EEG and MEG source localization using recursively applied (RAP) MUSIC
- 24 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1201-1207 vol.2
- https://doi.org/10.1109/acssc.1996.599135
Abstract
The multiple signal characterization (MUSIC) algorithm locates multiple asynchronous dipolar sources from electroencephalography (EEG) and magnetoencephalography (MEG) data. A signal subspace is estimated from the data, then the algorithm scans a single dipole model through a three-dimensional head volume and computes projections onto this subspace. To locate the sources, the user must search the head volume for local peaks in the projection metric. We describe a novel extension of this approach which we refer to as RAP (recursively applied) MUSIC. This new procedure automatically extracts the locations of the sources through a recursive use of subspace projections, which uses the metric of principal correlations as a multidimensional form of correlation analysis between the model subspace and the data subspace. The dipolar orientations, a form of "diverse polarization", are easily extracted using the associated principal vectors.Keywords
This publication has 9 references indexed in Scilit:
- Two decades of array signal processing research: the parametric approachIEEE Signal Processing Magazine, 1996
- Improved sequential MUSICIEEE Transactions on Aerospace and Electronic Systems, 1995
- A Sequential Estimation Approach for Performance Improvement of Eigenstructure-Based Methods in Array ProcessingIEEE Transactions on Signal Processing, 1993
- Multiple dipole modeling and localization from spatio-temporal MEG dataIEEE Transactions on Biomedical Engineering, 1992
- Sensor array processing based on subspace fittingIEEE Transactions on Signal Processing, 1991
- Detection and estimation in sensor arrays using weighted subspace fittingIEEE Transactions on Signal Processing, 1991
- Maximum likelihood methods for direction-of-arrival estimationIEEE Transactions on Acoustics, Speech, and Signal Processing, 1990
- Multiple emitter location and signal parameter estimationIEEE Transactions on Antennas and Propagation, 1986
- Direction finding with an array of antennas having diverse polarizationsIEEE Transactions on Antennas and Propagation, 1983