NONLINEAR COMPENSATION METHOD AND RADIO OVER FIBER SYSTEM

The present application provides a nonlinear compensation method and a radio over fiber (ROF ) system. The method comprises: an RRU acquiring a first input training signal; the RRU inputting the first input training signal into a feedback link; a DPD processing unit acquiring a first output training signal outputted from the feedback link; the DPD processing unit determining, according to the first input training signal and the first output training signal, nonlinear characteristics of the feedback link; the DPD processing unit performing, according to the nonlinear characteristics of the feedback link, nonlinear compensation on the feedback link. The nonlinear compensation method provided by the embodiments of the present application can pre-obtain the nonlinear characteristics of the feedback link in an ROF radio transmitter, and pre-compensate the nonlinear characteristics of the feedback link. Thereafter, the real nonlinear characteristics of the downlink can be obtained, so that the real nonlinear charac