Use of discrete Hilbert transformation for automatic spike mapping: A methodological investigation
- 1 May 1991
- journal article
- Published by Springer Nature in Medical & Biological Engineering & Computing
- Vol. 29 (3) , 242-248
- https://doi.org/10.1007/bf02446705
Abstract
On the basis of discrete Hilbert transform (DHT) realised by fast Fourier transform (FFT), a new strategy for automatic spike mapping is introduced. The further computation of the EEG time series after DHT results in the time series of the momentary power and the momentary frequency. Both are used for the solution of the main requirements of automatic spike mapping. The spike-mapping concept introduced meets the requirements of efficient automatic spike detection and also has an insensitivity with regard to EMG interference and transient signal components, a frequent cause of false positive detections. Additionally, there are advantages if the momentary power of the spike is mapped instead of the spike potential. the use of momentary power makes a combination of power spectral mapping and spikemapping strategies possible.Keywords
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