<p>
  Training session 3 is a tutorial of how to estimate spectral
  properties of the signals, employing the instruments provided by the
  LTPDA Toolbox. As described in the devoted User Manual <a
  href="sigproc_spec.html"> section</a>, spectral estimation is a
  branch of the signal processing, performed on data and based on
  frequency-domain techniques.
 </p>
 <p>The focus of the tools is on
  time-series objects, whose spectral content needs to be estimated.
  </p>
<p>
We will learn here how to use the tools to evaluate univariate and
  multivariate analyses. </p>
 <p>  The topic is divided as follows:  
  
  <ul>
    <li><a href="ltpda_training_topic_3_2.html">Exercises on Power
    Spectral Density estimation</a> </li>
    <li><a href="ltpda_training_topic_3_5.html">Exercises on Transfer Functions estimation</a> </li>
    <li><a href="ltpda_training_topic_3_6.html">IFO/Temperature Example -  Spectral Analysis</a> </li>
  </ul>

 </p>