Abstract: A method and apparatus for processing or generating a high-frequency signal using parallel and undersampled baseband signal processing in the frequency domain.

Abstract: The method according to the invention and the device according to the invention for receiving at least one high-frequency signal (x(t)) using parallel and undersampled baseband signal processing generate a plurality of filtered signals (y1(t), y2(t), . . . , yN(t)) through parallel filtering of the high-frequency signal (x(t)), wherein each individual filtering is performed in each case by means of a different filter frequency response. An associated digitized filtered signal (y1(n·TA), y2(n·TA), . . . , yN(n·TA)) is then generated in each case for each filtered signal (y1(t), y2(t), . . . , yN(t)) through analog-to-digital conversion of the respective filtered signal (y1(t), y2(t), . . . , yN(t)), wherein each analog-to-digital conversion is performed in each case by means of undersampling. Finally, the signal components (x1(n·TA), . . . , xM(n·TA); X1(k·?f), . . .