Joint Adaptive Compensation for Amplifier Nonlinearity and Quadrature Demodulation Errors

摘要

A joint adaptive compensation technique for amplifier nonlinearity and quadrature demodulation error is provided to develop a parameter variable acquisition process for a pre distorter without a quadrature modulation error on a transmission path. A quadrature-demodulated signal is processed by quadrature demodulation compensation(500). The quadrature-compensated signal is processed by the predistortion training(600). A parameter variable vector including quadrature demodulation compensation and predistortion is obtained by using the predistortion-trained signal and a signal of pre-distorting a transmission signal. A predistortion parameter variable is extracted from the parameter variable vector including quadrature demodulation compensation and predistortion.