Clock multiplexing for baseband automatic frequency correction

A method comprising:

• generating a first clock reference;
• operating a global positioning system (GPS) module in response to the first clock reference;
• in response to an automatic frequency correction signal, generating a second clock reference by performing automatic frequency correction on the first clock reference;
• in response to the automatic frequency correction signal, generating a third clock reference by performing automatic frequency correction on the first clock reference;
• receiving radio frequency signals from a wireless medium;
• in response to the third clock reference, generating baseband signals based on the received radio frequency signals;
• selecting one of the first clock reference and the second clock reference;
• and
• in response to the selected one of the first clock reference and the second clock reference, generating the automatic frequency correction signal based on the baseband signals.

A wireless communications system comprising:

• a clock module configured to generate a first clock reference;
• a communications module configured to operate in response to the first clock reference and independent of a corrected clock reference, wherein the corrected clock reference is generated by performing automatic frequency correction on the first clock reference according to an automatic frequency correction signal;
• a receiver module configured to (i) receive radio frequency signals from a wireless medium, and (ii) in response to the corrected clock reference, generate baseband signals based on the received radio frequency signals;
• and
• a baseband module configured to (i) receive the baseband signals, and (ii) in response to a selected one of the first clock reference and the corrected clock reference, generate the automatic frequency correction signal based on the baseband signals.

A method of operating a wireless communications system, the method comprising:

• generating a first clock reference;
• operating a wireless communications module in response to the first clock reference and independent of a corrected clock reference, wherein the corrected clock reference is generated by performing automatic frequency correction on the first clock reference according to an automatic frequency correction signal;
• independent of the wireless communications module, receiving radio frequency signals from a wireless medium;
• in response to the corrected clock reference, generating baseband signals based on the received radio frequency signals;
• and
• in response to a selected one of the first clock reference and the corrected clock reference, generating the automatic frequency correction signal based on the baseband signals.