Dual LO receiver
AssigneeQualcomm Atheros, Inc.
InventorQiang Lin
Life of this patent
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Abstract
A selectable frequency source for use in GPS receivers. A device in accordance with one or more embodiments of the present invention comprises at least one reference frequency source, a circuit, coupled to the at least one reference frequency source, and a mixer, coupled to an output of the circuit, for mixing a GPS signal with the output of the circuit, wherein a frequency output of the mixer is changed based on an input to the circuit.
Claims14
A selectable frequency source for use in a Global Positioning System (GPS) receiver, comprising
- at least one reference frequency source;
- a circuit, coupled to the at least one reference frequency source;
- and
- a mixer, coupled to an output of the circuit, for mixing a GPS signal with the output of the circuit,
- wherein a frequency output of the mixer is changed based on an input to the circuit and wherein the input depends upon expected interference conditions.
A selectable frequency source for use in a Global Positioning System (GPS) receiver, comprising:
- a reference frequency source generating a reference frequency;
- a circuit, coupled to the reference frequency source, the circuit having an output frequency based on the reference frequency;
- and
- a mixer, coupled to the circuit, for mixing a GPS signal with the output frequency of the circuit,
- wherein the output frequency of the circuit is changed based upon expected interference conditions to change a frequency output of the mixer.
A method for changing a local oscillator frequency in a Global Positioning System (GPS) receiver, comprising:
- determining the presence of a signal outside of a GPS spectra;
- and
- setting the local oscillator frequency to a predetermined frequency based on the presence of the signal outside of the GPS spectra.
Dependencies are inferred from the claim text.