Mobile communication system with integrated GPS receiver

Details Mobile communication system with integrated GPS receiver Mobile communication system with integrated GPS receiver

2011-03-01

2011-03-01

Tse, Young T. (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S344000, C329S308000, C342S103000, C455S260000

Reexamination Certificate

active

07899137

ABSTRACT:
A Global Positioning System (GPS) receiver integrated with a cellular phone system, comprising a single-balanced mixer, a poly phase filter, a channel select filter, an analog-to-digital converter, a reference frequency source, and a PLL unit is disclosed. The single-balanced mixer downconverts a GPS signal to generate an in-phase signal I and a quadrature signal Q. The poly phase filter generates an IF signal based on the in-phase signal I and the quadrature signal Q. The channel select filter receives the IF signal to filter unwanted channel signals. The analog-to-digital converter converts the signal from the channel select filter to a digital output signal. The reference frequency source provides a reference frequency to the analog-to-digital converter. The PLL unit receives the reference frequency for generating a clock signal to the single-balanced mixer for downconversion.

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