Wireless communications system including dual-purpose clock reference for global positioning system and baseband

摘要

A wireless communications system includes a clock module, a global positioning system (GPS) module, an integrated circuit for a cellular transceiver, and a baseband module. The clock module is configured to generate a first clock reference that is not corrected using automatic frequency correction (AFC). The GPS module is configured to operate in response to the first clock reference. The integrated circuit includes a system phase lock loop (PLL) configured to (i) operate in response to the first clock reference, and (ii) generate a corrected clock reference by performing AFC on the first clock reference in response to an AFC signal. The baseband module is configured to (i) operate in response to the first clock reference from the clock module, and (ii) generate the AFC signal.

主权项

1. A wireless communications system comprising:
a clock module configured to generate a first clock reference that is not corrected using automatic frequency correction (AFC); a global positioning system (GPS) module configured to operate in response to the first clock reference; an integrated circuit for a cellular transceiver, wherein the integrated circuit comprises a system phase lock loop (PLL) configured to (i) operate in response to the first clock reference, and (ii) generate a corrected clock reference by performing AFC on the first clock reference in response to an AFC signal; and a baseband module configured to (i) operate in response to the first clock reference from the clock module, and (ii) generate the AFC signal.