TY - GEN
T1 - Application of linearly-constrained prewhitening beamformer to reconstruction of highly correlated EEG signal sources
AU - Sasayama, Teruyoshi
AU - Hamada, Shoji
AU - Kobayashi, Tetsuo
PY - 2011
Y1 - 2011
N2 - In this study, we compared the performances of minimum variance beamformer (MVBF), linearly-constrained (LC)-MVBF, prewhitening beamformer (PWBF), and LC-PWBF with regard to the estimation of signal location in the brain neocortex. Equivalent current dipoles were located in the primary motor cortex in performed numerical simulations by considering applications in brain-computer interfaces based on modulation of μ and β rhythms. It was confirmed that when the signals were highly correlated, the location bias of LC-PWBF was smaller than that of MVBF, LC-MVBF, and PWBF. Obtained results suggest that LC-PWBF is useful for estimating the location of signal sources that are highly correlated and have low signal-to-noise ratio.
AB - In this study, we compared the performances of minimum variance beamformer (MVBF), linearly-constrained (LC)-MVBF, prewhitening beamformer (PWBF), and LC-PWBF with regard to the estimation of signal location in the brain neocortex. Equivalent current dipoles were located in the primary motor cortex in performed numerical simulations by considering applications in brain-computer interfaces based on modulation of μ and β rhythms. It was confirmed that when the signals were highly correlated, the location bias of LC-PWBF was smaller than that of MVBF, LC-MVBF, and PWBF. Obtained results suggest that LC-PWBF is useful for estimating the location of signal sources that are highly correlated and have low signal-to-noise ratio.
UR - http://www.scopus.com/inward/record.url?scp=79959975703&partnerID=8YFLogxK
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U2 - 10.1109/ICCME.2011.5876810
DO - 10.1109/ICCME.2011.5876810
M3 - Conference contribution
AN - SCOPUS:79959975703
SN - 9781424493241
T3 - 2011 IEEE/ICME International Conference on Complex Medical Engineering, CME 2011
SP - 593
EP - 598
BT - 2011 IEEE/ICME International Conference on Complex Medical Engineering, CME 2011
T2 - 2011 5th IEEE/ICME International Conference on Complex Medical Engineering, CME 2011
Y2 - 22 May 2011 through 25 May 2011
ER -