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<body class='hmmessage'><div dir='ltr'><font style="" face="Times New Roman,sans-serif" color="#000000"><br id="FontBreak"></font><br><div><div dir="ltr"><font style="font-size:12pt;" size="3"><font style="" face="Arial, sans-serif">Dear list,</font></font><br><div><div dir="ltr"><div><font face="Arial, sans-serif" size="3"> </font></div><div><font face="Arial, sans-serif" size="3">I need your help to overcome some problems that I met.</font></div><div><font face="Arial, sans-serif" size="3"><br></font></div><div><font face="Arial, sans-serif" size="3">I read the article<i> "Kalman filter parameters </i></font><i style="font-family:Arial, sans-serif;font-size:medium;">as a new feature vector for EEG BCI applications."</i><span style="font-family:Arial, sans-serif;font-size:12pt;"> (Amir Omidvarnia)<br></span></div><div><font face="Arial, sans-serif" size="3">I also tested the algorithm DEKF on Matlab on a portion of the EEG signal</font></div><div><font face="Arial, sans-serif" size="3">(100 points, order 10) to generate the autoregressive matrix. </font></div><div><font style="font-size:12pt;" face="Arial, sans-serif" size="3">As a resulted, I have got a matrix [1 * 10] for each cahnnel.<br></font></div><div><font face="Arial, sans-serif" size="3"><br></font></div><div><font face="Arial, sans-serif" size="3">My questions are:</font></div><div><font face="Arial, sans-serif" size="3"><br></font></div><div><font face="Arial, sans-serif" size="3">knowing that the EEG signal is a non-periodic and non-stationary signal, </font></div><div><font face="Arial, sans-serif" size="3">how can we apply there the Kalman filter?</font></div><div><font face="Arial, sans-serif" size="3"><br></font></div><div><font face="Arial, sans-serif" size="3">From the </font><span style="font-family:Arial, sans-serif;font-size:12pt;">AR</span><span style="font-family:Arial, sans-serif;font-size:12pt;"> </span><span style="font-family:Arial, sans-serif;font-size:12pt;">matrix, how can we regain the starting signal (I used </span><span style="font-family:Arial, sans-serif;"> 'filter'</span><span style="font-family:Arial, sans-serif;font-size:12pt;"> function under matlab but it does not give the desired result)?</span></div><div><span style="font-family:Arial, sans-serif;font-size:12pt;"><br></span></div><div><font face="Arial, sans-serif" size="3">Finally, do you have an idea about the decomposition of the EEG signal in Fourier series?</font></div><div><font face="Arial, sans-serif" size="3"><br></font></div><div><font face="Arial, sans-serif" size="3">Thank you in advance for your answers.</font></div><div><font face="Arial, sans-serif" size="3"><br></font></div><div><font face="Arial, sans-serif" size="3">cordially,</font></div><br><div><font style="background-color:rgb(255, 255, 255);" face="Comic Sans MS" color="#666666" size="2">----------------------------------------------------------</font></div><div><font style="background-color:rgb(255, 255, 255);" face="Comic Sans MS" color="#666666" size="2">----------------------------------------------------------</font></div><font style="background-color:rgb(255, 255, 255);" face="Comic Sans MS" color="#666666" size="2">Ibtissem KHOUAJA BENFRADJ</font><div><span style="background-color:rgb(255, 255, 255);"><font face="Comic Sans MS" color="#666666" size="2">PhD in computer science</font></span></div><div><span style="background-color:rgb(255, 255, 255);"><font face="Comic Sans MS" color="#666666" size="2">Speciality Signal Processing</font></span></div><div><span style="background-color:rgb(255, 255, 255);"><font face="Comic Sans MS" color="#666666" size="2">Laboratory LTIM, University of Monastir, Tunisia</font></span></div><div><a href="http://www.labtim.org/accueil.php" target="_blank"><font style="background-color:rgb(255, 255, 255);" face="Comic Sans MS" color="#666666" size="2">http://www.labtim.org/accueil.php</font></a></div><div><span style="background-color:rgb(255, 255, 255);"><font face="Comic Sans MS" color="#666666" size="2">Laboratory LIGM, Univerisity of Paris-East, France </font></span></div><div><a href="http://ligm.u-pem.fr/" target="_blank"><font style="background-color:rgb(255, 255, 255);" face="Comic Sans MS" color="#666666" size="2">http://ligm.u-pem.fr/</font></a></div><div><span style="background-color:rgb(255, 255, 255);"><font face="Comic Sans MS" color="#666666" size="2"><br></font></span></div><div><span style="font-size:12pt;"><br></span></div> </div></div> </div></div> </div></body>
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