Patent ID: 7336736
Filing Date: 2008-02-26
Classification: G01S,H04B

Abstract:
1. A method of detecting and processing pulsed signals present in radio signals applied to the input of a radiofrequency receiver, the receiver having an analog to digital converter for performing the coding into digital on N bits of a packet K of P successive samples of the analog signal applied to the input of the receiver and a computer for processing the said digital signals, the method comprising the steps of: grading of successive samples in amplitude- increasing ranges Fx of samples levels, x being an integer lying between 1 and m; counting the number of samples Ny per range Fx of amplitude-increasing sample levels, the entirety of the samples of the packet K of P samples being stowed in at least one of the ranges Fx of levels of the samples; determining, from among the ranges Fx of sample levels, of a range Fn, n lying between 1 and m, onward of which the total number of samples Nnor lying in the ranges F counting of the total number of samples Nd in the ranges of increasing levels beyond a range of levels Fd which is such that: Fd=Fn+ΔF, ΔF being a margin or a positive deviation of a number of ranges of sample levels with respect to the range Fn; comparing the total number of samples Nd with a samples threshold Nmax from which is determined the presence or the absence of a pulsed signal in the signal received: if Nd≧Nmax the signal received comprises a pulsed signal, if Nd<Nmax the signal received does not contain any pulsed signal.