Patent ID: 6229471
Filing Date: 2001-05-08
Classification: H04L

Abstract:
A method for detecting a pulsed usable signal, in which an input signal that is limited in frequency is formed from an analog input signal through a filtering that is adapted to the pulsed usable signal to be detected; and the pulsed usable signal is determined from the frequency-limited input signal by an integration process, with said method including:first, forming a series of digital phase values having a predeterminable word length from the frequency-limited input signal through an amplitude-limiting phase/digital conversion;forming a series of first phase difference values (Y=B-A) from each two respectively adjacent phase values;forming a series of second phase differences values from two adjacent first phase differences values the series of first phase difference values through subtraction;forming absolute values associated with the second phase difference values; andsupplying the absolute values to a digital low-pass filter having a predeterminable integration time that is adapted to the pulsed usable signal to be detected, with the pulsed usable signal to be detected being formed at the output of the low-pass filter.