The invention concerns a method for conditioning a multicarrier transmit signal using a first or a second set of subgroups of time-frequency resource elements, with a subgroup of the first set of subgroups and a subgroup of the second set of subgroups having common time or frequency resources and being neighbored in time or frequency, wherein a first filter module (FILT1) filters the first set of subgroups using a first filter characteristic by a first set of filter coefficients, and a second filter module (FILT2) filters the second set of subgroups using a second filter characteristic by a second set of filter coefficients, and a base station and a transmitter apparatus (TA) therefor.