Performance degradation of the coherent averaging technique by a molding effect
- 1 January 1989
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Biomedical Engineering
- Vol. 36 (8) , 856-858
- https://doi.org/10.1109/10.30812
Abstract
In coherent averaging, we show that when temporal alignment is performed by matched filtering, the SNR improvement may reach a stable limit after a certain number of averaged events. The source of this degradation lies in the noise that can be contained in the template of the matched filter. This effect depends on the SNR and the morphology of the signal and it can be reduced by a multipass averaging procedure or by a template updating technique.Keywords
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