Patent ID: 7424067

Claim:
A receiver for receiving a signal comprising a modulated carrier, with a frame having a first and second training sequences, comprising: a frequency offset estimation unit for receiving the signal and obtaining initial information relating to a carrier frequency offset from a first autocorrelation signal obtained by autocorrelation of the first training sequence of the received signal and for obtaining an estimate of the carrier frequency offset from the initial information and a second autocorrelation signal obtained by autocorrelation of the second training sequence of the received signal, wherein: the initial information comprises a sign of the carrier frequency offset, the second training sequence is longer than the first training sequence, and the autocorrelation of the second training sequence uses more samples than the autocorrelation of the first training sequence; a frequency offset compensation unit for compensating the received signal with the estimate of the frequency offset obtained from the frequency offset estimation unit to form a compensated received signal, and a time reference determining unit for obtaining a timing reference for the received signal by cross-correlation of the compensated received signal with a third training sequence.