GSM cellular telephone and GPS receiver combination
First Claim
1. A GSM/GPS receiver combination for receiving a global system for mobile telecommunications (GSM) signal including a frequency correction beacon (FCB) signal and information for a GSM communication, and a global positioning system (GPS) signal including information for a GPS location, the GSM/GPS receiver combination comprising:
- a GSM reference oscillator for providing a GSM reference signal having a GSM reference frequency;
a GSM receiver for using said GSM reference signal for receiving said GSM signal and providing said GSM communication;
an executable GSM frequency correction code for directing the GSM receiver for using said FCB signal and said GSM reference frequency for calculating a GSM-based frequency correction;
a GPS receiver for using said GSM reference signal and said GSM-based frequency correction for receiving said GPS signal and providing a GPS correlation signal; and
a microprocessor system for executing said GSM frequency correction code and cooperating with the GPS receiver for processing said GPS correlation signal for providing said GPS location.
1 Assignment
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Accused Products
Abstract
A GPS/GSM receiver combination for receiving GSM and GPS signals using an RF GPS integrated circuit for downconverting the GPS signal. The GPS integrated circuit includes a synthesizer for generating LO signals, first and second downconverters for using the LO signals for downconverting the GPS signal, and a sampler for providing in-phase and quadrature phase sampled output signals representative of the GPS signal. The synthesizer includes a multi-mode divider for providing substantially the same first LO frequency at about the midpoint of the L1 and L2 GPS frequencies when either of a standard GSM reference frequency or historically common GPS reference frequency is selected. A standby mode in the integrated circuit is controlled by a power logic circuit using a power supply input as a logic control signal. The GSM/GPS receiver combination includes a GSM reference oscillator and a microprocessor system including a GSM frequency correction code for correcting the GSM reference frequency based upon a frequency correction beacon (FCB) signal received in the GSM signal. The GSM-based correction is then used for correcting the GSM reference frequency in order to center a frequency search for acquiring the GPS signal.
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Citations
22 Claims
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1. A GSM/GPS receiver combination for receiving a global system for mobile telecommunications (GSM) signal including a frequency correction beacon (FCB) signal and information for a GSM communication, and a global positioning system (GPS) signal including information for a GPS location, the GSM/GPS receiver combination comprising:
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a GSM reference oscillator for providing a GSM reference signal having a GSM reference frequency; a GSM receiver for using said GSM reference signal for receiving said GSM signal and providing said GSM communication; an executable GSM frequency correction code for directing the GSM receiver for using said FCB signal and said GSM reference frequency for calculating a GSM-based frequency correction; a GPS receiver for using said GSM reference signal and said GSM-based frequency correction for receiving said GPS signal and providing a GPS correlation signal; and a microprocessor system for executing said GSM frequency correction code and cooperating with the GPS receiver for processing said GPS correlation signal for providing said GPS location. - View Dependent Claims (2, 3)
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4. A method for receiving a global system for mobile telecommunications (GSM) signal including a GSM frequency correction beacon (FCB) signal and information for a GSM communication, and a global positioning system (GPS) signal including information for a GPS location in a GSM/GPS receiver combination, the method comprising steps of:
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generating a GSM reference signal having a GSM reference frequency; using said GSM reference signal for receiving said GSM signal and providing said GSM communication information; comparing said GSM reference frequency to a frequency of said FCB signal for providing a GSM-based frequency correction; using said GSM reference signal and said GSM-based frequency correction for receiving said GPS signal and providing a GPS correlation signal; and processing said GPS correlation signal for providing said GPS location. - View Dependent Claims (5, 6)
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7. A GSM/GPS receiver combination for receiving a global system for mobile telecommunications (GSM) signal including information for a GSM communication and a global positioning system (GPS) signal including information for a GPS location, comprising:
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a GSM reference oscillator for providing a GSM reference signal; a GSM receiver for using said GSM reference signal for receiving said GSM signal having a GSM reference frequency and providing said GSM communication; a GPS receiver for receiving said GPS signal, the GPS receiver including a circuit for selecting a reference signal of one of (i) said GSM reference signal and (ii) a second reference signal having a second reference frequency not equal to said GSM reference frequency and using said selected reference signal for providing a GPS correlation signal; and a microprocessor system for cooperating with the GPS receiver for processing said GPS correlation signal for providing said GPS location. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A method for receiving a global system for mobile telecommunications (GSM) signal including information for a GSM communication and a global positioning system (GPS) signal including information for a GPS location in a GSM/GPS receiver combination, comprising steps of:
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generating a GSM reference signal having a GSM reference frequency; using said GSM reference signal for receiving said GSM signal and providing said GSM communication information; selecting a reference signal from one of (i) said GSM reference signal and (ii) a second reference signal having a second reference frequency not equal to said GSM reference frequency; and using said selected reference signal for receiving said GPS signal and providing a GPS correlation signal; and processing said GPS correlation signal for providing said GPS location. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification