On the Removal of Artifacts of Known-Shape from Noisy Signals

RESUMO

A general method for the estimation and removal of quasi-periodic, artifact-like disturbances from single channel measurements is presented. The method is based on a wavelet template and data-driven template extraction from single channel, noisy signals. The method is tested on an example application in modern neurology. The method is compared to an autoencoder, trained and deployed under idealized conditions, thus acting as reference system. It is found that the proposed method yields signal estimates with median root mean squared error improvement of 33% compared to the baseline, which is 4% more than the autoencoder, while relying on fewer assumptions and parameters, and without the need for any training data.