Device and method for processing an input signal and radar device

A radar device, comprising:

• a transceiver unit configured to emit a radar signal and receive the reflected radar signal in order to generate an input signal;
• and
• a device for processing the input signal generated by the transceiver unit, the device including:
• a local oscillator configured to generate an oscillator signal;
• a subtracting unit configured to subtract an amplified correction signal from the input signal in order to generate a corrected input signal;
• a down mixer configured to mix the corrected input signal downward to an intermediate frequency using the oscillator signal in order to generate a difference signal;
• a first amplifier unit configured to amplify the difference signal in order to generate and output an output signal;
• a correcting unit configured to suppress a predefined frequency range of the output signal in order to generate a correction-difference signal;
• an up mixer configured to mix the correction-difference signal upward using the oscillator signal in order to generate a correction signal;
• and
• a second amplifier unit configured to amplify the correction signal to generate the amplified correction signal;
• wherein the correcting unit encompasses a low-pass filter.

A method for processing an input signal, comprising:

• generating an oscillator signal;
• subtracting an amplified correction signal from the input signal in order to generate a corrected input signal;
• mixing the corrected input signal downward to an intermediate frequency using the oscillator signal in order to generate a difference signal;
• amplifying the difference signal in order to generate and output an output signal;
• suppressing a predefined frequency range of the output signal in order to generate a correction-difference signal;
• mixing the correction difference signal upward using the oscillator signal in order to generate a correction signal;
• and
• amplifying the correction signal in order to generate the amplified correction signal;
• wherein the suppression of the predefined frequency range of the output signal is carried out with the aid of a low-pass filter.