Patent Document ID: 9729255
Application ID: 15166698
Patent Flag: 1

Claim One:
1. A method of calibrating a device under calibration (DUC) using a calibration system for optimizing performance of the DUC, the calibration system comprising a power supply, a signal generator, a baseband gain adjuster, a voltage/current (V/I) bias generator and a signal analyzer, the method comprising: a) receiving calibration input from a user, the calibration input comprising at least a power supply voltage value (Vbatt), average output power set points and one or more RF carrier frequencies of an output signal of the DUC, stimulus signal characteristics of a stimulus signal to be input to the DUC, DUC specification values, and coefficients for a predetermined error function (EF) algorithm for determining an error function (EF) of the DUC; b) outputting the power supply voltage value to the power supply; c) outputting the stimulus signal characteristics to the signal generator, the stimulus signal characteristics including modulation type and duty cycle of the stimulus signal output by the signal generator, wherein the stimulus signal characteristics appearing at an input of a power amplifier in the DUC are within a normal operating range of the DUC to avoid damaging the DUC due to stress caused by stimulus signal characteristics outside the normal operating range and otherwise not representative of operational requirements of the DUC; d) outputting parameters indicating the one or more RF carrier frequencies to the DUC; e) setting values for calibration parameters of the DUC, the calibration parameters comprising at least bias parameters, envelope tracker shaping function coefficients, digital pre-distortion coefficients and delay parameters; f) performing an optimization process, comprising: i) applying the values for the calibration parameters to at least one of the DUC and the calibration system, ii) measuring average output power from the DUC, iii) adjusting an amplitude of an RF input signal to the power amplifier in the DUC until the measured average output power from the DUC is substantially equal to a received average output power set point, iv) measuring power supply current, output power and linearity of the output signal of the DUC at the average output power set point for the one or more RF carrier frequencies, v) calculating power added efficiency (PAE) of the output signal using the measured power supply current and the measured output power, vi) repeating steps ii) through v) for each received average output power set point and each of the one or more RF carrier frequencies, and vii) determining a value of the error function (EF) over an aggregate of the measured power supply currents, output powers and linearities corresponding to the received average output power points using the EF algorithm, the EF algorithm coefficients and at least one of the aggregated power supply currents, output powers and linearities, and g) determining whether the value of the EF is less than a predetermined optimization threshold; h) when the value of the EF is greater than the predetermined optimization threshold, simultaneously adjusting the values for the calibration parameters of the DUC, and repeating the optimization process using the adjusted values for the calibration parameters; and i) when the value of the EF is less than the predetermined optimization threshold, using the values for the calibration parameters for operating the DUC.