Receiver circuit for mobile radio receivers with automatic gain control
AssigneeInfineon Technologies AG
InventorsDieter Bruckmann, Andre Neubauer
Life of this patent
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Abstract
A receiver circuit for a mobile radio receiver has a controllable amplifier with a variable gain level, an analog-digital converter stage, a digital filter configuration for the purpose of channel selection and a signal strength estimator. The signal strength estimator is connected downstream of the filter configuration in the signal path and has the purpose of determining the signal strength in the selected user signal. The amplifier is controlled in dependence on the user-channel signal strength determined by the signal strength estimator.
Claims16
A receiver circuit for a mobile radio receiver, comprising:
- a controllable amplifier having a variable gain level;
- an analog-digital converter stage connected downstream of said controllable amplifier in a signal path through the receiver circuit;
- a digital filter configuration for channel selection connected downstream of said converter stage;
- a signal strength estimator for determining a signal strength in a selected user channel;
- and
- a feedback connected between said signal strength estimator and said amplifier for controlling said amplifier in dependence on a function of the signal strength of the user-channel determined by said signal strength estimator.
A method for processing a received signal in a mobile radio receiver, which comprises the following steps:
- amplifying the received signal with a controllable amplifier having a variable gain;
- digitizing the amplified signal with an analog-digital converter stage to form a digitized signal;
- limiting a bandwidth of the digitized signal with a digital filter configuration for channel selection;
- and
- determining a signal strength of a selected user-channel signal with a signal strength estimator;
- and
- controlling the controllable amplifier in dependence on the signal strength of the user-channel determined by the signal strength estimator.
Dependencies are inferred from the claim text.