主权项 |
1. A signal processing arrangement (130) for processing electrophysiological signals (116, 302) related to uterine contractions of a pregnant woman (202), the signal processing arrangement (130) comprises
an input (132) for receiving an electrophysiological signal (116, 302) that is measured on the abdomen of a pregnant woman (202), a filter (136) for receiving the electrophysiological signal (116, 302) and for providing a filtered electrohysterogram signal (304), the filter (136) being configured to allow a passages of frequencies of the electrophysiological signal (116, 302) in a first frequency range and to attenuate frequencies of the electrophysiological signal (116, 302) outside the first frequency range, the first frequency range is from 0 Hz to 3 Hz, a window function applicator (138) for receiving the filtered electrohysterogram signal (304) and for providing an output waveform (146, 306), the window function applicator (138) is configured to generate the output waveform by continuously applying a window function to samples of the filtered electrohysterogram signal (304), wherein a single application of the window function comprises adding, according to the window function, samples of the filtered electrohysterogram signal (304) of an interval of time preceding the application of the window function, and an output (144) for providing the output waveform (146, 306), the output waveform (146, 306) simulating output data of a tocodynamometer or an intra-uterine pressure catheter, the output data representing data relating to uterine contractions. |