One inventive aspect relates to a method of estimating carrier frequency offset introduced on an RF multicarrier signal received via a transmission channel on a direct downconversion analog receiver. The method comprises generating a preamble comprising at least one set of training symbols. The method further comprises transmitting the preamble to the receiver. The method further comprises determining a carrier frequency offset estimate from the received preamble by an estimation method which has a higher precision for a first range of carrier frequency offset values and a lower precision for a second range of carrier frequency offset values. The method further comprises introducing a predetermined artificial carrier frequency offset on at least one set of training symbols, the predetermined artificial carrier frequency offset being chosen for shifting the carrier frequency offset of that set of training symbols to the first range.