Patent Number: 7,787,571

Title: Method for the higher-order blind demodulation of a linear waveform transmitter

Abstract: Process for the blind demodulation of a linear waveform source or transmitter in a system comprising one or more sources and an array of sensors and a propagation channel. The process comprises at least the following steps: the symbol period T is determined and sampled to Te such that T=IT.sub.e (I being an integer); a spatio-temporal observation z(t), the mixed sources of which are symbol trains from the transmitter, is constructed from the observations x(kT.sub.e); an ICA-type method is applied to the observation vector z(t) in order to estimate the L.sub.c symbol trains {a.sub.m-i} that are associated with the channel vectors h.sub.z,j=h.sub.z(k.sub.j); the L.sub.c outputs (a.sub.m,j, h.sub.z,j) are arranged in the same order as the inputs (a.sub.m-i,h.sub.z(i)) so as to obtain the propagation channel vectors h.sub.z,j=h.sub.z(k.sub.j); and the phase .alpha..sub.imax associated with the outputs is determined.

Inventors: Ferreol; Anne (Colombes, FR), Albera; Laurent (Boulogne Billancourt, FR), Castaing; Josephine (Paris, FR)

Assignee: Thales

International Classification: H04L 27/00 (20060101)

Expiration Date: 8/31/12018