According to the characteristics of high dynamic aircraft platform terminal

this paper studies the problem of frequency accurate estimation in high dynamic aircraft platform terminal communication

and proposes a decomposition algorithm for frequency estimation accurately. Firstly

the approximate position of pilot frame is determined and approximate value of frequency offset is estimated based on the segmented search. Secondly

the accurate position of each date frame is determined by the frequency offset search method

and the higher frequency offset estimation accuracy is obtained by which data frame is de-expanded. Finally

the PN field in data frame is used to further improve frequency offset estimation accurately

and frequency offset equation and historical data are combined to form a set of equations

by which the change rule of frequency offset is obtained and tracked. It is verified that the algorithm proposed in this paper can accurately estimate the frequency offset in terminal communication of high dynamic aircraft platform

which can meet requirement of time-frequency synchronization.