A receiver which is arranged to receive an RF multi-carrier signal (60) comprises an in-phase mixer (51) for frequency down converting the RF multi-carrier signal to an in-phase multi-carrier signal (I) and a quadrature mixer (52) for frequency down converting the RF multi-carrier signal (60) to a quadrature multi-carrier signal. The receiver further comprises a local oscillator (60) arranged to generate in-phase and quadrature mixing signals (64,65) for the in-phase and quadrature mixers (51,52). The local oscillator (60) is further arranged to add a frequency offset to the in-phase and quadrature mixing signals (65, 65) so as to minimize an error vector magnitude of the in-phase and quadrature multi-carrier signals (I, Q).