Measurements with Noise-Induced Biosignals Exemplified for ECG Recordings
Biosignals arrive a computer system either as a continuous data stream from a sensory input, or as a section of finite length of such a stream recorded on a storage device. Their analysis rests on measurement results gained from recognized waves like duration and amplitude. It is a characteristic feature of biosignals that they are overlapped with noise and other kinds of distortions. Although the signal quality can be improved up to a certain degree by filtering, always residue distortions will remain. A measurement procedure must therefore accepts perturbations. The paper deals with the consequences which follow from this requirement using the ECG measurement as guideline.
