1. A method for detecting a delimiter pattern in a signal stream, wherein the signal stream contains a carrier or subcarrier modulated by the delimiter pattern, wherein the method comprises: specifying an expected delimiter occurrence time of an occurrence of the delimiter pattern and a tolerance zone (tz) within which the expected delimiter occurrence time may jitter; approximating, within the tolerance zone, a zero of a cross correlation function (CCF) of the data stream with the delimiter pattern, or detecting the phase of the carrier or subcarrier in respect to an arbitrarily defined reference position within the tolerance zone (tz), e.g. in respect to the expected delimiter occurrence time; calculating a first maximum of the cross correlation function (CCF) within the tolerance zone (tz) by use of the approximated zero or phase; calculating all other maxima of the cross correlation function (CCF) within the tolerance zone (tz); detecting the highest maximum among the calculated maxima, which highest maximum is representative for the moment in time of the occurrence of the delimiter pattern.