Patent ID: 6430239
Filing Date: 2002-08-06
Classification: H04B

Abstract:
A process for cyclic detection of a diversity of polarized digital cyclostationary radioelectric signals comprising:acquiring for any pair of antennas of a network of N antennas, N being at least two, over an observation period T and in an acquisition band Bacq, digital signals of sampling frequency Fe transmitted in a frequency channel of bandwidth Bmax; calculating, for each cyclic frequency of a determined cyclic frequency/harmonic frequency space limited by the bandwidth Bmax of the frequency channel and the acquisition band Bacq of the digital signals acquired, a cyclic covariance matrix on a first moment of a spectral correlation of the acquired digital signals, and a cyclic covariance matrix on a second moment of a spectral correlation of the acquired digital signals; and detecting peaks of spectral correlation by comparing a likelihood ratio (V(&agr;k)) determined from each cyclic covariance matrix (U(&agr;k)) with a statistically determined detection threshold (&bgr;M).