Patent ID: 7158598

Claim:
A method for identifying a data packet in a data stream in which a d.c. voltage quota for a demodulated digital input signal is calculated in that the input signal is scanned in order to generate a sequence of scanned values and from a selected number of the sequence of scanned values the d.c. voltage quota of the input signal is calculated; a k-bit word is allocated to the input signal for that for each symbol of the input signal corresponding to a bit, a bit value is determined as a function of the d.c. voltage quota; the k-bit word corresponding to the input signal is compared with an expected k-bit synchronization word in order to determine a correlation value; and a packet identification signal is generated if the correlation value is greater than a correlation threshold value; and wherein the d.c. voltage quota of the input signal is calculated again after each scan of the input signal at least until the correlation value determined by comparison of the k-bit word corresponding to the input signal with an expected k-bit synchronization word is greater than the correlation threshold value.