Calibrating a power amplifier such as in a remote unit in a wireless distribution system (WDS)
First Claim
1. A method for calibrating an amplifier, comprising:
- providing a plurality of bias signal combinations to an amplifier configured to amplify an input signal to generate an output signal, wherein each of the plurality of bias signal combinations comprises a respective first bias signal and a respective second bias signal to be provided to the amplifier for controlling a first amplifier performance parameter and a second amplifier performance parameter in the output signal, respectively;
receiving a plurality of performance indication signals comprising a plurality of measurements corresponding to the plurality of bias signal combinations, respectively, wherein each of the plurality of measurements comprises the first amplifier performance parameter and the second amplifier performance parameter;
ranking the plurality of measurements;
determining a selected bias signal combination among the plurality of bias signal combinations corresponding to a selected ranked measurement among the plurality of measurements; and
controlling the amplifier to operate based on the selected bias signal combination.
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Abstract
Embodiments of the disclosure relate to calibrating a power amplifier. The power amplifier calibration circuit is configured to provide a plurality of bias signal combinations each including a respective first bias signal and a respective second bias signal to the power amplifier. Power amplifier performance parameters for each of the bias signal combinations can be measured and provided to a control circuit in the power amplifier calibration circuit. The control circuit is configured to rank the measured power amplifier performance parameters based on predefined ranking criteria and determines a selected bias signal combination that can optimize the power amplifier performance parameters of the power amplifier. As such, it is possible to calibrate the power amplifier to operate at a balanced performance level, thus helping to improve radio frequency (RF) coverage and performance of the remote unit in a wireless distribution system (WDS).
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Citations
16 Claims
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1. A method for calibrating an amplifier, comprising:
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providing a plurality of bias signal combinations to an amplifier configured to amplify an input signal to generate an output signal, wherein each of the plurality of bias signal combinations comprises a respective first bias signal and a respective second bias signal to be provided to the amplifier for controlling a first amplifier performance parameter and a second amplifier performance parameter in the output signal, respectively; receiving a plurality of performance indication signals comprising a plurality of measurements corresponding to the plurality of bias signal combinations, respectively, wherein each of the plurality of measurements comprises the first amplifier performance parameter and the second amplifier performance parameter; ranking the plurality of measurements; determining a selected bias signal combination among the plurality of bias signal combinations corresponding to a selected ranked measurement among the plurality of measurements; and controlling the amplifier to operate based on the selected bias signal combination. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for calibrating an amplifier, comprising:
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receiving a modulated broadband input signal, wherein the modulated broadband input signal comprises a first signal in a first signal frequency and a second signal in a second signal frequency; providing a plurality of bias signal combinations to an amplifier configured to amplify an input signal to generate an output signal, wherein each of the plurality of bias signal combinations comprises a respective first bias signal and a respective second bias signal to be provided to the amplifier for controlling a first amplifier performance parameter and a second amplifier performance parameter in the output signal, respectively; receiving a plurality of performance indication signals comprising a plurality of measurements corresponding to the plurality of bias signal combinations, respectively, wherein each of the plurality of measurements comprises the first amplifier performance parameter and the second amplifier performance parameter; ranking the plurality of measurements; and determining a selected bias signal combination among the plurality of bias signal combinations corresponding to a selected ranked measurement among the plurality of measurements. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for calibrating an amplifier, comprising:
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providing a plurality of bias signal combinations to an amplifier configured to amplify an input signal to generate an output signal, wherein each of the plurality of bias signal combinations comprises a respective first bias signal and a respective second bias signal to be provided to the amplifier for controlling a first amplifier performance parameter and a second amplifier performance parameter in the output signal, respectively; receiving a plurality of performance indication signals comprising a plurality of measurements corresponding to the plurality of bias signal combinations, respectively, wherein each of the plurality of measurements comprises the first amplifier performance parameter and the second amplifier performance parameter; ranking the plurality of measurements; determining a selected bias signal combination among the plurality of bias signal combinations corresponding to a selected ranked measurement among the plurality of measurements; and controlling a third-order intermodulation (IMD3) and an adjacent channel power ratio (ACPR) in the output signal based on the respective first bias signal and the respective second bias signal. - View Dependent Claims (15, 16)
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Specification