes</p></th>
<th bgcolor="#B2B2B2" valign="top"><p>Version Compatibility Considerations</p></th>
<th bgcolor="#B2B2B2" valign="top"><p>Fixed Bugs and Known Problems</p></th>
<th bgcolor="#B2B2B2" valign="top"><p>Related Documentation at Web Site</p></th>
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<td bgcolor="#F2F2F2"><p>Yes<br>Details below</p></td>
<td bgcolor="#F2F2F2"><p>No</p></td>
<td bgcolor="#F2F2F2"><p><a href="https://ed.fbk.eu/ltpda/mantis/login_page.php" target="_top">Bug Reports</a> at Web site</p></td>
<td bgcolor="#F2F2F2"><p>Printable Release Notes: <a href="http://www.lisa.aei-hannover.de/ltpda/downloads/version_2_0/files/change_log_v2.0.pdf" target="_top">PDF</a></p></td>
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<p></p>
<ul>
<li><p><a href="#introduction">Introduction</a></p></li>
<li><p><a href="#newFeatures">New toolbox features and changes</a></p></li>
</ul>
<!-- HEADLINE: Introduction -->
<h3 class="title" id="introduction">Introduction</h3>
<p>There has been a significant amount of work done since V1.9.3.</p>
<!-- HEADLINE: New toolbox features and changes-->
<h3 class="title" id="newFeatures">New toolbox features and changes</h3>
<p>The highlights are:</p>
<ul>
<li><p>A new Graphical Programming interface for the construction of
signal processing pipelines (LTPDAworkbench)</p></li>
<li><p>New data whitening methods are included, <b>ao/whiten1D</b> and
<b>ao/whiten2D</b>.</p></li>
<li>
<p>Most methods of the AO class should now support multiple outputs,
in addition to the vector output. For example, the following are supported:</p>
<ul>
<li><p><b>a = lpsd(b1,b2,b3)</b></p></li>
<li><p><b>[a1,a2,a3] = lpsd(b1,b2,b3)</b></p></li>
</ul>
</li>
<li>
<p>Model fitting tools:</p>
<ul>
<li><p><b>curvefit</b> for doing non-linear least-squares,
now including weights</p></li>
<li><p><b>lscov</b> for doing linear least-squares fitting</p></li>
<li><p><b>straightLineFit</b> is a wrapper of <b>lscov</b> for
fitting data with a straight-line</p></li>
</ul>
</li>
<li><p>Operators, +-.*./*/, all conform to more standard MATLAB type
behaviour. For example, adding a single AO to a vector of AOs results
in a vector of AOs where the single AO is added to each element of the vector.</p></li>
<li><p>Digital filtering with IIR filters now has two possible ways of
applying a bank of filters. By specifying the ‘<b>bank</b>’
parameter, the filters will be applied as a ‘<b>serial</b>’
bank or a ‘<b>parallel</b>’ bank.</p></li>
<li><p>Two new noise-generators are included, <b>noisegen1D</b> and
<b>noisegen2D</b> (which can produce correlated data streams).</p></li>
<li><p>AOs can now be built from a set of built-in models. Users can also
write their own models and point LTPDA to a directory (or more than one)
containing those model files.</p></li>
<li><p>The user preferences of LTPDA are now controlled via a graphical
user interface. To adjust the user preferences, run <b>LTPDAprefs</b>.</p></li>
<li><p>Two new transfer function representations are present as user classes
of this version of the toolbox. The class <b>parfrac</b> allows the
user to build transfer function models that are a series of partial
fractions; the class <b>rational</b> allows the user to build a
transfer function as a rational polynomial in s. Some converters also
exist to go between these and the existing transfer function models,
<b>pzmodel</b> (pole/zero models), <b>miir</b> (IIR filters) and
<b>ssm</b> (state-space models).</p></li>
<li><p>A new method, <b>ao/heterodyne</b>, to heterodyne data at a given
frequency.</p></li>
<li><p>All transfer function representations and digital filters now can
be assigned input and output units. This means that units are now
propagated through fully through any analysis.</p></li>
<li><p>A new <b>rebuild</b> method to rebuild objects from their
self-contained history trees.</p></li>
<li>
<p>New graphical user interfaces</p>
<ul>
<li><p>modelViewer - a viewer for the built-in ao and ssm models</p></li>
<li><p>constructor - a helper for writing object constructors (rewritten)</p></li>
</ul>
</li>
<li><p>New convenient AO methods to apply gain and to add an offset to
data (<b>scale, offset</b>).</p></li>
<li><p>Transfer function estimators now return error terms in the
<b>procinfo</b> field of the result <b>ao</b>.</p></li>
<li><p>Units are not automatically simplified. Instead the user can now
do that on demand with the <b>simplifyYunits</b> method. There are
also methods to convert between Hz and s: <b>HzToS</b> and <b>sToHz</b>.</p></li>
<li><p>Digital IIR filters are now initialised to a state based on the
input data. This should reduce start-up transients.</p></li>
<li><p>Data in AOs can be converted from one type to another using the
new <b>ao/convert</b> method.</p></li>
<li><p>Pole/zero models (<b>pzmodel</b>) now support a delay parameter.</p></li>
</ul>
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