A receiver for receiving a signal that is representative of a plurality of sub-carriers modulated in dependence on transmit data, the receiver being arranged to determine a plurality of candidate vectors in dependence on the received signal, each of the candidate vectors being indicative of a modulation applied to a respective one of the sub-carriers, the receiver being further arranged to determine that the received signal incorporates a predetermined level of interference in respect of one or more of the sub-carriers and adjust one or more of the candidate vectors in dependence on that determination and determine the transmit data in dependence on the one or more adjusted candidate vectors, the receiver being arranged to adjust the one or more candidate vectors so as to reduce an influence that the candidate vectors indicative of the one or more sub-carriers would otherwise have had on the determination of the transmit data.