Back to results
US 7,251,467 B2Granted
Telecommunications using a tunable oscillator
AssigneeQUALCOMM Incorporated
InventorsAndrew Sendonaris, Da-shan Shiu, Dominic Gerard Farmer, Jeremy H. Lin, Parvathanathan Subrahmanya, Thomas K. Rowland
Life of this patent
Estimating the term…
Abstract
Systems and techniques are disclosed relating to wireless communications. These systems and techniques involve wireless communications wherein a device may be configured to recover an information signal from a carrier using a reference signal, detect a frequency error in the information signal; and periodically tune the reference signal to reduce the frequency error.
Claims27
A communications device, comprising:
- a tunable oscillator configured to produce a first reference signal and to produce a second reference signal;
- a first receiver configured to recover first information signal from a first carrier using the first reference signal;
- a second receiver configured to recover a second information signal from a second carrier using the second reference signal, the second receiver being configured to operate in an active state and an idle state;
- and
- a processor configured to detect a frequency error in the information signal, periodically tune the oscillator to reduce the frequency error and to enable the tuning of the oscillator if the frequency error crosses a first threshold, and once enabled, continue tuning the oscillator until the frequency error is reduced below a second threshold, wherein the first and second thresholds are a function of the state of the second receiver.
2 more elements
A communications device, comprising:
- a tunable oscillator configured to produce a first reference signal and a second reference signal;
- a first receiver configured to recover first information signal from a first carrier using the first reference signal;
- a second receiver configured to recover a second information signal from a second carrier using the second reference signal and to operate in an active state and an idle state;
- and
- a processor configured to detect a frequency error in the first information signal, and tune the oscillator if the frequency error crosses a first threshold, wherein the first threshold is a function of the state of the second receiver, the processor being further configured to disable the second receiver during the tuning of the oscillator.
2 more elements
A method of communications, comprising:
- recovering a first information signal from a first carrier using a first reference signal;
- periodically computing a navigational solution from a second information signal from a Global Positioning Satellite system, the second information signal being recovered from a second carrier using a second reference signal;
- detecting a frequency error in the first information signal;
- and
- periodically tuning the first reference signal to reduce the frequency error and enabling the tuning of the first reference signal when the frequency error crosses a first threshold, and once enabled, continuing to tune the first reference signal until the frequency error is reduced below a second threshold, the first reference signal and the second reference signal being generated from a common oscillator, and wherein the first and second thresholds are a function of whether the computational solution is being computed.
2 more elements
Dependencies are inferred from the claim text.