The invention aim at the frequency division duplex - orthogonal frequency division multiplexing (FDDOFDM) system, bring a project of bating downward neighboring plat disturbance. By divide grades for every user of the every plot, according to the grades, assign different sending power for the different user's symbol that send in the same frame or sub-frame, then bate, change and balance between each symbol in the frame or the sub-frame by disturbance, under the precondition that do not change the disturbing level of the neighboring plot, realize the equitableness between the edge user of the plot and the center user of the plot, date the disturbance effectively between the plots.