Abstract: In a method for residual carrier suppression, in which a vector modulator is used to convert a baseband signal, which comprises an in-phase component and a quadrature component, to a complex output signal, one component of the baseband signal is supplied as a constant signal with a first polarity during a first time period, and a first average power of the output signal is determined. The component is then supplied as a constant signal with a second polarity during a second time period, and a second average power is determined. The DC signal element of the component of the baseband signal is calculated by forming the difference between the first and the second power of the output signal. The value determined in this way may be added to or subtracted from the component of the baseband signal as a constant signal, in order in this way to compensate for a DC signal. The residual carrier is thus suppressed.