It is described a technique to compensate the in-band ripple of filters at the IFFT prior to filtering in the transmitter or, for the receiver, in the FFT after filtering. A transmitter, includes a multiplier for multiplying at least one transmitter coefficient to an input signal of an inverse Fourier transformer which is followed subsequent signal processing chain thereby reducing a ripple on the output of said signal processing chain. A receiver for receiving a transmission signal includes a signal processing chain for processing the transmission signal a multiplier for multiplying at least one receiver coefficient to an output signal of a Fourier transformer to which the output of the signal processing chain is fed to thereby reduce a ripple on said output signal of said Fourier transformer.