METHOD OF DETECTING PRESENCE OF SPECTRALLY SPREAD SIGNALS

摘要

The present invention relates to a method of detecting the presence or absence of a spectrally spread signal in a frequency band of interest of a signal received, in which: - the autocorrelation function of said signal received is calculated for a set ( S* ) of non zero values of time shift (m); - at least one cyclic correlation coefficient Formula (I) of the autocorrelation function is determined for said time shift values; - the energy of the autocorrelation function is estimated on the basis of the quadratic sum of the values taken by said cyclic correlation coefficient for said time shift values; the energy thus estimated is compared with a predetermined threshold value and the presence or absence of said spectrally spread signal in the signal received is deduced from the result of the comparison.