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Temperature Dependent Robust Behavioral Modeling of Non-Linear Power Amplifier

The performance and characteristics of a power amplifier (PA) are substantially changed by the variation of operating power level or ambient temperature. In this work, the steady state channel temperature of a PA is identified as an effective parameter for robust PA behavioral modeling under such practical variation. The model coefficients of the power amplifier at different input signal level are estimated as a function of temperature. The performance of the proposed temperature dependent PA modeling is evaluated with a 600 W digital video broadcasting- terrestrial (DVB-T)PA at 600 MHz. Measurement results shows the average NMSE of the proposed modeling approach below −35 dB which can go as high as 10 dB if not compensated properly when the operating power level changes. Such robustness of the temperature dependent high-power PA modeling at operating power variation is highly desirable.