Title :
Local transform processing of single-trial evoked potential
Author :
Kisilev, Pavel ; Zeevi, Yehoshua Y. ; Pratt, Hillel
Author_Institution :
Dept. of Electr. Eng., Israel Inst. of Technol., Haifa, Israel
Abstract :
An algorithm for estimation and reconstruction of Evoked Potentials (EP), masked by EEG activity and additional sources of clutter and noise is proposed. The local Karhunen-Loeve (LKL) basis, derived from the noisy EP signal, is used for optimal signal representation. The vector space of the noisy signal is decomposed by the LKL transform into two complementary orthogonal subspaces. The EP signal is estimated by modifying the signal subspace components with a Wiener gain function
Keywords :
Karhunen-Loeve transforms; bioelectric potentials; electroencephalography; signal reconstruction; signal representation; vectors; Wiener gain function; complementary orthogonal subspaces; evoked potentials reconstruction; local Karhunen-Loeve basis; local transform processing; signal subspace components; single-trial evoked potential; vector space; Additive noise; Brain modeling; Distortion; Eigenvalues and eigenfunctions; Electroencephalography; Filters; Medical signal detection; Signal processing; Signal to noise ratio; Space technology;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.802505
