Apparatus and a method for handling a received signal, and a mixer unit

摘要

An apparatus for handling a received signal comprises a reception device, a mixer unit and a compensating unit. The reception unit can receive a received signal. The received signal has at least one signal component at a first frequency. Furthermore, the mixer unit can combine the received signal and a compensating signal using at least one active element in order to obtain a compensated received signal. In addition, the mixer unit can produce a mixer output signal on the basis of the compensated received signal and a local oscillator signal. In this case, the mixer output signal has a signal component, corresponding to the at least one signal component of the received signal, at a second frequency. The first frequency is higher than the second frequency. Furthermore, the compensating unit can produce the compensating signal on the basis of an analysis of the mixer output signal, as a result of which it is possible for noise components that the mixer output signal contains to be reduced on the basis of the compensating signal.

主权项

1. An apparatus for handling a received signal, comprising:
a reception device configured to receive a received signal, wherein the received signal has at least one signal component at a first frequency; a mixer unit configured to combine the received signal and a compensating signal using at least one active element in order to obtain a compensated received signal, and to produce a mixer output signal on the basis of the compensated received signal and a local oscillator signal, wherein the mixer output signal has a signal component, corresponding to the at least one signal component of the received signal, at a second frequency, the first frequency being higher than the second frequency; a compensating unit configured to produce the compensating signal on the basis of an analysis of the mixer output signal, as a result of which noise components in the mixer output signal can be reduced based on the compensating signal, wherein the mixer unit comprises a mixer to mix the compensated received signal with the local oscillator signal to produce the mixer output signal; and a phase shifter configured to provide the local oscillator signal in temporally successive periods for the mixer unit with different phase shifts, as a result of which the mixer output signal has temporally successive portions with different phase shifts, wherein the compensating unit is configured to produce the compensating signal based on at least two portions of the mixer output signal with different phase shifts.