Nonlinear damage compensation method and system

The invention discloses a nonlinear damage compensation method and system, and the method comprises the steps: obtaining a receiving signal, and obtaining a plurality of sub-band signals according to the receiving signal; obtaining a plurality of compensated sub-band signals according to the plurality of sub-band signals, and performing compensation operation on the plurality of sub-band signals to obtain a plurality of compensated sub-band signals; wherein the compensation operation comprises phase correction, at least one polarization of the first sub-band signal exists in the phase correction, phase correction values of at least two sampling points are both related to the second sub-band signal, and the phase correction amount caused by the second sub-band signal is the same as the at least two sampling points; and obtaining a compensated full-band signal according to the plurality of compensated sub-band signals. According to the invention, the compensation complexity is reduced by using the similarity of