Patent ID: 9729255
Date: 2017-08-08
CPC Classifications: H04B

Claim:
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: 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.