Patent ID: 6347286
Filing Date: 2002-02-12
Classification: G01R,G01S,H03D

Abstract:
A method of determining 1 characteristics Pq of a signal s(t, Pq) where q is an integer between 1 and l, l is an integer greater than or equal to 1 and t is time, said signal s(t, Pq) being transformed into a discrete spectrum by Fourier transformation, wherein:a) m elements z(fi) of said discrete spectrum are selected where i is an integer between 1 and m and m is an integer greater than or equal to 2, b) a system of m equations is determined respectively relating to said m elements z (fi) selected and defined on the basis of the relations: z(fi)=Fi[w(t).s(t, Pq)].h(f), i varying from 1 through m, in which: Fi is discrete Fourier transform, w(t) is a temporal weighting function, and h(t) is a frequency transfer function of an anti-aliasing filter, and c) the l characteristics Pq are deduced from said system of m equations in l unknowns, wherein when the numbers m and 1 are equal, the characteristics Pq that do not comprise the phase of the signal s(t, Pq) are determined from exact solutions of said system of m scalar equations based on the equality of the moduli.