Patent ID: 7277509

Claim:
A receiver for use in a mobile communications network, the receiver comprising: an input for receiving radio signals including control symbols and data symbols; a first filter at a first sampling rate connected to receive said control symbols and to generate control samples therefrom, a channel estimator arranged to use the control samples to provide a channel estimate for correcting received data symbols; a first offset corrector for de-rotating the control samples prior to their use in providing the channel estimate; a second filter connected to received de-rotated control samples from the first offset correct and to supply said de-rotated control samples to the channel estimator for use in providing the channel estimate at a sampling rate different from that of the de-rotated control samples received thereby; a second offset corrector for rotating the channel estimate prior to its use in correcting the received data symbols; and an offset estimator arranged to generate estimates of frequency offset in the received radio signal, for use in the first and second offset correctors.