Patent ID: 7215645

Claim:
A process for estimating unknown parameters (Δω,Δφ,ε, . . . ) of a CDMA signal (r desc (v)). which is sent by means of a transmission channel, in which the CDMA-signal has experienced changes of the parameters (Δω,Δφ, ε, . . . ), the process comprising: receiving the CDMA signal (r desc (v)) having unknown parameters (Δω,Δφ,ε, . . . ); forming of a cost function (L), which is dependent on estimated values (Δω,Δφ,ε, . . . ) of combined unknown parameters (Δω,Δφ,ε, . . . ), partial differentiating of the cost function in respect to the estimate values (Δω,Δφ,ε, . . . ) of the unknown parameters (Δω,Δφ,ε, . . . ), forming of a matrix-vector-equation computing of at least some of the matrix elements of the matrix-vector-equation with a Fast-Hadamard-Transformation; and conveying the computed matrix elements to interpret the received CDMA signal.