Gps ready digital cellular telephone

Details Gps ready digital cellular telephone Gps ready digital cellular telephone

H - Electricity

04

Q

H04Q 7/32 (2006.01) G01S 5/00 (2006.01) G01S 5/14 (2006.01)

Patent

CA 2177310

A cellular telephone system has an antenna for receiving a location system signal such as GPS and a cellular signal, a location system receiver coupled to the antenna, a mobile radio telephone transceiver, such as digital cellular, coupled to the antenna, and a processor coupled to the global positioning system receiver and to the cellular telephone transceiver. The global positioning system receiver employs a GPS demodulator for demodulating a first position signal, a second position signal, and a third position signal from first, second and third earth orbit satellites. The cellular telephone transceiver employs a receive channel for demodulating an incoming portion of the cellular signal and generating an incoming intermediate frequency signal in response thereto, and a transmit channel for modulating an outgoing intermediate frequency signal and for generating an outgoing portion of the cellular signal in response thereto. In addition, the cellular telephone transceiver employs an interface circuit for converting the incoming intermediate frequency signal and for converting an outgoing digital signal. The processor determines an approximate location of the cellular telephone system, encodes an outgoing voiceinformation signal, and decodes the incoming intermediate frequency signal.

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