Patent ID: 8503958

Claim:
A signal processor for processing a receiving signal with a first usable frequency band and a second usable frequency band for obtaining two output signals, comprising: a first mixer for mixing the receiving signal with a first local oscillator signal, wherein a frequency of the first local oscillator signal is asymmetrical between the first usable frequency band and the second usable frequency band, and wherein the first mixer is implemented to acquire an in-phase signal and a quadrature signal with a first signal portion representing a mixed image of the first usable frequency band and with a second signal portion representing a mixed image of the second usable frequency band; and a second mixer for mixing the in-phase signal and the quadrature signal using a second local oscillator signal, wherein a frequency f LO2 of the second local oscillator signal is selected such that the mixed image of the first usable frequency band generated by the first mixer and the mixed image of the second usable frequency band generated by the first mixer are at least partly image bands of each other with regard to the second local oscillator signal, wherein the second mixer is implemented to separately provide information content of the first usable frequency band and the second usable frequency band at its output in order to acquire a first output signal, which substantially comprises information content of the first usable frequency band, and to acquire a second output signal, which substantially comprises information content of the second usable frequency band, and a frequency f 3 describes a lower band limit of the second usable frequency band, wherein a frequency f 4 describes an upper band limit of the second usable frequency band, wherein a frequency f 5 describes a lower band limit of the first usable frequency band, wherein, for a frequency f LO1 of the first local oscillator signal, the following two conditions are fulfilled: f 4 ≦f LO1 ≦f 5 , and f LO1 ≦( f 3 +f 5 )/2; and wherein further the following holds: f 3 ≦f 4 ≦f 5 .