METHOD AND DEVICE FOR THE LINEARIZATION OF A HIGH-FREQUENCY HIGH-CAPACITY AMPLIFIER

摘要

The invention relates to a method for the linearization of a high-frequency high-capacity amplifier by means of adaptive digital predistortion of the input signals of the amplifier (5) by determining correctional values that are approximated from DESIRED sender signals detected at the amplifier input and ACTUAL sender signals detected at the amplifier output. To this end, I/Q data continuously derived from the DESIRED sender signals at the digital base band modulator (1) and I/Q data derived by a measuring unit (4) at the amplifier output from the ACTUAL sender signals are fed to a neuronal network for evaluation and for the calculation of correctional values. The correctional values produced are returned to the digital base band modulator (1) and the data flow flowing from the digital base band modulator (1) to the amplifier input is predistorted with the correctional values produced in the neuronal network. The device for carrying out the method for the linearization of a high-frequency high-capacity amplifier by means of adaptive digital predistortion comprises a digital base band modulator (1) that is mounted upstream of a D/A converter (8), a HF modulator (9) and the HF high-capacity amplifier (5). A measuring device (4) is linked with the neuronal network at the output of the HF amplifier (5) via a data link (6) so as to detect the I/Q data and the digital base band modulator (1) is linked with the neuronal network via an I/Q data link (3). A correctional data line (7) links the neuronal network (2) with the digital base band modulator (1).