Patent ID: 8553789

Claim:
A method of estimating at least one modulation parameter of an OFDM signal, said signal being sampled during a time window in order to provide a sequence of samples, said method comprising: (a) grouping together consecutive samples of said sequence according to a tested value ({tilde over (θ)}) of said parameter, in order to form a plurality of vectors; (b) estimating a covariance matrix ({circumflex over (R)} yy ({tilde over (θ)})) of the vectors; (c) calculating a theoretical covariance matrix (R yy ({tilde over (θ)})) that would be obtained using an OFDM signal of which said modulation parameter would have said tested value; (d) measuring a distance between the covariance matrix and the theoretical covariance matrix; and iterating the steps (a), (b), (c) and (d), wherein the estimated value of the parameter is that achieving a shortest distance in the step (d).