Patent ID: 7133647

Claim:
A wireless transceiver comprising: a receiver to receive coded information signals; a transmitter to transmit coded information signals; a local oscillator providing a time and frequency reference for said receiver and said transmitter; a timing controller providing timing signals for said receiver and said transmitter; a signal processor to decode said coded information signals received by said receiver and to determine a timing error associated with said timing controller based on said received coded information signals; and an automatic frequency control circuit outputting a control signal to said local oscillator responsive to a frequency error to adjust the frequency reference output by said local oscillator, said automatic frequency control circuit including an integrator to integrate said frequency error to generate said control signal; a timing correction circuit to smoothly adjust timing of said coded information transmitted by said transmitter responsive to said timing error to reduce said timing error over a desired time interval, said timing control circuit comprising: a timing correction loop to generate a frequency offset value based on said timing error that modifies the frequency error so as to bias the frequency reference output by said local oscillator in a manner to reduce the timing error, a scaling and filtering unit to smooth the timing error over a predetermined period of time; an integrator to integrate said timing error to generate said frequency offset value to produce an increasing frequency bias as long as the sign of the timing error remains the same.