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US 8,576,768 B2Granted
Hybrid multi-band receiver
AssigneeQUALCOMM Incorporated
InventorsLiang Zhao, Roger Brockenbrough, Michael Kohlmann, Cormac S. Conroy, Anup Savla
Life of this patent
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Abstract
The subject matter disclosed herein relates to a system and method for processing wireless signals received from one or more communications systems. In a particular implementation, one or more signals received from one or more communication systems such as a GNSS may be processed in two or more separate wireless signal receiver paths and combined in baseband to share one analog-to-digital converter.
Claims38
A method, comprising:
- receiving two or more wireless signals at a receiver at two or more receiver paths;
- downconverting the two or more received wireless signals using two or more separate complex mixers in the two or more receiver paths to generate at least in-phase and quadrature intermediate frequency signals based, at least in part, on two or more oscillating signals having individually selectable frequencies received from one or more local oscillators to enable oscillating signals at different frequencies to be applied to different ones of said separate complex mixers generating said in-phase and quadrature intermediate frequency signals;
- combining the two or more in-phase and quadrature intermediate frequency signals to generate a combined signal comprising an in-phase component and a quadrature component;
- converting the combined signal to a digital signal using a single analog-to-digital converter, the digital signal comprising an in-phase component and a quadrature component;
- and
- wherein said two or more receiver paths comprise two or more low noise amplifiers, and wherein said in-phase and quadrature intermediate frequency signals are spectrally shifted to different intermediate frequencies by said separate complex mixers.
3 more elements
A mobile station, comprising:
- a receiver comprising two or more radio receiver paths to receive two or more wireless signals;
- two or more separate complex mixers in the two or more receiver paths to downconvert the two or more received wireless signals to generate at least in-phase and quadrature intermediate frequency signals based, at least in part, on two or more oscillating signals having individually selectable frequencies received from one or more local oscillators to enable oscillating signals at different frequencies to be applied to different ones of said separate complex mixers generating said in-phase and quadrature intermediate frequency signals;
- a combiner to combine the two or more in-phase and quadrature intermediate frequency signals to generate a combined signal comprising an in-phase component and a quadrature component;
- an analog-to-digital converter to convert the combined signal to a digital signal using a single analog-to-digital converter, the digital signal comprising an in-phase component and a quadrature component;
- and
- wherein said two or more receiver paths comprise two or more low noise amplifiers, and wherein said in-phase and quadrature intermediate frequency signals are spectrally shifted to different intermediate frequencies by said separate complex mixers.
3 more elements
An apparatus, comprising:
- two or more separate means for receiving two or more wireless signals;
- two or more separate means for downconverting the two or more received wireless signals to generate at least in-phase and quadrature phased intermediate frequency signals based, at least in part, on two or more oscillating signals having individually selectable frequencies received from one or more local oscillators to enable oscillating signals at different frequencies to be applied to different ones of said separate complex mixers generating said in-phase and quadrature intermediate frequency signals;
- means for combining the two or more in-phase and quadrature intermediate frequency signals to generate a combined signal comprising an in-phase component and a quadrature component;
- means for converting the combined signal to a digital signal using a single analog-to-digital converter, the digital signal comprising an in-phase component and a quadrature component;
- and
- wherein said two or more receiver paths comprise two or more low noise amplifiers, and wherein said in-phase and quadrature intermediate frequency signals are spectrally shifted to different intermediate frequencies by said separate complex mixers.
3 more elements
Dependencies are inferred from the claim text.