Patent ID: 8509331

Claim:
A method of blind estimation of at least one modulation parameter (θ) of an OFDM signal comprising a plurality of OFDM symbols, the method comprising: baseband sampling the OFDM signal for a given observation period (T 0 ) to obtain a plurality of samples; calculating, for a plurality of values of the parameter and a block of modulation symbols (a k,n ) of a modulation constellation, a cost function (Ω) depending on a distance between a vector y made up of the plurality of samples and a vector H θ a, wherein a comprises the symbols of the block and H θ comprises a matrix representing the modulation of the sub-carriers of the OFDM multiplex by the modulation symbols, the matrix depending on the parameter to be estimated; and averaging the cost function for each value of the parameter on a set of blocks of possible symbols to obtain an averaged value (E a (Ω(∥y−H θ a∥))) of the cost function, the estimation of the parameter being obtained as the value of the parameter ({circumflex over (θ)}) corresponding to the lowest averaged value ( θ ^ = arg ⁢ ⁢ min θ ⁢ E a ⁡ ( Ω ⁡ (  y - H θ ⁢ a  ) ) ) .