Frequency converter for converting a digital baseband signal into a real bandpass signal

摘要

The invention relates to a frequency converter for converting a digital baseband signal (2) having a first frequency (0 Hz) into an analog output signal (8), which is centered around a second frequency (f_z, f₁+f_z, f₂+f_z), which is switched in rapidly successive frequency jumps, and to a corresponding method. In order to improve the performance of the frequency converter with regard to the rapid switching of the transmission frequency (f_z, f₁+f_z, f₂+f_z), it is proposed to provide the frequency converter with a digital mixer (9), which transforms the digital baseband signal (2) fed to it to a low intermediate frequency (f₁, f₂), a D/A converter (3) for converting the baseband signal (4) supplied by the digital mixer (9) into an analog bandpass signal (6), and an analog mixer (7), which transforms the analog bandpass signal (6) with a predetermined constant factor (f_z) into a real bandpass signal (8) which is centered around the transmission frequency (f_z, f₁+f_z, f₂+f_z).