SETT ATT DETEKTERA MED AVSTAND UPPTREDANDE, VARANDRA LIKNANDE SIGNALER I EN SIGNALBLANDNING

摘要

A periodically occurring signal pattern that is part of a signal mixture including interference components, in particular QRS complexes of fetal heart signals in an abdominally derived fetomaternal electrocardiogram, is detected by storing the amplitude-time waveform pattern of a signal that has initially been recognized according to a first criterion, preferably an amplitude criterion, in a memory and then using this pattern for identifying subsequent signals according to a second criterion which is the degree of coincidence of the signal in question with the amplitude shape of the stored pattern.