The present invention relates to the field of base stations, in particular to multistandard base stations such as GSM/UMTS base stations. Furthermore, the present invention relates to a transmission method combining signals from two transmitters of such a base station. The transmission method according to the present invention combines signals from two transmitters by providing the signal of a first transmitter 3 to a band-pass filter 5, providing the signal of a second transmitter 2 to a notch filter 6, tuning the band-pass filter 5 and the notch filter 6 to the same frequency, and combining the outputs of the band-pass filter 5 and the notch filter 6.