Patent ID: 8280311
Filing Date: 2012-10-02
Classification: H04B

Abstract:
1. A method of determining the presence of a cyclostationary telecommunications signal on a frequency band, said method comprising the steps of: /a/ determining an energy vector {circumflex over (T)} comprising m components respectively representative of energy values of an autocorrelation function of the signal received on said frequency band for m shift times; /b/ calculating correlation elements between the m components of the energy vector {circumflex over (T)}; /c/ performing a statistical calculation on the correlation elements calculated so as to determine a statistical indicator l; and /d/ comparing the statistical indicator obtained l with a predetermined threshold to determine the presence of a telecommunications signal on said frequency band, wherein step /a/ of determining the energy vector {circumflex over (T)} comprises: wherein the m components of the vector {circumflex over (T)} are dependent on the sum for all the values of n of the product of the value of the component of the vector Y(n) at the instant n with the value of the component of the vector Z(n) at the same instant n.