Obtaining accurate timing of analog to digital converter samples in cellular modem
AssigneeQUALCOMM Incorporated
InventorsLennart Karl-Axel Mathe, Brian Clarke Banister, Christos Komninakis, Minkui Liu
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Abstract
According to embodiments, an example method for determining an analog-to-digital converter (ADC) output timing in a user equipment may include operating a switch in a first mode to route a system clock from an oscillator to an input of the ADC and determining a first ADC output timing based on a first set of ADC samples generated by the ADC. The method may also include operating the switch in a second mode to route analog signals from a transceiver of the user equipment to the input of the ADC and obtaining a second set of ADC samples generated by the ADC based on the analog signals.
Claims27
A method for determining an analog-to-digital converter (ADC) output timing in a user equipment, comprising:
- operating a switch in a first mode to route a system clock from an oscillator to an input of the ADC;
- determining a first ADC output timing based on a first set of ADC samples generated by the ADC;
- operating the switch in a second mode to route analog signals from a transceiver of the user equipment to the input of the ADC;
- and
- obtaining a second set of ADC samples generated by the ADC based on the analog signals.
A device comprising:
- one or more transceivers configured to receive analog signals;
- an analog-to-digital converter (ADC) configured to generate ADC samples;
- a switch operatively connected to the one or more transceivers and the ADC;
- and
- one or more processors configured to:
- operate the switch in a first mode to route a system clock from an oscillator to an input of the ADC;
- determine a first ADC output timing based on a first set of ADC samples generated by the ADC;
- operate the switch in a second mode to route analog signals from the one or more transceiver to the input of the ADC;
- and
- obtain a second set of ADC samples generated by the ADC based on the analog signals.
A user equipment (UE) comprising:
- means for operating a switch in a first mode to route a system clock from an oscillator to an input of the ADC;
- means for determining a first ADC output timing based on a first set of ADC samples generated by the ADC;
- means for operating the switch in a second mode to route analog signals from a transceiver of the user equipment to the input of the ADC;
- and
- means for obtaining a second set of ADC samples generated by the ADC based on the analog signals.
Dependencies are inferred from the claim text.