Wireless time and frequency lock loop system

A system for synchronizing a slave device to a master device, comprising:

• an antenna configured to wirelessly receive a master device reference signal from the master device via a wireless modulated radio frequency signal;
• a tunable reference crystal oscillator for outputting a reference signal at the slave device;
• a time offset detector coupled to a local reference output of a reference crystal oscillator and to a time stamp extractor, the time stamp extractor configured to extract a master device time stamp from the master device reference signal, the time offset detector configured to detect a relative timing difference between the local reference output and the master device time stamp;
• a frequency offset detector coupled to the local reference output of the reference crystal oscillator and to the master device reference signal output of the antenna, the frequency offset detector configured to detect a relative frequency offset between the local reference output and the master device reference signal output using radio frequency characteristics of the master device reference signal;
• a time and frequency control logic circuit coupled to an output of the time offset detector and an output of the frequency offset detector and outputting a reference crystal oscillator control signal based on whether the master device reference signal is leading or lagging the reference crystal oscillator reference signal in time and also based on whether the master device has a carrier frequency that is faster or slower than that of the slave device;
• and
• a digital loop filter coupling the reference crystal oscillator control signal to the reference crystal oscillator,
• wherein the master device reference signal is an arbitrary wireless signal with a known carrier frequency,
• thereby providing a closed loop control system for both frequency offset and time offset of the reference crystal oscillator to be synchronized wirelessly with the master device reference signal in a single processing chain, enhancing effectiveness of both frequency offset and time offset adjustment.