초록 ▼

An OFDM receiver determines (12; 27) the pulse response of a radio channel and locates (13; 14) its starting point, end point and the maximum and its value. The difference between the end point and the starting point gives the length of the pulse response. A guard interval time corresponding to the

An OFDM receiver determines (12; 27) the pulse response of a radio channel and locates (13; 14) its starting point, end point and the maximum and its value. The difference between the end point and the starting point gives the length of the pulse response. A guard interval time corresponding to the guard interval separating the OFDM symbols is set (17; 18) in the receiver in such a manner that it covers the most significant components of the pulse response. A slow and monotonous temporal shift of the pulse response between measurement rounds indicates an error in the sampling frequency. The error is corrected (23; 31) in such a manner that the pulse response shift is compensated for.

대표청구항 ▼

[ What is claimed is:] [1.] A method for synchronizing a receiver to an orthogonal frequency division multiplex (OFDM) signal transmitted on a radio channel, said OFDM signal comprising successive symbols separated by guard intervals, comprising the steps of:determining (12) a pulse response of the

[ What is claimed is:] [1.] A method for synchronizing a receiver to an orthogonal frequency division multiplex (OFDM) signal transmitted on a radio channel, said OFDM signal comprising successive symbols separated by guard intervals, comprising the steps of:determining (12) a pulse response of the radio channel on which the receiver is receiving the transmitted OFDM signal as a received OFDM signal;setting (17; 18) a guard interval time to cause the received OFDM signal to coincide with the most significant components of a pulse response corresponding to one symbol;examining (14) the guard interval time for determining a length of the pulse response with respect to the length of the guard interval, andcomparing pulse response beginning and end points obtained from two successive pulse response estimation rounds to each other and choosing an earlier of beginning points obtained from the two successive estimation rounds as a pulse response beginning point, and choosing a later of the end points obtained from the two successive estimation rounds as the pulse response end point.