COMPENSATION FOR NON-LINEARITY IN A RADIO FREQUENCY POWER AMPLIFIER

摘要

There is provided a pre-distorter for compensating for non-linearity in a radio frequency power amplifier (RFPA). The RFPA comprises a transistor having an input terminal, an output terminal, and a control terminal. The pre-distorter is operative to acquire an input sequence. The pre-distorter is operative to determine a compensated RFPA input sequence based on the input sequence and by implementing compensation of non-linearity in the RFPA based on a behaviour model of the RFPA. The behaviour model at least comprises a nonlinear input terminal element and a recursive linear input terminal reflection filter element such that output of the recursive linear input terminal reflection filter element provides input to the nonlinear input terminal element. Separate nonlinear and linear functions for each harmonics are provided in the behaviour model.