Automatic gain control in system simultaneously receiving GPS and GLONASS signals
First Claim
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1. A method of providing automatic gain control (AGC) for a receiver configured to receive both GPS signals and GLONASS signals, the method comprising:
- initializing GPS-specific amplifiers, GLONASS-specific amplifiers, and any shared GPS/GLONASS amplifiers;
correcting a gain of the GPS-specific amplifiers and any shared GPS/GLONASS amplifiers using outputs of a GPS digital front end; and
following a GPS AGC lock, correcting a gain of the GLONASS-specific amplifiers using outputs of a GLONASS digital front end.
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Abstract
A receiver for receiving both GPS signals and GLONASS signals is provided. This receiver includes an analog front end (AFE), a GPS digital front end (DFE) and a GLONASS DFE for receiving an output of the AFE, and a dual mode interface (DMI) for receiving outputs of the GPS and GLONASS DFEs. Search engines are provided for receiving outputs of the DMI. Notably, certain front-end components of the AFE are configured to process both the GPS signals and the GLONASS signals.
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Citations
5 Claims
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1. A method of providing automatic gain control (AGC) for a receiver configured to receive both GPS signals and GLONASS signals, the method comprising:
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initializing GPS-specific amplifiers, GLONASS-specific amplifiers, and any shared GPS/GLONASS amplifiers; correcting a gain of the GPS-specific amplifiers and any shared GPS/GLONASS amplifiers using outputs of a GPS digital front end; and following a GPS AGC lock, correcting a gain of the GLONASS-specific amplifiers using outputs of a GLONASS digital front end.
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2. A method of operating a receiver configured to receive GPS signals and GLONASS signals, the method comprising:
providing automatic gain correction (AGC) to amplifiers in an analog front end (AFE) of the receiver, the providing AGC including; initializing GPS-specific amplifiers, GLONASS-specific amplifiers, and shared GPS/GLONASS amplifiers; correcting a gain of GPS-specific amplifiers and a shared GPS/GLONASS amplifier using outputs of a GPS digital front end (DFE) of the receiver; and following a GPS AGC lock, correcting a gain of GLONASS-specific amplifiers using outputs of a GLONASS DFE of the receiver. - View Dependent Claims (3, 4, 5)
Specification