Patent ID: 7310395

Claim:
A method for correlative estimation of a mobile radio channel on the basis of a training sequence (TS) which is transmitted via the mobile radio channel and has the characteristic that a subsequence of a predetermined length P of the training sequence is orthogonal to subsequences of the training sequence shifted through up to Lt subsequent elements, wherein P and Lt are integers, comprising: (1) correlating a sequence of P received symbols with the subsequence of length P of the training sequence to calculate a first estimated channel coefficient (ĥ 0 (1) ); (2) correlating the same sequence of P received symbols with at least some of the subsequences of the training sequence (TS) shifted through ±1, ±2, . . . , ±(Lt−1) symbol positions to calculate a number of further estimated channel coefficients (ĥ ±1 (1) ,ĥ ±2 (1) , . . . ,ĥ ±(Lt−1) (1) ), wherein a correlation window defined by the subsequence of the predetermined length P moves over the training sequence in act (2); and (3) using the estimated channel coefficients (ĥ ±1 (1) ,ĥ ±2 (1) , . . . , ĥ ±(Lt−1) (1) ) to update a channel impulse response of the mobile radio channel.