Electronic dispersion compensation method, device and system in burst mode

The invention discloses an electronic dispersion compensation method, an electronic dispersion compensation device and an electronic dispersion compensation system in a burst mode. The method comprises the following steps of: determining the current working mode of an optical network unit (ONU), wherein the current working mode is a normal working mode or an initialization working mode; obtainingan initial value of a filter coefficient in the current working mode, wherein the initial value of the filter coefficient in the initialization working mode is a preset random value and the initial value of the filter coefficient in the normal working mode is a final value of the filter coefficient in the initialization working mode; receiving data sent by the ONU and filtering the data sent by the ONU by adopting the initial value of the filter coefficient in the current working mode so as to obtain the data subjected to electronic dispersion compensation (EDC). The embodiment of the invention can realize electronic dispersion compensation in the burst mode.