A unified approach to the design of linear constraints in minimum variance adaptive beamformers

1992 ◽  
Vol 40 (12) ◽  
pp. 1533-1542 ◽  
Author(s):  
C.-Y. Tseng ◽  
L.J. Griffiths
Keyword(s):  
Minimum Variance ◽  
Linear Constraints ◽  
Unified Approach

Application of Prewhitening Beamformer with Linear Constraints for Correlated EEG Signal Source Estimation

2013 ◽  
pp. 243-254
Author(s):  
Teruyoshi Sasayama ◽  
Shoji Hamada ◽  
Tetsuo Kobayashi
Keyword(s):  
Primary Motor Cortex ◽  
Signal To Noise Ratio ◽  
Minimum Variance ◽  
Linear Constraints ◽  
Eeg Signal ◽  
Source Estimation ◽  
Linearly Constrained ◽  
Highly Correlated ◽  
Signal Sources ◽  
Correlated Signals

To investigate the effect of signal correlation, the authors compared the relative abilities to estimate the source of an ERD/ERS signal among minimum variance beamformer (MVBF), linearly constrained (LC)-MVBF, prewhitening beamformer (PWBF), and LC-PWBF during the measurement of correlated signals. In numerical simulations, equivalent current dipoles were placed in the primary motor cortex to detect the modulation of µ and ß rhythms. It was confirmed that the location bias of LC-PWBF was smaller than that of MVBF, LC-MVBF, and PWBF. These 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.

A Unified Approach to Study the Thermal Dynamics in Multilongitudinal Mode Semiconductor Lasers

2001 ◽  
Vol 20 (2) ◽  
pp. 159-169 ◽  
Author(s):  
M. Ganesh Madhan ◽  
P. R. Vaya ◽  
N. Gunasekaran
Keyword(s):  
Semiconductor Lasers ◽  
Unified Approach ◽  
Thermal Dynamics
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