The present invention discloses a processing device for processing a radio signal, comprising a plurality of receivers designed to receive the radio signal in a predetermined frequency range and to output each signal as a received signal, comprising a detection apparatus designed to detect, for each received signal, a number of sources in the corresponding radio signal, comprising a selection apparatus designed, if there is more than one source in at least one of the received signals, to select one of the receivers on the basis of the information on the number of sources in the individual received signals and to forward the received signal of said selected receiver. The present invention also discloses a corresponding method.