A wireless communications system for transmitting an input signal , comprising: an automatic gain adjuster, AGC, configured to adjust a gain of a feedback signal to generate a gain adjusted feedback signal; a predistorter module configured to: receive the gain adjusted feedback signal from the AGC ; compare the gain adjusted feedback signal to the input signal to detect existing distortion in the gain adjusted feedback signal; and upon a determination that the existing distortion is greater than a predetermined distortion threshold, add inverse distortion to an output signal to generate a distorted output signal with added distortion, the inverse distortion added to the output signal being based on the existing distortion detected in the gain adjusted feedback signal to counter distortion caused by a GaN power amplifier ; an upconverter configured to upconvert the input signal to an intermediate frequency prior to the predistorter module comparing the input signal to the gain adjusted feedback signal; the GaN power amplifier configured to amplify power of the distorted output signal to generate an amplified signal; a coupler configured to provide the feedback signal to the AGC and sample the amplified signal from the GaN power amplifier to provide the feedback signal to the AGC ; and an antenna configured to transmit the amplified signal. an automatic gain adjuster, AGC, configured to adjust a gain of a feedback signal to generate a gain adjusted feedback signal; a predistorter module configured to: receive the gain adjusted feedback signal from the AGC ; compare the gain adjusted feedback signal to the input signal to detect existing distortion in the gain adjusted feedback signal; and upon a determination that the existing distortion is greater than a predetermined distortion threshold, add inverse distortion to an output signal to generate a distorted output signal with added distortion, the inverse distortion added to the output signal being based on the existing distortion detected in the gain adjusted feedback signal to counter distortion caused by a GaN power amplifier ; receive the gain adjusted feedback signal from the AGC ; compare the gain adjusted feedback signal to the input signal to detect existing distortion in the gain adjusted feedback signal; and upon a determination that the existing distortion is greater than a predetermined distortion threshold, add inverse distortion to an output signal to generate a distorted output signal with added distortion, the inverse distortion added to the output signal being based on the existing distortion detected in the gain adjusted feedback signal to counter distortion caused by a GaN power amplifier ; an upconverter configured to upconvert the input signal to an intermediate frequency prior to the predistorter module comparing the input signal to the gain adjusted feedback signal; the GaN power amplifier configured to amplify power of the distorted output signal to generate an amplified signal; a coupler configured to provide the feedback signal to the AGC and sample the amplified signal from the GaN power amplifier to provide the feedback signal to the AGC ; and an antenna configured to transmit the amplified signal. <EOS>