System and method of frequency acquisition
OwnerMatthias Brehler, Raghu Challa +2inventors
InventorsMatthias Brehler, Raghu Challa, Amit Mahajan, Emilija Simic
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Abstract
A system, method and device for frequency acquisition. In particular, the embodiments allow for a mobile telephone to simultaneously receive data and/or voice signals while acquiring a GPS signal for its navigation feature. The system, method and device of the present embodiments employ a digital rotator and a local oscillator in concert to acquire the respective signals, correct any frequency errors associated with those signals, and maintain a local timing reference suitable for receiving and transmitting data through a mobile network while simultaneously providing an accurate location through a GPS system.
Claims40
A method of frequency acquisition comprising:
- establishing a frequency of a local oscillator in response to a recent good system (RGS) value;
- receiving a wireless signal;
- calculating a frequency error associated with the wireless signal;
- comparing the frequency error with a first threshold value;
- correcting the frequency error utilizing a digital rotator in response to the frequency error being less than the first threshold value;
- and
- correcting the frequency error utilizing the local oscillator in response to the frequency error being greater than the first threshold value.
A receiver comprising:
- an antenna adapted to receive a wireless signal;
- a frequency control system comprising a digital rotator and a local oscillator, the frequency control system adapted to correct a frequency error associated with the wireless signal;
- and
- a controller in communication with the digital rotator and the local oscillator, the controller adapted to receive a frequency error associated with the wireless signal and compare the frequency error with a first threshold value,
- wherein the controller controls the digital rotator to correct the frequency error in response to the frequency error being less than the first threshold and the controller controls the local oscillator to correct the frequency error in response to the frequency error being greater than the first threshold value.
A system for frequency acquisition comprising:
- a digital rotator adapted to correct the frequency error in response to the frequency error being less than a first threshold value;
- and
- a local oscillator connected to the digital rotator, the local oscillator adapted to correct the frequency error in response to the frequency error being greater than the first threshold value.
Dependencies are inferred from the claim text.