A device for processing a discrete-time signal, comprising: a processor stage configured to: filter the signal which is present in a discrete frequency-domain representation by a filter with a filter characteristic by means of a multiplication by a transfer function in order to obtain a filtered signal, provide the filtered signal or a signal derived from the filtered signal with a frequency-domain window function (124, 124a, 124b, 124c) in order to obtain a windowed signal, wherein providing comprises multiplications of frequency-domain window coefficients of the frequency-domain window function by spectral values of the filtered signal or the signal derived from the filtered signal in order to obtain multiplication results, and summing up the multiplication results; and a converter for converting the windowed signal or a signal determined using the windowed signal to a time domain in order to obtain the processed signal, wherein the processor stage is further configured to filter the signal which is present in the discrete frequency-domain representation using a further filter with a further filter characteristic in order to obtain a further filtered signal, to provide the further filtered signal with a further frequency-domain window function in order to obtain a further windowed signal, and to combine the windowed signal with the further windowed signal in order to obtain a combination signal or wherein the processor stage is configured to filter the signal which is present in the discrete frequency-domain representation using a further filter with a further filter characteristic in order to obtain a further filtered signal, to form a combination signal from the filtered signal and the further filtered signal, wherein the signal derived from the filtered signal represents the combination signal, to provide the combination signal with the frequency-domain window function in order to obtain a windowed combination signal, and to combine the windowed combination signal with the filtered signal or the further filtered signal. a processor stage configured to: filter the signal which is present in a discrete frequency-domain representation by a filter with a filter characteristic by means of a multiplication by a transfer function in order to obtain a filtered signal, provide the filtered signal or a signal derived from the filtered signal with a frequency-domain window function (124, 124a, 124b, 124c) in order to obtain a windowed signal, wherein providing comprises multiplications of frequency-domain window coefficients of the frequency-domain window function by spectral values of the filtered signal or the signal derived from the filtered signal in order to obtain multiplication results, and summing up the multiplication results; and filter the signal which is present in a discrete frequency-domain representation by a filter with a filter characteristic by means of a multiplication by a transfer function in order to obtain a filtered signal, provide the filtered signal or a signal derived from the filtered signal with a frequency-domain window function (124, 124a, 124b, 124c) in order to obtain a windowed signal, wherein providing comprises multiplications of frequency-domain window coefficients of the frequency-domain window function by spectral values of the filtered signal or the signal derived from the filtered signal in order to obtain multiplication results, and summing up the multiplication results; and a converter for converting the windowed signal or a signal determined using the windowed signal to a time domain in order to obtain the processed signal, wherein the processor stage is further configured to filter the signal which is present in the discrete frequency-domain representation using a further filter with a further filter characteristic in order to obtain a further filtered signal, to provide the further filtered signal with a further frequency-domain window function in order to obtain a further windowed signal, and to combine the windowed signal with the further windowed signal in order to obtain a combination signal or wherein the processor stage is configured to filter the signal which is present in the discrete frequency-domain representation using a further filter with a further filter characteristic in order to obtain a further filtered signal, to form a combination signal from the filtered signal and the further filtered signal, wherein the signal derived from the filtered signal represents the combination signal, to provide the combination signal with the frequency-domain window function in order to obtain a windowed combination signal, and to combine the windowed combination signal with the filtered signal or the further filtered signal.