Non-linear system distortion correction apparatus and method

The invention discloses a non-linear system distortion correction apparatus and method. The apparatus comprises a robustness signal source generator which is used for generating a robustness signal provided to an adaptive device, the adaptive device which is used for collecting a main link signal output by a signal generator and a feedback signal returned by the main link signal via a feedback link and for generating a correction parameter according to the main link signal, a feedback signal and the robustness signal, and a precorrection device which is used for precorrecting the main link signal output by the signal generator according to the correction parameter. By providing the robustness signal, a fact is ensured that under various dynamic configuration conditions, a system cannot cause a problem of unknowable power sudden change or abnormal frequency spectrum output after a practical link signal passes through a predistortion module as the signal feature difference between a former configuration and a later configuration is over large, so that the robustness of the system under dynamic operation conditions is improved, and configuration requirements for various frequency ranges of operators and telephone traffic dynamic change requirements in different areas can be met.