Patent ID: 8675792

Claim:
A method of Doppler spread estimation in a multiple carrier mobile communication system, comprising: receiving a signal comprising a symbol-carrier matrix, the symbol-carrier matrix comprising a predetermined pattern of reference symbols; determining at least one channel estimate Ĥ i,k at at least one of the reference symbol positions of the reference symbols in the symbol-carrier matrix, wherein i =0,1,2, . . . is the carrier index and k =0,1,2, . . . is the symbol index of the symbol-carrier matrix; determining an auto-correlation of the at least one channel estimate Ĥ i,k ; and determining a Doppler spread {circumflex over (ω)} D on the basis of the at least one determined channel estimate Ĥ i,k by minimizing a distance between a zero-order Bessel function of the first kind calculated at a distance of n symbol periods T s from the symbol position of the at least one of the reference symbol positions and the autocorrelation of the at least one channel estimate at the distance of n symbol periods T s wherein [n=0,1,2, . . . ].